Bio-Rad Laboratories, Inc. (BIO) stock
BIONYSELaboratory Analytical InstrumentsFiscal year ends December 31Also trades as BIO.B
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 4, 2026Score 8/3055% above fair value
$372.18−12.22 (-3.18%)
Close on Oct 30, 2026Market cap $9.99BP/E 45.3Yield –
Price history
Bio-Rad Laboratories share prices for every month, newest first. Adjusted for stock splits, not for dividends.
Close, Oct 30, 2026
$372.18
-3.18% on the day
52-week range
$236.73 – $396.23
-6.1% from the high
Change over 52 weeks
+22.2%
From $304.61 on Oct 30, 2025
Average volume
272,795
Shares a day, last 90 sessions
| Month | Open | High | Low | Close | Change | Volume |
|---|---|---|---|---|---|---|
| Oct 2026 | $373.87 | $390.16 | $347.29 | $372.18 | -1.46% | 5,002,250 |
| Sep 2026 | $387.88 | $394.29 | $365.66 | $377.71 | -2.18% | 5,655,349 |
| Aug 2026 | $324.98 | $396.23 | $319.49 | $386.12 | +18.63% | 5,684,710 |
| Jul 2026 | $293.11 | $337.97 | $281.79 | $325.48 | +10.85% | 6,568,846 |
| Jun 2026 | $311.10 | $312.27 | $270.00 | $293.61 | -6.04% | 7,542,849 |
| May 2026 | $261.47 | $319.86 | $236.73 | $312.48 | +11.55% | 10,252,992 |
| Apr 2026 | $280.38 | $312.85 | $270.37 | $280.12 | +0.49% | 5,758,518 |
| Mar 2026 | $275.41 | $288.81 | $258.95 | $278.75 | +0.11% | 6,954,837 |
| Feb 2026 | $289.11 | $313.41 | $251.00 | $278.44 | -5.20% | 6,099,063 |
| Jan 2026 | $303.22 | $328.56 | $287.46 | $293.70 | -3.07% | 4,688,043 |
| Dec 2025 | $321.44 | $328.07 | $295.01 | $302.99 | -6.73% | 3,590,677 |
| Nov 2025 | $317.04 | $334.53 | $296.15 | $324.86 | +1.66% | 3,252,356 |
| Oct 2025 | $280.61 | $343.12 | $280.61 | $319.55 | +13.97% | 5,909,219 |
| Sep 2025 | $293.83 | $298.00 | $266.71 | $280.39 | -5.87% | 4,574,339 |
| Aug 2025 | $270.93 | $308.44 | $261.65 | $297.88 | +23.12% | 6,092,762 |
| Jul 2025 | $241.43 | $267.49 | $237.63 | $241.95 | +0.26% | 6,054,119 |
| Jun 2025 | $225.00 | $246.76 | $211.43 | $241.32 | +6.34% | 8,489,331 |
| May 2025 | $243.01 | $257.66 | $220.31 | $226.93 | -7.03% | 8,109,323 |
| Apr 2025 | $242.70 | $260.00 | $215.38 | $244.08 | +0.21% | 7,991,443 |
| Mar 2025 | $266.38 | $268.88 | $235.84 | $243.56 | -8.15% | 8,480,375 |
| Feb 2025 | $353.25 | $358.40 | $262.11 | $265.16 | -26.52% | 5,940,300 |
| Jan 2025 | $330.19 | $373.69 | $324.22 | $360.88 | +9.85% | 3,104,450 |
| Dec 2024 | $337.49 | $351.08 | $318.27 | $328.51 | -3.53% | 3,699,116 |
| Nov 2024 | $362.90 | $387.99 | $306.42 | $340.53 | -4.93% | 4,020,821 |
| Oct 2024 | $338.55 | $359.22 | $319.57 | $358.19 | +7.06% | 4,498,488 |
| Sep 2024 | $333.52 | $347.70 | $311.04 | $334.58 | -0.81% | 10,129,649 |
| Aug 2024 | $339.14 | $353.09 | $309.12 | $337.32 | -0.31% | 4,775,326 |
| Jul 2024 | $273.68 | $344.00 | $262.12 | $338.36 | +23.89% | 5,280,007 |
| Jun 2024 | $286.96 | $299.10 | $269.21 | $273.11 | -4.79% | 5,996,822 |
| May 2024 | $270.00 | $302.71 | $266.52 | $286.86 | +6.34% | 4,932,080 |
| Apr 2024 | $346.83 | $346.83 | $268.92 | $269.75 | -22.01% | 4,644,990 |
| Mar 2024 | $324.93 | $360.13 | $322.03 | $345.87 | +6.13% | 3,356,469 |
| Feb 2024 | $320.36 | $364.24 | $312.18 | $325.88 | +1.56% | 4,817,320 |
| Jan 2024 | $320.73 | $338.19 | $302.65 | $320.89 | -0.62% | 4,085,991 |
| Dec 2023 | $305.00 | $326.60 | $293.02 | $322.89 | +5.89% | 5,791,522 |
| Nov 2023 | $274.17 | $314.82 | $267.86 | $304.92 | +10.77% | 6,657,539 |
| Oct 2023 | $355.54 | $366.30 | $261.59 | $275.28 | -23.20% | 5,619,689 |
| Sep 2023 | $403.94 | $406.44 | $349.27 | $358.45 | -10.43% | 3,408,003 |
| Aug 2023 | $403.06 | $419.00 | $375.92 | $400.20 | -1.27% | 3,790,782 |
| Jul 2023 | $378.11 | $431.79 | $369.42 | $405.36 | +6.92% | 4,429,190 |
| Jun 2023 | $374.25 | $388.00 | $356.51 | $379.12 | +1.55% | 4,568,031 |
| May 2023 | $448.70 | $473.50 | $357.96 | $373.35 | -17.18% | 5,942,533 |
| Apr 2023 | $476.47 | $494.05 | $425.74 | $450.79 | -5.89% | 2,358,741 |
| Mar 2023 | $475.56 | $509.62 | $450.05 | $479.02 | +0.25% | 4,042,627 |
| Feb 2023 | $471.70 | $489.73 | $451.92 | $477.84 | +2.22% | 3,486,333 |
| Jan 2023 | $427.08 | $485.21 | $415.04 | $467.46 | +11.17% | 3,082,069 |
| Dec 2022 | $421.09 | $443.33 | $393.72 | $420.49 | +1.39% | 3,262,551 |
| Nov 2022 | $357.64 | $450.81 | $346.17 | $414.71 | +17.91% | 5,777,531 |
| Oct 2022 | $418.82 | $457.93 | $344.63 | $351.71 | -15.69% | 6,034,602 |
| Sep 2022 | $482.24 | $514.25 | $406.24 | $417.14 | -14.00% | 3,495,044 |
| Aug 2022 | $558.45 | $572.70 | $477.21 | $485.04 | -13.89% | 2,666,908 |
| Jul 2022 | $495.01 | $569.89 | $472.45 | $563.26 | +13.79% | 3,525,991 |
| Jun 2022 | $542.89 | $552.76 | $462.61 | $495.00 | -7.96% | 3,345,647 |
| May 2022 | $506.66 | $548.38 | $468.86 | $537.79 | +5.02% | 5,198,262 |
| Apr 2022 | $573.51 | $607.54 | $493.37 | $512.06 | -9.09% | 4,965,867 |
| Mar 2022 | $624.33 | $631.48 | $524.19 | $563.23 | -10.02% | 4,453,192 |
| Feb 2022 | $606.38 | $670.62 | $563.00 | $625.96 | +4.37% | 5,490,272 |
| Jan 2022 | $752.17 | $752.17 | $558.51 | $599.73 | -20.63% | 4,019,816 |
| Dec 2021 | $753.68 | $771.69 | $714.97 | $755.57 | +0.31% | 2,748,938 |
| Nov 2021 | $797.27 | $797.27 | $712.22 | $753.20 | -5.22% | 2,143,315 |
| Oct 2021 | $747.41 | $798.97 | $703.67 | $794.68 | +6.53% | 2,090,542 |
| Sep 2021 | $801.43 | $832.70 | $740.41 | $745.95 | -7.31% | 3,249,264 |
| Aug 2021 | $742.96 | $816.78 | $720.31 | $804.82 | +8.83% | 2,333,067 |
| Jul 2021 | $645.02 | $756.52 | $644.34 | $739.51 | +14.78% | 2,405,437 |
| Jun 2021 | $603.37 | $647.96 | $575.00 | $644.29 | +6.96% | 2,985,611 |
| May 2021 | $631.97 | $634.49 | $580.01 | $602.37 | -4.41% | 2,579,726 |
| Apr 2021 | $572.84 | $657.79 | $569.46 | $630.13 | +10.32% | 2,558,758 |
| Mar 2021 | $590.26 | $602.36 | $547.22 | $571.17 | -2.28% | 4,278,927 |
| Feb 2021 | $577.75 | $689.00 | $573.03 | $584.50 | +1.87% | 5,149,894 |
| Jan 2021 | $580.99 | $636.97 | $545.00 | $573.77 | -1.57% | 4,461,010 |
| Dec 2020 | $540.65 | $609.59 | $537.12 | $582.94 | +8.25% | 5,127,009 |
| Nov 2020 | $595.00 | $648.39 | $507.22 | $538.50 | -8.17% | 5,001,693 |
| Oct 2020 | $519.19 | $598.06 | $507.82 | $586.42 | +13.77% | 3,000,549 |
| Sep 2020 | $515.14 | $528.95 | $472.84 | $515.46 | +1.35% | 3,539,975 |
| Aug 2020 | $531.19 | $536.44 | $485.82 | $508.59 | -3.11% | 3,657,215 |
| Jul 2020 | $446.13 | $540.06 | $443.80 | $524.89 | +16.26% | 4,207,474 |
| Jun 2020 | $490.53 | $497.42 | $425.43 | $451.49 | -8.11% | 9,071,029 |
| May 2020 | $433.40 | $492.00 | $425.00 | $491.32 | +11.64% | 5,033,935 |
| Apr 2020 | $340.10 | $450.89 | $330.00 | $440.10 | +25.54% | 5,362,692 |
| Mar 2020 | $353.83 | $390.19 | $309.38 | $350.56 | -0.41% | 6,187,312 |
| Feb 2020 | $363.22 | $413.02 | $343.34 | $352.02 | -2.47% | 3,522,672 |
| Jan 2020 | $372.08 | $391.22 | $358.68 | $360.92 | -2.46% | 3,547,524 |
| Dec 2019 | $369.41 | $376.43 | $339.00 | $370.03 | +0.18% | 5,208,429 |
| Nov 2019 | $329.00 | $374.61 | $327.97 | $369.38 | +11.39% | 4,753,805 |
| Oct 2019 | $333.55 | $349.99 | $319.26 | $331.62 | -0.34% | 5,135,566 |
| Sep 2019 | $335.72 | $348.39 | $321.76 | $332.74 | -1.47% | 4,324,204 |
| Aug 2019 | $315.93 | $345.50 | $307.40 | $337.71 | +7.24% | 5,536,635 |
| Jul 2019 | $313.99 | $324.55 | $303.82 | $314.90 | +0.74% | 2,912,120 |
| Jun 2019 | $287.25 | $313.33 | $286.00 | $312.59 | +8.94% | 3,504,632 |
| May 2019 | $301.35 | $319.99 | $281.66 | $286.93 | -4.65% | 4,131,896 |
| Apr 2019 | $308.44 | $311.73 | $287.89 | $300.93 | -1.55% | 4,216,250 |
| Mar 2019 | $302.00 | $323.95 | $297.09 | $305.68 | +12.84% | 5,960,816 |
| Feb 2019 | $249.75 | $277.36 | $245.59 | $270.90 | +8.42% | 4,961,205 |
| Jan 2019 | $229.73 | $250.11 | $223.89 | $249.87 | +7.60% | 4,667,891 |
| Dec 2018 | $277.34 | $278.85 | $220.05 | $232.22 | -15.39% | 3,468,604 |
| Nov 2018 | $273.46 | $285.46 | $260.00 | $274.46 | +0.59% | 5,087,115 |
| Oct 2018 | $315.00 | $315.00 | $262.57 | $272.85 | -12.82% | 3,432,549 |
| Sep 2018 | $324.76 | $326.60 | $294.10 | $312.99 | -3.78% | 3,157,342 |
| Aug 2018 | $308.82 | $345.15 | $307.34 | $325.30 | +6.08% | 2,817,364 |
| Jul 2018 | $287.26 | $314.23 | $285.83 | $306.65 | +6.28% | 2,093,227 |
| Jun 2018 | $289.26 | $304.36 | $282.66 | $288.54 | +0.49% | 2,887,486 |
| May 2018 | $253.82 | $297.59 | $245.73 | $287.13 | +13.17% | 3,913,732 |
| Apr 2018 | $248.43 | $267.66 | $240.01 | $253.71 | +1.45% | 2,535,125 |
| Mar 2018 | $271.29 | $276.00 | $245.84 | $250.08 | -7.39% | 3,203,339 |
| Feb 2018 | $257.81 | $279.59 | $231.00 | $270.04 | +4.45% | 3,664,896 |
| Jan 2018 | $238.67 | $266.98 | $238.23 | $258.53 | +8.32% | 3,415,870 |
| Dec 2017 | $271.30 | $272.02 | $237.37 | $238.67 | -12.03% | 3,763,713 |
| Nov 2017 | $219.96 | $273.87 | $214.44 | $271.30 | +23.44% | 4,501,092 |
| Oct 2017 | $222.03 | $227.41 | $215.50 | $219.79 | -1.09% | 2,935,804 |
| Sep 2017 | $218.26 | $233.97 | $212.02 | $222.22 | +2.02% | 3,864,648 |
| Aug 2017 | $236.38 | $242.79 | $208.95 | $217.82 | -7.56% | 4,051,566 |
| Jul 2017 | $226.75 | $239.91 | $224.72 | $235.63 | +4.12% | 2,494,356 |
| Jun 2017 | $224.50 | $230.40 | $218.10 | $226.31 | +1.27% | 3,252,671 |
| May 2017 | $219.43 | $224.24 | $215.56 | $223.48 | +2.39% | 3,516,818 |
| Apr 2017 | $199.40 | $219.34 | $198.25 | $218.26 | +9.49% | 3,373,914 |
| Mar 2017 | $195.44 | $209.50 | $193.11 | $199.34 | +2.41% | 6,313,889 |
| Feb 2017 | $190.50 | $197.63 | $186.98 | $194.64 | +2.40% | 2,854,815 |
| Jan 2017 | $182.96 | $194.20 | $181.87 | $190.08 | +4.28% | 4,280,162 |
| Dec 2016 | $173.56 | $184.89 | $172.63 | $182.28 | +5.06% | 3,752,578 |
| Nov 2016 | $158.74 | $174.77 | $154.89 | $173.50 | +9.75% | 3,820,454 |
| Oct 2016 | $163.38 | $166.48 | $155.40 | $158.08 | -3.50% | 2,982,111 |
| Sep 2016 | $148.63 | $164.45 | $147.68 | $163.81 | +10.08% | 2,743,100 |
| Aug 2016 | $144.88 | $158.50 | $143.39 | $148.81 | +2.56% | 2,539,000 |
| Jul 2016 | $142.87 | $146.51 | $140.53 | $145.09 | +1.45% | 1,831,200 |
| Jun 2016 | $148.36 | $150.00 | $135.94 | $143.02 | -3.92% | 2,735,500 |
| May 2016 | $141.68 | $149.87 | $138.81 | $148.85 | +4.93% | 2,521,900 |
| Apr 2016 | $136.06 | $144.52 | $135.02 | $141.85 | +3.75% | 2,333,400 |
| Mar 2016 | $135.70 | $139.63 | $130.17 | $136.72 | +1.54% | 3,045,500 |
| Feb 2016 | $126.95 | $137.48 | $122.96 | $134.64 | +5.51% | 2,403,500 |
| Jan 2016 | $136.59 | $137.92 | $122.03 | $127.61 | -7.97% | 2,252,800 |
| Dec 2015 | $140.09 | $141.76 | $133.90 | $138.66 | -0.76% | 2,067,600 |
| Nov 2015 | $139.33 | $142.48 | $134.81 | $139.72 | +0.17% | 2,170,000 |
| Oct 2015 | $134.43 | $142.22 | $132.49 | $139.48 | +3.85% | 2,174,900 |
| Sep 2015 | $138.37 | $141.38 | $131.36 | $134.31 | -3.60% | 2,803,300 |
| Aug 2015 | $151.06 | $151.75 | $131.25 | $139.33 | -7.57% | 2,955,800 |
| Jul 2015 | $151.76 | $152.38 | $145.52 | $150.74 | +0.09% | 2,851,700 |
| Jun 2015 | $143.99 | $151.97 | $143.43 | $150.61 | +4.32% | 2,909,200 |
| May 2015 | $134.56 | $147.62 | $133.38 | $144.37 | +7.38% | 3,564,000 |
| Apr 2015 | $135.55 | $139.19 | $134.01 | $134.45 | -0.54% | 2,970,600 |
| Mar 2015 | $127.40 | $137.23 | $125.83 | $135.18 | +6.29% | 5,306,900 |
| Feb 2015 | $113.83 | $127.64 | $113.01 | $127.18 | +11.10% | 2,364,500 |
| Jan 2015 | $121.47 | $122.35 | $112.51 | $114.47 | -5.05% | 2,459,300 |
| Dec 2014 | $118.83 | $122.93 | $114.98 | $120.56 | +1.49% | 2,762,700 |
| Nov 2014 | $113.15 | $120.50 | $102.71 | $118.79 | +5.29% | 2,139,500 |
| Oct 2014 | $113.39 | $115.28 | $105.30 | $112.82 | -0.51% | 1,991,900 |
| Sep 2014 | $120.04 | $121.45 | $113.37 | $113.40 | -5.70% | 1,248,700 |
| Aug 2014 | $114.71 | $122.73 | $113.72 | $120.26 | +4.58% | 1,415,400 |
| Jul 2014 | $120.00 | $121.73 | $114.76 | $114.99 | -3.94% | 1,485,000 |
| Jun 2014 | $120.35 | $123.20 | $118.10 | $119.71 | -0.84% | 1,427,700 |
| May 2014 | $123.65 | $125.13 | $119.06 | $120.73 | -2.01% | 1,348,500 |
| Apr 2014 | $128.34 | $131.42 | $117.98 | $123.21 | -3.83% | 1,849,900 |
| Mar 2014 | $128.15 | $130.89 | $124.13 | $128.12 | -1.23% | 2,259,200 |
| Feb 2014 | $126.92 | $134.13 | $122.92 | $129.72 | +2.05% | 2,076,500 |
| Jan 2014 | $123.93 | $133.00 | $120.43 | $127.12 | +2.84% | 3,036,000 |
| Dec 2013 | $122.12 | $124.61 | $118.61 | $123.61 | +0.81% | 2,014,300 |
| Nov 2013 | $124.23 | $125.00 | $119.62 | $122.62 | -0.73% | 1,160,000 |
| Oct 2013 | $116.03 | $124.99 | $115.25 | $123.52 | +5.07% | 1,685,800 |
| Sep 2013 | $115.30 | $118.48 | $113.02 | $117.56 | +3.11% | 1,985,000 |
| Aug 2013 | $122.48 | $126.98 | $113.33 | $114.01 | -6.54% | 1,342,500 |
| Jul 2013 | $112.22 | $122.70 | $111.49 | $121.99 | +8.73% | 979,500 |
| Jun 2013 | $113.49 | $114.95 | $110.26 | $112.20 | -1.30% | 1,323,500 |
| May 2013 | $119.12 | $124.04 | $110.02 | $113.68 | -5.07% | 2,362,400 |
| Apr 2013 | $127.17 | $127.17 | $118.02 | $119.75 | -4.96% | 1,229,800 |
| Mar 2013 | $122.79 | $126.50 | $120.46 | $126.00 | +2.27% | 1,508,500 |
| Feb 2013 | $114.59 | $124.18 | $113.69 | $123.20 | +8.27% | 1,613,200 |
| Jan 2013 | $106.47 | $116.48 | $106.10 | $113.79 | +8.32% | 1,119,100 |
| Dec 2012 | $104.76 | $108.87 | $103.20 | $105.05 | +0.54% | 1,232,000 |
| Nov 2012 | $100.92 | $106.10 | $99.65 | $104.49 | +3.10% | 906,900 |
| Oct 2012 | $107.01 | $109.93 | $99.00 | $101.35 | -5.03% | 816,900 |
| Sep 2012 | $100.19 | $109.62 | $99.02 | $106.72 | +6.32% | 1,064,000 |
| Aug 2012 | $96.67 | $104.85 | $93.37 | $100.38 | +4.33% | 1,036,000 |
| Jul 2012 | $99.96 | $101.32 | $91.52 | $96.21 | -3.80% | 1,381,400 |
| Jun 2012 | $98.14 | $102.96 | $95.05 | $100.01 | +0.40% | 1,845,300 |
| May 2012 | $107.92 | $109.48 | $97.54 | $99.61 | -7.76% | 1,789,000 |
| Apr 2012 | $103.24 | $118.00 | $102.70 | $107.99 | +4.15% | 2,787,300 |
| Mar 2012 | $102.31 | $106.28 | $99.63 | $103.69 | +1.74% | 1,462,900 |
| Feb 2012 | $102.30 | $106.91 | $99.75 | $101.92 | +0.35% | 1,278,200 |
| Jan 2012 | $97.99 | $105.75 | $96.19 | $101.56 | +5.75% | 1,608,100 |
| Dec 2011 | $93.47 | $99.02 | $88.86 | $96.04 | +1.85% | 1,490,800 |
| Nov 2011 | $95.78 | $102.68 | $89.67 | $94.30 | -5.27% | 1,115,000 |
| Oct 2011 | $90.04 | $103.22 | $87.98 | $99.55 | +9.67% | 1,420,000 |
| Sep 2011 | $100.40 | $101.99 | $84.02 | $90.77 | -9.54% | 2,031,100 |
| Aug 2011 | $109.60 | $109.71 | $93.21 | $100.34 | -7.94% | 3,341,700 |
| Jul 2011 | $119.69 | $122.39 | $106.77 | $109.00 | -8.68% | 1,394,000 |
| Jun 2011 | $124.40 | $124.60 | $115.77 | $119.36 | -4.07% | 1,277,300 |
| May 2011 | $125.12 | $126.98 | $120.36 | $124.43 | -0.55% | 1,715,800 |
| Apr 2011 | $120.48 | $126.26 | $115.98 | $125.12 | +4.15% | 1,391,000 |
| Mar 2011 | $113.59 | $120.18 | $111.45 | $120.14 | +5.24% | 1,621,900 |
| Feb 2011 | $109.68 | $114.99 | $107.00 | $114.16 | +4.85% | 1,368,400 |
| Jan 2011 | $104.30 | $112.10 | $104.30 | $108.88 | +4.84% | 1,206,300 |
| Dec 2010 | $94.44 | $105.60 | $93.45 | $103.85 | +11.25% | 1,018,300 |
| Nov 2010 | $90.89 | $97.83 | $89.81 | $93.35 | +3.01% | 1,081,300 |
| Oct 2010 | $90.96 | $92.78 | $89.02 | $90.62 | +0.12% | 965,800 |
| Sep 2010 | $83.51 | $91.81 | $82.41 | $90.51 | +9.67% | 985,400 |
| Aug 2010 | $89.83 | $93.36 | $80.00 | $82.53 | -7.06% | 1,571,800 |
| Jul 2010 | $86.06 | $91.56 | $83.71 | $88.80 | +2.67% | 1,725,200 |
| Jun 2010 | $92.81 | $94.14 | $85.57 | $86.49 | -7.57% | 2,545,100 |
| May 2010 | $111.84 | $125.01 | $88.00 | $93.57 | -16.22% | 2,687,300 |
| Apr 2010 | $103.58 | $112.68 | $103.32 | $111.69 | +7.89% | 1,133,600 |
| Mar 2010 | $94.32 | $104.44 | $94.18 | $103.52 | +10.85% | 1,291,600 |
| Feb 2010 | $93.58 | $97.97 | $89.96 | $93.39 | +0.23% | 1,113,000 |
| Jan 2010 | $97.33 | $102.99 | $89.82 | $93.18 | -3.40% | 1,184,500 |
| Dec 2009 | $97.04 | $99.59 | $95.08 | $96.46 | -0.24% | 1,213,800 |
| Nov 2009 | $89.42 | $100.99 | $88.25 | $96.69 | +8.17% | 1,319,400 |
| Oct 2009 | $91.20 | $94.38 | $88.16 | $89.39 | -2.71% | 1,475,200 |
| Sep 2009 | $85.98 | $96.20 | $84.50 | $91.88 | +6.52% | 2,071,700 |
| Aug 2009 | $77.64 | $87.10 | $76.00 | $86.26 | +11.39% | 1,817,500 |
| Jul 2009 | $75.13 | $78.30 | $68.90 | $77.44 | +2.60% | 2,114,000 |
| Jun 2009 | $74.00 | $80.61 | $72.46 | $75.48 | +1.40% | 4,325,500 |
| May 2009 | $69.24 | $79.75 | $68.81 | $74.44 | +6.82% | 1,942,100 |
| Apr 2009 | $64.65 | $72.64 | $63.31 | $69.69 | +5.75% | 1,993,600 |
| Mar 2009 | $55.02 | $69.22 | $52.43 | $65.90 | +18.31% | 2,940,700 |
| Feb 2009 | $63.13 | $68.82 | $51.33 | $55.70 | -12.34% | 2,331,500 |
| Jan 2009 | $75.60 | $75.60 | $60.52 | $63.54 | -15.63% | 2,540,000 |
| Dec 2008 | $72.80 | $76.50 | $64.29 | $75.31 | +1.55% | 3,144,700 |
| Nov 2008 | $85.03 | $89.50 | $60.51 | $74.16 | -13.14% | 6,243,300 |
| Oct 2008 | $98.01 | $99.57 | $64.40 | $85.38 | -13.86% | 2,627,200 |
| Sep 2008 | $107.79 | $109.20 | $91.70 | $99.12 | -7.88% | 2,323,200 |
| Aug 2008 | $89.42 | $109.50 | $88.56 | $107.60 | +20.76% | 2,532,100 |
| Jul 2008 | $80.99 | $90.00 | $75.65 | $89.10 | +10.15% | 2,056,700 |
| Jun 2008 | $88.58 | $90.99 | $80.00 | $80.89 | -9.60% | 2,013,500 |
| May 2008 | $83.46 | $91.30 | $83.00 | $89.48 | +7.35% | 2,030,500 |
| Apr 2008 | $88.86 | $93.20 | $77.52 | $83.35 | -6.30% | 1,956,300 |
| Mar 2008 | $93.35 | $94.35 | $86.50 | $88.95 | -5.81% | 1,995,100 |
| Feb 2008 | $94.33 | $96.23 | $82.50 | $94.44 | -0.37% | 1,923,700 |
| Jan 2008 | $103.25 | $104.99 | $87.50 | $94.79 | -8.52% | 1,894,900 |
| Dec 2007 | $101.85 | $109.99 | $91.65 | $103.62 | +2.69% | 2,055,800 |
| Nov 2007 | $96.58 | $115.23 | $90.00 | $100.91 | +4.48% | 2,437,900 |
| Oct 2007 | $90.10 | $98.58 | $89.91 | $96.58 | +6.72% | 2,296,200 |
| Sep 2007 | $84.13 | $94.00 | $82.01 | $90.50 | +7.33% | 1,965,600 |
| Aug 2007 | $73.66 | $88.99 | $73.05 | $84.32 | +13.70% | 2,182,500 |
| Jul 2007 | $75.81 | $80.00 | $73.56 | $74.16 | -1.87% | 2,139,900 |
| Jun 2007 | $74.94 | $76.22 | $70.24 | $75.57 | +1.16% | 1,682,800 |
| May 2007 | $70.79 | $75.50 | $68.18 | $74.70 | +5.55% | 1,780,400 |
| Apr 2007 | $70.03 | $71.99 | $67.53 | $70.77 | +1.33% | 1,321,100 |
| Mar 2007 | $70.37 | $73.24 | $66.80 | $69.84 | -1.51% | 1,798,900 |
| Feb 2007 | $86.27 | $88.54 | $67.04 | $70.91 | -17.58% | 1,477,700 |
| Jan 2007 | $81.77 | $86.27 | $80.65 | $86.04 | +4.27% | 1,058,400 |
| Dec 2006 | $78.75 | $84.34 | $77.20 | $82.52 | +4.52% | 1,215,700 |
| Nov 2006 | $73.60 | $81.89 | $71.25 | $78.95 | +7.53% | 1,038,600 |
| Oct 2006 | $70.73 | $75.32 | $68.00 | $73.42 | +3.80% | 994,300 |
| Sep 2006 | $73.52 | $74.05 | $69.16 | $70.73 | -3.65% | 1,606,800 |
| Aug 2006 | $65.66 | $74.48 | $63.48 | $73.41 | +11.41% | 1,549,000 |
| Jul 2006 | $64.74 | $67.98 | $62.66 | $65.89 | +1.46% | 1,202,800 |
| Jun 2006 | $66.40 | $67.13 | $62.83 | $64.94 | -2.23% | 1,972,900 |
| May 2006 | $64.90 | $75.00 | $63.25 | $66.42 | +1.54% | 2,684,600 |
| Apr 2006 | $62.00 | $68.00 | $61.65 | $65.41 | +4.91% | 1,773,800 |
| Mar 2006 | $57.44 | $62.35 | $57.24 | $62.35 | +8.79% | 2,197,600 |
| Feb 2006 | $67.30 | $67.87 | $57.10 | $57.31 | -14.97% | 1,442,000 |
| Jan 2006 | $64.70 | $68.96 | $63.91 | $67.40 | +3.00% | 1,163,400 |
| Dec 2005 | $58.96 | $66.90 | $58.47 | $65.44 | +12.02% | 1,807,400 |
| Nov 2005 | $57.55 | $61.75 | $55.32 | $58.42 | -0.17% | 1,034,500 |
| Oct 2005 | $54.80 | $58.70 | $51.96 | $58.52 | +6.42% | 1,209,700 |
| Sep 2005 | $55.36 | $57.70 | $50.25 | $54.99 | -0.38% | 1,327,300 |
| Aug 2005 | $59.95 | $62.58 | $53.80 | $55.20 | -8.05% | 1,662,500 |
| Jul 2005 | $59.20 | $60.50 | $57.61 | $60.03 | +1.38% | 1,013,700 |
| Jun 2005 | $53.88 | $59.90 | $53.21 | $59.21 | +9.89% | 1,829,000 |
| May 2005 | $48.80 | $54.49 | $48.02 | $53.88 | +11.46% | 2,174,200 |
| Apr 2005 | $48.95 | $50.66 | $47.20 | $48.34 | -0.76% | 1,509,400 |
| Mar 2005 | $49.46 | $50.41 | $46.54 | $48.71 | -0.41% | 2,189,600 |
| Feb 2005 | $59.00 | $59.00 | $47.25 | $48.91 | -16.81% | 1,749,900 |
| Jan 2005 | $58.50 | $59.00 | $55.40 | $58.79 | +2.48% | 1,170,400 |
| Dec 2004 | $56.55 | $59.99 | $55.62 | $57.37 | +1.18% | 1,295,800 |
| Nov 2004 | $53.50 | $57.94 | $50.61 | $56.70 | +9.00% | 2,232,000 |
| Oct 2004 | $51.35 | $53.85 | $50.00 | $52.02 | +1.80% | 883,400 |
| Sep 2004 | $50.30 | $52.81 | $50.00 | $51.10 | +1.51% | 946,000 |
| Aug 2004 | $52.70 | $53.54 | $49.00 | $50.34 | -3.93% | 989,900 |
| Jul 2004 | $58.61 | $58.95 | $51.30 | $52.40 | -10.98% | 1,408,600 |
| Jun 2004 | $56.00 | $60.00 | $54.77 | $58.86 | +4.88% | 3,036,100 |
| May 2004 | $58.75 | $59.00 | $55.20 | $56.12 | -4.23% | 1,202,500 |
| Apr 2004 | $56.39 | $62.48 | $56.00 | $58.60 | +3.96% | 1,777,700 |
| Mar 2004 | $52.08 | $59.40 | $52.08 | $56.37 | +8.20% | 3,158,600 |
| Feb 2004 | $54.00 | $55.42 | $51.73 | $52.10 | -3.61% | 1,546,400 |
| Jan 2004 | $57.50 | $60.71 | $53.61 | $54.05 | -6.28% | 2,901,500 |
| Dec 2003 | $51.25 | $65.00 | $48.81 | $57.67 | +12.53% | 7,254,600 |
| Nov 2003 | $52.00 | $54.49 | $50.10 | $51.25 | -1.91% | 1,571,600 |
| Oct 2003 | $51.00 | $54.26 | $50.75 | $52.25 | +2.45% | 1,630,600 |
| Sep 2003 | $51.11 | $54.30 | $48.52 | $51.00 | -0.29% | 3,238,100 |
| Aug 2003 | $55.85 | $56.00 | $50.48 | $51.15 | -8.66% | 2,337,400 |
| Jul 2003 | $55.60 | $62.50 | $53.35 | $56.00 | +1.17% | 3,579,000 |
| Jun 2003 | $59.25 | $62.85 | $53.90 | $55.35 | -6.19% | 3,517,100 |
| May 2003 | $47.50 | $60.00 | $46.50 | $59.00 | +26.20% | 5,716,000 |
| Apr 2003 | $35.75 | $48.45 | $35.35 | $46.75 | +30.77% | 2,400,300 |
| Mar 2003 | $35.86 | $36.84 | $33.55 | $35.75 | -0.56% | 1,589,000 |
| Feb 2003 | $35.00 | $39.00 | $33.20 | $35.95 | +1.55% | 1,966,700 |
| Jan 2003 | $38.45 | $39.11 | $33.88 | $35.40 | -8.53% | 2,347,100 |
| Dec 2002 | $39.60 | $43.85 | $38.30 | $38.70 | -2.03% | 2,396,200 |
| Nov 2002 | $42.61 | $45.90 | $39.50 | $39.50 | -7.30% | 2,346,700 |
| Oct 2002 | $37.66 | $42.99 | $36.25 | $42.61 | +13.14% | 2,769,500 |
| Sep 2002 | $41.25 | $45.99 | $37.01 | $37.66 | -10.23% | 3,115,400 |
| Aug 2002 | $41.50 | $44.50 | $38.40 | $41.95 | +1.85% | 3,105,800 |
| Jul 2002 | $45.51 | $45.51 | $34.90 | $41.19 | -9.49% | 3,800,400 |
| Jun 2002 | $44.35 | $51.00 | $38.75 | $45.51 | +2.82% | 3,404,400 |
| May 2002 | $48.30 | $50.00 | $41.40 | $44.26 | -8.36% | 3,635,600 |
| Apr 2002 | $37.20 | $48.30 | $36.30 | $48.30 | +28.63% | 1,847,000 |
| Mar 2002 | $32.73 | $38.00 | $32.00 | $37.55 | +14.74% | 1,476,100 |
| Feb 2002 | $28.59 | $34.38 | $28.38 | $32.73 | +14.46% | 1,067,400 |
| Jan 2002 | $31.25 | $31.38 | $27.45 | $28.59 | -9.67% | 714,000 |
| Dec 2001 | $31.00 | $33.00 | $30.63 | $31.65 | +0.32% | 721,200 |
| Nov 2001 | $31.25 | $32.00 | $29.50 | $31.55 | +1.77% | 758,200 |
| Oct 2001 | $23.63 | $32.00 | $22.85 | $31.00 | +31.91% | 1,229,200 |
| Sep 2001 | $27.63 | $28.88 | $21.00 | $23.50 | -15.70% | 577,000 |
| Aug 2001 | $24.38 | $28.00 | $23.95 | $27.88 | +13.80% | 839,800 |
| Jul 2001 | $25.05 | $25.35 | $22.85 | $24.50 | -1.63% | 450,600 |
| Jun 2001 | $21.68 | $25.65 | $21.63 | $24.90 | +15.55% | 561,800 |
| May 2001 | $20.70 | $25.15 | $20.70 | $21.55 | +5.12% | 1,639,400 |
| Apr 2001 | $17.88 | $20.67 | $17.05 | $20.50 | +13.89% | 472,200 |
| Mar 2001 | $17.60 | $20.49 | $16.24 | $18.00 | +2.71% | 515,600 |
| Feb 2001 | $20.85 | $21.00 | $17.50 | $17.53 | -15.95% | 555,400 |
| Jan 2001 | $16.00 | $20.85 | $14.88 | $20.85 | +31.13% | 1,090,800 |
| Dec 2000 | $16.50 | $16.50 | $15.25 | $15.90 | -3.64% | 299,000 |
| Nov 2000 | $14.94 | $17.00 | $14.11 | $16.50 | +10.37% | 373,200 |
| Oct 2000 | $11.15 | $15.15 | $11.10 | $14.95 | +32.83% | 706,800 |
| Sep 2000 | $12.25 | $12.25 | $10.50 | $11.26 | -8.59% | 289,600 |
| Aug 2000 | $11.75 | $12.38 | $11.19 | $12.31 | +4.23% | 457,800 |
| Jul 2000 | $12.38 | $12.50 | $11.75 | $11.81 | -5.50% | 366,000 |
| Jun 2000 | $11.63 | $12.50 | $10.50 | $12.50 | +7.82% | 512,400 |
| May 2000 | $12.88 | $13.56 | $11.59 | $11.59 | -9.07% | 450,400 |
| Apr 2000 | $13.63 | $13.63 | $12.38 | $12.75 | -6.42% | 268,800 |
| Mar 2000 | $16.38 | $16.50 | $13.63 | $13.63 | -17.11% | 1,156,800 |
| Feb 2000 | $11.50 | $16.50 | $11.50 | $16.44 | +42.55% | 756,800 |
| Jan 2000 | $11.69 | $11.69 | $10.63 | $11.53 | -1.34% | 877,400 |
| Dec 1999 | $12.34 | $12.63 | $11.25 | $11.69 | -5.32% | 487,600 |
| Nov 1999 | $12.13 | $12.50 | $11.75 | $12.34 | +2.87% | 199,800 |
| Oct 1999 | $13.75 | $13.75 | $11.56 | $12.00 | -12.33% | 208,200 |
| Sep 1999 | $13.38 | $14.00 | $12.81 | $13.69 | +2.82% | 303,000 |
| Aug 1999 | $13.56 | $13.75 | $13.03 | $13.31 | -2.52% | 249,000 |
| Jul 1999 | $13.19 | $13.88 | $12.81 | $13.66 | +4.55% | 289,200 |
| Jun 1999 | $14.06 | $14.50 | $13.06 | $13.06 | -7.32% | 516,000 |
| May 1999 | $14.06 | $14.31 | $13.13 | $14.09 | +0.67% | 334,800 |
| Apr 1999 | $10.19 | $14.50 | $10.19 | $14.00 | +38.27% | 524,000 |
| Mar 1999 | $10.13 | $10.75 | $10.00 | $10.13 | +1.25% | 376,200 |
| Feb 1999 | $10.38 | $10.88 | $9.44 | $10.00 | -3.03% | 845,400 |
| Jan 1999 | $10.56 | $10.75 | $9.63 | $10.31 | -1.79% | 521,200 |
| Dec 1998 | $10.53 | $11.38 | $9.75 | $10.50 | -1.18% | 824,800 |
| Nov 1998 | $10.97 | $11.89 | $10.44 | $10.63 | -3.68% | 531,400 |
| Oct 1998 | $12.06 | $12.38 | $10.50 | $11.03 | -9.49% | 410,000 |
| Sep 1998 | $12.13 | $13.00 | $11.66 | $12.19 | +1.56% | 489,600 |
| Aug 1998 | $13.63 | $15.00 | $12.00 | $12.00 | -12.33% | 524,600 |
| Jul 1998 | $15.38 | $15.94 | $13.25 | $13.69 | -10.61% | 499,800 |
| Jun 1998 | $15.78 | $16.88 | $15.16 | $15.31 | -3.54% | 704,800 |
| May 1998 | $15.00 | $17.06 | $14.94 | $15.88 | +7.17% | 1,122,000 |
| Apr 1998 | $13.44 | $14.81 | $13.22 | $14.81 | +10.23% | 651,000 |
| Mar 1998 | $12.75 | $13.50 | $12.53 | $13.44 | +4.88% | 605,000 |
| Feb 1998 | $12.22 | $12.94 | $11.50 | $12.81 | +5.13% | 711,400 |
| Jan 1998 | $13.00 | $13.25 | $11.25 | $12.19 | -6.70% | 367,800 |
| Dec 1997 | $12.50 | $13.19 | $11.72 | $13.06 | +3.72% | 741,200 |
| Nov 1997 | $12.25 | $13.00 | $12.19 | $12.59 | +1.77% | 960,800 |
| Oct 1997 | $14.94 | $15.13 | $12.38 | $12.38 | -17.50% | 964,000 |
| Sep 1997 | $14.19 | $15.38 | $13.94 | $15.00 | +6.43% | 538,000 |
| Aug 1997 | $14.00 | $14.13 | $13.50 | $14.09 | -0.66% | 931,200 |
| Jul 1997 | $13.00 | $14.19 | $13.00 | $14.19 | +8.87% | 583,600 |
| Jun 1997 | $12.75 | $13.97 | $12.44 | $13.03 | +2.21% | 1,110,000 |
| May 1997 | $11.88 | $13.00 | $11.75 | $12.75 | +6.81% | 1,151,200 |
| Apr 1997 | $12.63 | $12.81 | $11.69 | $11.94 | -6.37% | 1,187,000 |
| Mar 1997 | $13.25 | $14.13 | $12.75 | $12.75 | -3.32% | 1,000,400 |
| Feb 1997 | $16.00 | $16.75 | $12.94 | $13.19 | -17.58% | 1,495,400 |
| Jan 1997 | $14.94 | $16.63 | $14.69 | $16.00 | +6.67% | 662,200 |
| Dec 1996 | $14.81 | $15.06 | $13.69 | $15.00 | +0.42% | 783,200 |
| Nov 1996 | $13.38 | $15.50 | $12.63 | $14.94 | +23.20% | 918,400 |
| Oct 1996 | $14.31 | $15.00 | $12.00 | $12.13 | -15.65% | 984,000 |
| Sep 1996 | $13.81 | $14.44 | $13.63 | $14.38 | +2.68% | 737,000 |
| Aug 1996 | $14.31 | $15.38 | $13.31 | $14.00 | -5.08% | 1,023,600 |
| Jul 1996 | $17.75 | $18.31 | $13.31 | $14.75 | -17.77% | 1,347,400 |
| Jun 1996 | $17.31 | $18.50 | $16.75 | $17.94 | +4.49% | 726,200 |
| May 1996 | $15.75 | $17.67 | $15.75 | $17.17 | +10.75% | 1,240,800 |
| Apr 1996 | $14.08 | $15.83 | $14.00 | $15.50 | +10.71% | 1,027,200 |
| Mar 1996 | $12.92 | $14.00 | $12.58 | $14.00 | +8.74% | 1,436,100 |
| Feb 1996 | $13.42 | $13.63 | $12.46 | $12.88 | -4.04% | 1,152,300 |
| Jan 1996 | $14.17 | $14.25 | $12.75 | $13.42 | -5.29% | 633,300 |
| Dec 1995 | $13.67 | $14.21 | $12.88 | $14.17 | +3.03% | 696,600 |
| Nov 1995 | $12.42 | $13.92 | $12.33 | $13.75 | +8.55% | 589,800 |
| Oct 1995 | $13.46 | $13.46 | $12.58 | $12.67 | -5.59% | 561,300 |
| Sep 1995 | $12.75 | $13.50 | $12.67 | $13.42 | +5.23% | 871,500 |
| Aug 1995 | $12.67 | $13.58 | $12.00 | $12.75 | +0.66% | 1,368,000 |
| Jul 1995 | $12.00 | $13.13 | $11.75 | $12.67 | +5.56% | 1,343,700 |
| Jun 1995 | $10.00 | $12.08 | $10.00 | $12.00 | +20.00% | 783,300 |
| May 1995 | $9.75 | $11.83 | $9.71 | $10.00 | +3.90% | 1,226,100 |
| Apr 1995 | $9.58 | $9.71 | $9.17 | $9.63 | +0.44% | 975,300 |
| Mar 1995 | $9.25 | $9.63 | $8.29 | $9.58 | +3.60% | 1,119,300 |
| Feb 1995 | $8.96 | $9.29 | $8.71 | $9.25 | +3.74% | 1,326,000 |
| Jan 1995 | $9.13 | $9.25 | $8.38 | $8.92 | -3.60% | 582,000 |
| Dec 1994 | $9.33 | $9.46 | $8.38 | $9.25 | 0.00% | 759,300 |
| Nov 1994 | $8.71 | $9.75 | $8.71 | $9.25 | +6.73% | 1,570,800 |
| Oct 1994 | $8.17 | $8.79 | $8.00 | $8.67 | +7.77% | 1,502,700 |
| Sep 1994 | $8.13 | $8.17 | $7.71 | $8.04 | -1.53% | 1,049,400 |
| Aug 1994 | $6.13 | $8.29 | $5.88 | $8.17 | +33.33% | 3,446,400 |
| Jul 1994 | $6.00 | $6.33 | $6.00 | $6.13 | +1.38% | 734,400 |
| Jun 1994 | $5.79 | $6.17 | $5.58 | $6.04 | +3.57% | 798,300 |
| May 1994 | $5.88 | $6.46 | $5.63 | $5.83 | +0.72% | 908,100 |
| Apr 1994 | $4.21 | $6.00 | $4.21 | $5.79 | +32.38% | 526,800 |
| Mar 1994 | $4.54 | $4.63 | $4.29 | $4.38 | -2.78% | 496,200 |
| Feb 1994 | $3.71 | $4.71 | $3.67 | $4.50 | +20.00% | 521,400 |
| Jan 1994 | $3.42 | $4.17 | $3.42 | $3.75 | +12.50% | 759,600 |
| Dec 1993 | $3.75 | $3.83 | $3.33 | $3.33 | -13.04% | 1,239,000 |
| Nov 1993 | $4.17 | $4.17 | $3.79 | $3.83 | -8.91% | 702,000 |
| Oct 1993 | $4.50 | $4.67 | $4.17 | $4.21 | -7.34% | 693,000 |
| Sep 1993 | $4.71 | $4.75 | $4.46 | $4.54 | -1.80% | 493,200 |
| Aug 1993 | $4.75 | $4.79 | $4.46 | $4.63 | -3.48% | 607,800 |
| Jul 1993 | $4.92 | $5.13 | $4.75 | $4.79 | -2.54% | 423,900 |
| Jun 1993 | $4.63 | $4.96 | $4.46 | $4.92 | +7.27% | 616,800 |
| May 1993 | $4.71 | $4.75 | $4.50 | $4.58 | -1.79% | 335,700 |
| Apr 1993 | $5.42 | $5.46 | $4.50 | $4.67 | -14.50% | 744,300 |
| Mar 1993 | $5.42 | $5.88 | $5.33 | $5.46 | +0.77% | 688,800 |
| Feb 1993 | $5.92 | $5.96 | $5.25 | $5.42 | -8.45% | 303,000 |
| Jan 1993 | $5.75 | $5.96 | $5.50 | $5.92 | +3.65% | 403,500 |
| Dec 1992 | $6.04 | $6.04 | $5.58 | $5.71 | -4.86% | 456,900 |
| Nov 1992 | $5.58 | $6.17 | $5.33 | $6.00 | +9.09% | 369,300 |
| Oct 1992 | $5.79 | $5.79 | $5.42 | $5.50 | -5.71% | 527,700 |
| Sep 1992 | $6.42 | $6.46 | $5.83 | $5.83 | -9.68% | 128,700 |
| Aug 1992 | $6.75 | $6.92 | $6.33 | $6.46 | -3.73% | 514,500 |
| Jul 1992 | $6.33 | $6.71 | $6.21 | $6.71 | +9.52% | 460,200 |
| Jun 1992 | $6.42 | $7.13 | $5.83 | $6.13 | -5.77% | 418,800 |
| May 1992 | $6.00 | $6.75 | $6.00 | $6.50 | +8.33% | 262,800 |
| Apr 1992 | $5.83 | $6.00 | $5.29 | $6.00 | +2.13% | 309,600 |
| Mar 1992 | $6.04 | $6.08 | $5.63 | $5.88 | -3.42% | 419,700 |
| Feb 1992 | $6.88 | $6.96 | $6.00 | $6.08 | -11.52% | 283,200 |
| Jan 1992 | $6.63 | $6.88 | $6.33 | $6.88 | +4.43% | 753,000 |
| Dec 1991 | $6.08 | $6.67 | $5.96 | $6.58 | +8.22% | 428,100 |
| Nov 1991 | $5.92 | $6.29 | $5.83 | $6.08 | +2.82% | 433,200 |
| Oct 1991 | $6.58 | $6.96 | $5.75 | $5.92 | -9.55% | 512,700 |
| Sep 1991 | $6.42 | $6.54 | $6.08 | $6.54 | +1.95% | 361,200 |
| Aug 1991 | $7.21 | $7.25 | $6.00 | $6.42 | -9.94% | 1,083,600 |
| Jul 1991 | $7.75 | $7.83 | $7.13 | $7.13 | -7.57% | 342,000 |
| Jun 1991 | $7.92 | $8.08 | $7.67 | $7.71 | -2.63% | 737,400 |
| May 1991 | $8.42 | $8.42 | $7.00 | $7.92 | -6.86% | 714,300 |
| Apr 1991 | $9.08 | $9.25 | $8.04 | $8.50 | -6.42% | 926,400 |
| Mar 1991 | $7.83 | $9.13 | $7.67 | $9.08 | +15.34% | 1,159,800 |
| Feb 1991 | $6.00 | $7.92 | $6.00 | $7.88 | +31.25% | 774,900 |
| Jan 1991 | $6.17 | $6.17 | $5.54 | $6.00 | -2.70% | 242,700 |
| Dec 1990 | $5.42 | $6.17 | $5.17 | $6.17 | +13.85% | 387,300 |
| Nov 1990 | $4.83 | $5.54 | $4.75 | $5.42 | +12.07% | 114,600 |
| Oct 1990 | $4.21 | $4.83 | $4.17 | $4.83 | +14.85% | 204,300 |
| Sep 1990 | $4.96 | $5.04 | $4.21 | $4.21 | -15.13% | 196,500 |
| Aug 1990 | $6.58 | $6.58 | $4.92 | $4.96 | -24.68% | 632,400 |
| Jul 1990 | $7.54 | $7.71 | $6.38 | $6.58 | -12.71% | 405,600 |
| Jun 1990 | $6.67 | $7.54 | $6.46 | $7.54 | +12.42% | 747,300 |
| May 1990 | $6.25 | $7.00 | $6.21 | $6.71 | +5.92% | 470,400 |
| Apr 1990 | $6.58 | $6.58 | $5.96 | $6.33 | -3.80% | 363,000 |
| Mar 1990 | $5.75 | $6.58 | $5.63 | $6.58 | +14.49% | 564,300 |
| Feb 1990 | $5.13 | $5.92 | $5.13 | $5.75 | +13.12% | 385,200 |
| Jan 1990 | $5.33 | $5.67 | $5.08 | $5.08 | -4.69% | 188,700 |
| Dec 1989 | $5.17 | $5.38 | $4.96 | $5.33 | +3.22% | 418,800 |
| Nov 1989 | $5.67 | $5.67 | $4.96 | $5.17 | -7.46% | 313,800 |
| Oct 1989 | $6.17 | $6.25 | $5.42 | $5.58 | -9.46% | 285,300 |
| Sep 1989 | $5.79 | $6.17 | $5.54 | $6.17 | +5.72% | 261,600 |
| Aug 1989 | $5.00 | $6.00 | $4.96 | $5.83 | +16.67% | 454,200 |
| Jul 1989 | $4.96 | $5.04 | $4.71 | $5.00 | +0.84% | 408,300 |
| Jun 1989 | $5.96 | $6.00 | $4.83 | $4.96 | -16.78% | 565,800 |
| May 1989 | $6.25 | $6.25 | $5.67 | $5.96 | -4.67% | 354,900 |
| Apr 1989 | $6.50 | $6.54 | $6.21 | $6.25 | -4.46% | 329,100 |
| Mar 1989 | $5.75 | $6.67 | $5.67 | $6.54 | +13.77% | 1,260,000 |
| Feb 1989 | $5.92 | $5.96 | $5.67 | $5.75 | -2.82% | 291,000 |
| Jan 1989 | $5.71 | $6.04 | $5.50 | $5.92 | +4.41% | 393,900 |
| Dec 1988 | $6.00 | $6.17 | $5.58 | $5.67 | -5.56% | 235,200 |
| Nov 1988 | $6.96 | $7.04 | $5.83 | $6.00 | -13.25% | 334,800 |
| Oct 1988 | $7.29 | $7.29 | $6.88 | $6.92 | -5.14% | 142,500 |
| Sep 1988 | $6.38 | $7.29 | $6.25 | $7.29 | +14.38% | 241,500 |
| Aug 1988 | $6.38 | $6.58 | $6.29 | $6.38 | 0.00% | 397,800 |
| Jul 1988 | $7.42 | $7.75 | $6.38 | $6.38 | -14.05% | 795,900 |
| Jun 1988 | $6.67 | $7.42 | $6.67 | $7.42 | +11.95% | 408,000 |
| May 1988 | $6.92 | $6.96 | $6.50 | $6.63 | -4.22% | 273,000 |
| Apr 1988 | $6.13 | $6.92 | $5.96 | $6.92 | +12.93% | 312,000 |
| Mar 1988 | $5.79 | $6.50 | $5.75 | $6.13 | +5.75% | 319,500 |
| Feb 1988 | $4.92 | $5.88 | $4.92 | $5.79 | +17.80% | 648,000 |
| Jan 1988 | $5.17 | $5.63 | $4.92 | $4.92 | -3.28% | 191,400 |
| Dec 1987 | $4.33 | $5.33 | $3.50 | $5.08 | +17.31% | 1,274,700 |
| Nov 1987 | $4.83 | $5.04 | $4.21 | $4.33 | -10.34% | 369,900 |
| Oct 1987 | $8.04 | $8.08 | $3.79 | $4.83 | -39.90% | 760,200 |
| Sep 1987 | $8.83 | $8.83 | $7.83 | $8.04 | -8.96% | 213,000 |
| Aug 1987 | $8.04 | $9.00 | $7.79 | $8.83 | +9.84% | 224,100 |
| Jul 1987 | $8.08 | $8.17 | $7.33 | $8.04 | -0.51% | 262,500 |
| Jun 1987 | $8.33 | $8.38 | $8.00 | $8.08 | -3.00% | 145,500 |
| May 1987 | $8.92 | $9.29 | $8.25 | $8.33 | -6.54% | 266,100 |
| Apr 1987 | $8.67 | $8.92 | $8.25 | $8.92 | +0.47% | 435,900 |
| Mar 1987 | $8.96 | $10.13 | $8.58 | $8.88 | -0.93% | 488,400 |
| Feb 1987 | $8.08 | $10.96 | $8.08 | $8.96 | +11.40% | 863,400 |
| Jan 1987 | $5.83 | $8.42 | $5.83 | $8.04 | +39.86% | 877,800 |
| Dec 1986 | $5.58 | $6.46 | $5.29 | $5.75 | +2.99% | 467,100 |
| Nov 1986 | $5.25 | $5.96 | $5.17 | $5.58 | +5.51% | 391,800 |
| Oct 1986 | $4.96 | $5.58 | $4.96 | $5.29 | +7.63% | 414,900 |
| Sep 1986 | $6.08 | $6.21 | $4.67 | $4.92 | -19.18% | 644,100 |
| Aug 1986 | $6.67 | $6.75 | $6.04 | $6.08 | -8.75% | 594,000 |
| Jul 1986 | $6.79 | $7.63 | $6.54 | $6.67 | -1.84% | 564,300 |
| Jun 1986 | $7.56 | $7.56 | $6.67 | $6.79 | -10.11% | 212,250 |
| May 1986 | $6.92 | $7.75 | $6.92 | $7.56 | +9.68% | 329,400 |
| Apr 1986 | $5.81 | $7.56 | $5.39 | $6.89 | +18.66% | 630,900 |
| Mar 1986 | $4.69 | $5.81 | $4.53 | $5.81 | +22.94% | 401,400 |
| Feb 1986 | $5.11 | $5.19 | $4.56 | $4.72 | -7.61% | 320,400 |
| Jan 1986 | $5.06 | $5.28 | $4.78 | $5.11 | +1.10% | 386,550 |
| Dec 1985 | $4.14 | $5.47 | $4.11 | $5.06 | +22.15% | 2,409,750 |
| Nov 1985 | $3.28 | $4.14 | $3.19 | $4.14 | +26.27% | 910,350 |
| Oct 1985 | $3.06 | $3.44 | $2.86 | $3.28 | +5.36% | 190,350 |
| Sep 1985 | $3.53 | $3.53 | $3.06 | $3.11 | -12.50% | 197,100 |
| Aug 1985 | $3.94 | $4.03 | $3.53 | $3.56 | -9.43% | 92,700 |
| Jul 1985 | $3.81 | $4.20 | $3.54 | $3.93 | +2.91% | 334,125 |
| Jun 1985 | $3.13 | $3.81 | $3.11 | $3.81 | +21.89% | 255,825 |
| May 1985 | $2.81 | $3.63 | $2.81 | $3.13 | +12.66% | 334,800 |
| Apr 1985 | $2.54 | $2.78 | $2.44 | $2.78 | +7.91% | 138,375 |
| Mar 1985 | $2.13 | $2.57 | $2.13 | $2.57 | +20.87% | 187,650 |
| Feb 1985 | $2.48 | $2.48 | $2.13 | $2.13 | -15.44% | 151,875 |
| Jan 1985 | $2.13 | $2.52 | $2.13 | $2.52 | +18.26% | 195,750 |
| Dec 1984 | $2.13 | $2.20 | $2.07 | $2.13 | -0.86% | 235,575 |
| Nov 1984 | $2.13 | $2.20 | $2.13 | $2.15 | +0.87% | 108,675 |
| Oct 1984 | $2.15 | $2.19 | $2.11 | $2.13 | -0.86% | 96,525 |
| Sep 1984 | $2.24 | $2.26 | $2.15 | $2.15 | -2.52% | 83,700 |
| Aug 1984 | $2.19 | $2.24 | $2.11 | $2.20 | +0.85% | 115,425 |
| Jul 1984 | $2.13 | $2.20 | $2.07 | $2.19 | +2.61% | 139,050 |
| Jun 1984 | $2.13 | $2.15 | $2.13 | $2.13 | 0.00% | 64,125 |
| May 1984 | $2.15 | $2.15 | $2.13 | $2.13 | -0.86% | 72,225 |
| Apr 1984 | $2.19 | $2.19 | $2.13 | $2.15 | -1.70% | 101,925 |
| Mar 1984 | $2.20 | $2.26 | $2.15 | $2.19 | -0.84% | 116,100 |
| Feb 1984 | $2.50 | $2.50 | $2.15 | $2.20 | -11.85% | 376,650 |
| Jan 1984 | $2.50 | $2.52 | $2.50 | $2.50 | 0.00% | 177,525 |
| Dec 1983 | $2.50 | $2.50 | $2.50 | $2.50 | 0.00% | 318,600 |
| Nov 1983 | $2.52 | $2.54 | $2.39 | $2.50 | -0.73% | 260,550 |
| Oct 1983 | $2.57 | $2.57 | $2.52 | $2.52 | -2.16% | 432,000 |
| Sep 1983 | $2.63 | $2.65 | $2.57 | $2.57 | -2.79% | 202,500 |
| Aug 1983 | $2.67 | $2.67 | $2.57 | $2.65 | -2.06% | 287,550 |
| Jul 1983 | $2.74 | $2.76 | $2.63 | $2.70 | -1.35% | 353,025 |
| Jun 1983 | $2.33 | $2.96 | $2.30 | $2.74 | +17.46% | 556,200 |
| May 1983 | $2.28 | $2.33 | $2.13 | $2.33 | +2.44% | 427,950 |
| Apr 1983 | $2.15 | $2.31 | $1.89 | $2.28 | +4.24% | 483,300 |
| Mar 1983 | $1.80 | $2.31 | $1.76 | $2.19 | +21.65% | 777,600 |
| Feb 1983 | $1.69 | $1.83 | $1.63 | $1.80 | +5.44% | 619,650 |
| Jan 1983 | $1.33 | $1.80 | $1.33 | $1.70 | +27.78% | 691,875 |
| Dec 1982 | $1.30 | $1.46 | $1.28 | $1.33 | +2.85% | 631,800 |
| Nov 1982 | $1.35 | $1.39 | $1.28 | $1.30 | -4.11% | 514,350 |
| Oct 1982 | $1.13 | $1.52 | $1.11 | $1.35 | +19.68% | 765,450 |
| Sep 1982 | $1.02 | $1.26 | $0.963 | $1.13 | +10.91% | 685,125 |
| Aug 1982 | $1.02 | $1.06 | $0.8519 | $1.02 | 0.00% | 762,075 |
| Jul 1982 | $1.20 | $1.20 | $1.02 | $1.02 | -17.91% | 119,475 |
| Jun 1982 | $1.37 | $1.43 | $1.24 | $1.24 | -8.23% | 103,275 |
| May 1982 | $1.56 | $1.61 | $1.26 | $1.35 | -13.09% | 355,050 |
| Apr 1982 | $1.46 | $1.63 | $1.46 | $1.56 | +6.33% | 253,125 |
| Mar 1982 | $1.52 | $1.54 | $1.31 | $1.46 | -3.65% | 447,525 |
| Feb 1982 | $1.46 | $1.69 | $1.37 | $1.52 | +1.23% | 310,500 |
| Jan 1982 | $1.46 | $1.57 | $1.31 | $1.50 | +3.85% | 295,650 |
| Dec 1981 | $1.44 | $1.50 | $1.30 | $1.44 | 0.00% | 682,425 |
| Nov 1981 | $1.63 | $1.74 | $1.44 | $1.44 | -11.36% | 359,775 |
| Oct 1981 | $1.83 | $1.83 | $1.54 | $1.63 | -11.11% | 857,925 |
| Sep 1981 | $2.33 | $2.39 | $1.63 | $1.83 | -20.80% | 627,075 |
| Aug 1981 | $2.44 | $2.48 | $2.30 | $2.31 | -5.30% | 328,725 |
| Jul 1981 | $2.44 | $2.54 | $2.33 | $2.44 | 0.00% | 232,200 |
| Jun 1981 | $3.11 | $3.15 | $2.33 | $2.44 | -21.43% | 611,550 |
| May 1981 | $2.83 | $3.20 | $2.78 | $3.11 | +9.80% | 907,875 |
| Apr 1981 | $3.15 | $3.20 | $2.83 | $2.83 | -10.00% | 623,025 |
| Mar 1981 | $2.96 | $3.46 | $2.87 | $3.15 | +6.25% | 512,325 |
| Feb 1981 | $3.50 | $3.50 | $2.74 | $2.96 | -16.23% | 769,500 |
| Jan 1981 | $2.96 | $3.67 | $2.70 | $3.54 | +19.37% | 1,485,675 |
| Dec 1980 | $2.37 | $3.04 | $2.13 | $2.96 | +24.03% | 1,414,125 |
| Nov 1980 | $2.44 | $2.48 | $2.06 | $2.39 | -0.77% | 817,425 |
| Oct 1980 | $2.28 | $2.78 | $2.28 | $2.41 | +5.69% | 1,102,950 |
| Sep 1980 | $1.61 | $2.61 | $1.57 | $2.28 | +46.43% | 2,610,900 |
| Aug 1980 | $1.80 | $1.81 | $1.56 | $1.56 | -13.40% | 712,800 |
| Jul 1980 | $1.52 | $1.94 | $1.52 | $1.80 | +18.29% | 818,775 |
| Jun 1980 | $1.87 | $1.96 | $1.52 | $1.52 | -18.81% | 984,150 |
| May 1980 | $1.83 | $2.11 | $1.83 | $1.87 | +2.02% | 510,300 |
| Apr 1980 | $1.78 | $1.87 | $1.63 | $1.83 | +2.06% | 961,200 |
| Mar 1980 | $2.66 | $2.66 | $1.78 | $1.80 | -32.40% | 56,700 |
| Feb 1980 | $2.55 | $2.66 | $2.55 | $2.66 | – | 2,700 |
Seasonality
BIO return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average | 1.3% | -0.9% | -0.7% | 0.9% | 1.7% | -0.1% | 9.8% | 3.8% | -4.2% | -1.3% | 5.3% | -2.4% |
| Months up | 5 of 10 | 7 of 10 | 5 of 10 | 6 of 10 | 6 of 10 | 6 of 10 | 10 of 10 | 5 of 10 | 2 of 10 | 4 of 10 | 6 of 9 | 5 of 9 |
| 2026 | -3.1% | -5.2% | 0.1% | 0.5% | 11.6% | -6.0% | 10.9% | 18.6% | -2.2% | -1.5% | ||
| 2025 | 9.9% | -26.5% | -8.1% | 0.2% | -7.0% | 6.3% | 0.3% | 23.1% | -5.9% | 14.0% | 1.7% | -6.7% |
| 2024 | -0.6% | 1.6% | 6.1% | -22.0% | 6.3% | -4.8% | 23.9% | -0.3% | -0.8% | 7.1% | -4.9% | -3.5% |
| 2023 | 11.2% | 2.2% | 0.2% | -5.9% | -17.2% | 1.5% | 6.9% | -1.3% | -10.4% | -23.2% | 10.8% | 5.9% |
| 2022 | -20.6% | 4.4% | -10.0% | -9.1% | 5.0% | -8.0% | 13.8% | -13.9% | -14.0% | -15.7% | 17.9% | 1.4% |
| 2021 | -1.6% | 1.9% | -2.3% | 10.3% | -4.4% | 7.0% | 14.8% | 8.8% | -7.3% | 6.5% | -5.2% | 0.3% |
| 2020 | -2.5% | -2.5% | -0.4% | 25.5% | 11.6% | -8.1% | 16.3% | -3.1% | 1.4% | 13.8% | -8.2% | 8.3% |
| 2019 | 7.6% | 8.4% | 12.8% | -1.6% | -4.7% | 8.9% | 0.7% | 7.2% | -1.5% | -0.3% | 11.4% | 0.2% |
| 2018 | 8.3% | 4.5% | -7.4% | 1.5% | 13.2% | 0.5% | 6.3% | 6.1% | -3.8% | -12.8% | 0.6% | -15.4% |
| 2017 | 4.3% | 2.4% | 2.4% | 9.5% | 2.4% | 1.3% | 4.1% | -7.6% | 2.0% | -1.1% | 23.4% | -12.0% |