West Pharmaceutical Services Inc (WST) stock
WSTNYSESurgical & Medical Instruments & ApparatusFiscal year ends December 31
Financials through Q3 FY2026, quarter ended Sep 30, 2026Last filing: 10-Q on Oct 29, 2026Score 20/3031% above fair value
$412.62−4.05 (-0.97%)
Close on Oct 30, 2026Market cap $29.04BP/E 46.3Yield 0.21%
Price history
West Pharmaceutical Services share prices for every month, newest first. Adjusted for stock splits, not for dividends.
Close, Oct 30, 2026
$412.62
-0.97% on the day
52-week range
$223.83 – $438.27
-5.9% from the high
Change over 52 weeks
+48.1%
From $278.54 on Oct 30, 2025
Average volume
662,054
Shares a day, last 90 sessions
| Month | Open | High | Low | Close | Change | Volume |
|---|---|---|---|---|---|---|
| Oct 2026 | $367.52 | $438.27 | $359.49 | $412.62 | +11.29% | 13,822,871 |
| Sep 2026 | $341.83 | $382.71 | $331.99 | $370.76 | +8.69% | 12,689,290 |
| Aug 2026 | $343.72 | $360.29 | $335.51 | $341.11 | +0.04% | 10,105,994 |
| Jul 2026 | $359.06 | $386.00 | $325.27 | $340.96 | -5.03% | 18,443,612 |
| Jun 2026 | $321.65 | $359.74 | $308.50 | $359.00 | +11.21% | 17,097,360 |
| May 2026 | $294.27 | $330.88 | $294.27 | $322.81 | +8.47% | 15,779,654 |
| Apr 2026 | $251.31 | $320.33 | $240.16 | $297.59 | +18.73% | 20,318,648 |
| Mar 2026 | $251.31 | $254.61 | $228.40 | $250.64 | -1.45% | 19,771,614 |
| Feb 2026 | $230.90 | $259.90 | $227.49 | $254.34 | +10.05% | 20,589,508 |
| Jan 2026 | $275.25 | $291.38 | $223.83 | $231.12 | -16.00% | 20,502,354 |
| Dec 2025 | $275.46 | $285.54 | $263.38 | $275.14 | -0.76% | 14,629,644 |
| Nov 2025 | $279.84 | $287.98 | $253.32 | $277.25 | -1.71% | 12,984,827 |
| Oct 2025 | $264.22 | $322.34 | $257.50 | $282.07 | +7.52% | 16,560,643 |
| Sep 2025 | $246.79 | $264.29 | $241.64 | $262.33 | +6.23% | 13,617,806 |
| Aug 2025 | $239.26 | $250.38 | $233.67 | $246.95 | +3.21% | 11,197,769 |
| Jul 2025 | $218.80 | $291.00 | $206.80 | $239.26 | +9.35% | 18,367,755 |
| Jun 2025 | $207.91 | $230.27 | $206.19 | $218.80 | +3.77% | 13,826,533 |
| May 2025 | $211.44 | $221.42 | $202.79 | $210.85 | -0.21% | 13,107,667 |
| Apr 2025 | $224.54 | $224.54 | $187.43 | $211.29 | -5.62% | 23,638,191 |
| Mar 2025 | $231.84 | $236.71 | $217.41 | $223.88 | -3.64% | 19,788,174 |
| Feb 2025 | $340.48 | $342.55 | $197.01 | $232.34 | -31.97% | 29,615,553 |
| Jan 2025 | $329.70 | $348.90 | $321.46 | $341.55 | +4.27% | 8,656,743 |
| Dec 2024 | $323.36 | $338.00 | $313.92 | $327.56 | +0.58% | 10,324,640 |
| Nov 2024 | $308.92 | $347.53 | $299.36 | $325.68 | +5.76% | 11,747,397 |
| Oct 2024 | $300.57 | $352.33 | $281.00 | $307.93 | +2.59% | 18,150,988 |
| Sep 2024 | $311.95 | $319.99 | $292.92 | $300.16 | -4.29% | 8,094,359 |
| Aug 2024 | $304.13 | $319.76 | $283.18 | $313.63 | +2.44% | 10,529,591 |
| Jul 2024 | $331.46 | $335.34 | $265.00 | $306.17 | -7.05% | 16,370,205 |
| Jun 2024 | $331.04 | $342.42 | $310.00 | $329.39 | -0.61% | 11,940,216 |
| May 2024 | $356.40 | $372.79 | $320.65 | $331.41 | -7.29% | 12,144,098 |
| Apr 2024 | $394.65 | $396.75 | $352.76 | $357.48 | -9.66% | 9,389,100 |
| Mar 2024 | $356.35 | $400.88 | $336.21 | $395.71 | +10.42% | 9,912,704 |
| Feb 2024 | $373.42 | $413.70 | $325.74 | $358.36 | -3.93% | 14,417,393 |
| Jan 2024 | $349.63 | $380.33 | $336.61 | $373.03 | +5.94% | 9,309,757 |
| Dec 2023 | $350.31 | $368.96 | $337.47 | $352.12 | +0.39% | 8,178,703 |
| Nov 2023 | $318.36 | $358.49 | $314.42 | $350.76 | +10.20% | 9,065,198 |
| Oct 2023 | $373.34 | $394.43 | $310.42 | $318.29 | -15.17% | 8,773,676 |
| Sep 2023 | $410.41 | $410.41 | $368.45 | $375.21 | -7.79% | 5,754,136 |
| Aug 2023 | $366.87 | $415.73 | $365.02 | $406.90 | +10.56% | 8,166,733 |
| Jul 2023 | $379.23 | $389.39 | $350.59 | $368.04 | -3.77% | 7,154,910 |
| Jun 2023 | $334.72 | $387.13 | $333.71 | $382.47 | +14.30% | 8,211,622 |
| May 2023 | $361.68 | $376.72 | $330.16 | $334.63 | -7.37% | 8,973,029 |
| Apr 2023 | $342.84 | $372.06 | $339.91 | $361.24 | +4.26% | 8,290,181 |
| Mar 2023 | $315.40 | $348.62 | $309.43 | $346.47 | +9.29% | 11,368,821 |
| Feb 2023 | $266.99 | $329.07 | $263.69 | $317.03 | +19.36% | 14,097,387 |
| Jan 2023 | $238.31 | $272.28 | $225.66 | $265.60 | +12.85% | 11,662,370 |
| Dec 2022 | $236.34 | $255.30 | $224.15 | $235.35 | +0.29% | 12,142,821 |
| Nov 2022 | $230.16 | $253.53 | $206.99 | $234.66 | +1.98% | 17,947,646 |
| Oct 2022 | $249.05 | $264.69 | $206.19 | $230.10 | -6.49% | 17,362,674 |
| Sep 2022 | $295.83 | $316.81 | $244.71 | $246.08 | -17.06% | 9,150,727 |
| Aug 2022 | $340.26 | $347.24 | $294.71 | $296.69 | -13.64% | 7,230,694 |
| Jul 2022 | $303.44 | $345.10 | $290.51 | $343.56 | +13.62% | 8,880,556 |
| Jun 2022 | $313.04 | $318.25 | $275.89 | $302.37 | -2.58% | 8,807,964 |
| May 2022 | $313.87 | $321.37 | $288.12 | $310.38 | -1.49% | 10,207,635 |
| Apr 2022 | $412.33 | $424.00 | $308.36 | $315.06 | -23.29% | 8,792,362 |
| Mar 2022 | $388.53 | $421.88 | $358.57 | $410.71 | +6.10% | 8,260,537 |
| Feb 2022 | $396.32 | $408.98 | $349.15 | $387.08 | -1.56% | 7,966,298 |
| Jan 2022 | $466.35 | $468.05 | $360.40 | $393.22 | -16.16% | 11,147,417 |
| Dec 2021 | $442.31 | $475.00 | $419.21 | $469.01 | +5.95% | 7,555,842 |
| Nov 2021 | $430.94 | $457.99 | $399.67 | $442.66 | +2.97% | 8,917,542 |
| Oct 2021 | $425.00 | $432.52 | $399.16 | $429.88 | +1.26% | 7,596,372 |
| Sep 2021 | $449.67 | $475.35 | $421.52 | $424.54 | -6.00% | 6,940,224 |
| Aug 2021 | $412.34 | $456.64 | $404.40 | $451.62 | +9.69% | 6,225,127 |
| Jul 2021 | $359.26 | $413.22 | $359.11 | $411.73 | +14.66% | 8,014,269 |
| Jun 2021 | $347.99 | $364.53 | $328.28 | $359.10 | +3.34% | 7,307,315 |
| May 2021 | $328.07 | $349.26 | $323.08 | $347.51 | +5.78% | 8,608,617 |
| Apr 2021 | $283.96 | $333.58 | $278.90 | $328.52 | +16.59% | 7,931,715 |
| Mar 2021 | $281.69 | $286.00 | $253.86 | $281.78 | +0.40% | 9,755,362 |
| Feb 2021 | $300.60 | $303.40 | $265.43 | $280.65 | -6.29% | 10,022,300 |
| Jan 2021 | $283.43 | $312.12 | $280.00 | $299.49 | +5.71% | 10,203,757 |
| Dec 2020 | $274.79 | $286.58 | $259.83 | $283.31 | +2.96% | 9,913,967 |
| Nov 2020 | $273.67 | $305.00 | $264.06 | $275.16 | +1.14% | 7,418,382 |
| Oct 2020 | $278.76 | $303.14 | $264.79 | $272.07 | -1.03% | 9,203,492 |
| Sep 2020 | $285.45 | $288.65 | $254.01 | $274.90 | -3.19% | 11,335,476 |
| Aug 2020 | $272.40 | $285.00 | $261.60 | $283.96 | +5.61% | 9,565,913 |
| Jul 2020 | $227.55 | $273.78 | $222.97 | $268.87 | +18.36% | 11,464,938 |
| Jun 2020 | $214.55 | $227.96 | $197.72 | $227.17 | +5.15% | 15,269,752 |
| May 2020 | $187.64 | $221.96 | $185.09 | $216.04 | +14.15% | 29,139,497 |
| Apr 2020 | $149.27 | $201.79 | $145.78 | $189.26 | +24.31% | 10,421,817 |
| Mar 2020 | $151.54 | $159.91 | $124.53 | $152.25 | +1.12% | 14,544,432 |
| Feb 2020 | $156.60 | $176.66 | $147.57 | $150.56 | -3.46% | 7,818,030 |
| Jan 2020 | $150.25 | $159.29 | $148.72 | $155.95 | +3.74% | 9,475,771 |
| Dec 2019 | $147.13 | $152.12 | $141.36 | $150.33 | +2.24% | 7,465,319 |
| Nov 2019 | $144.87 | $151.15 | $144.28 | $147.03 | +2.22% | 10,367,494 |
| Oct 2019 | $142.62 | $145.20 | $136.73 | $143.84 | +1.42% | 9,337,727 |
| Sep 2019 | $144.50 | $152.10 | $138.89 | $141.82 | -2.50% | 7,292,945 |
| Aug 2019 | $137.59 | $147.69 | $132.70 | $145.46 | +5.97% | 5,540,394 |
| Jul 2019 | $126.00 | $139.23 | $120.12 | $137.27 | +9.68% | 7,541,155 |
| Jun 2019 | $114.60 | $125.86 | $113.99 | $125.15 | +9.21% | 5,372,286 |
| May 2019 | $121.45 | $123.20 | $113.04 | $114.60 | -7.42% | 5,602,938 |
| Apr 2019 | $110.84 | $124.10 | $109.88 | $123.79 | +12.33% | 7,766,275 |
| Mar 2019 | $105.09 | $110.39 | $101.15 | $110.20 | +5.20% | 8,403,202 |
| Feb 2019 | $108.25 | $108.92 | $98.60 | $104.75 | -3.25% | 12,758,155 |
| Jan 2019 | $96.76 | $108.56 | $93.08 | $108.27 | +10.45% | 7,257,528 |
| Dec 2018 | $110.95 | $111.63 | $91.75 | $98.03 | -10.52% | 7,673,902 |
| Nov 2018 | $106.44 | $112.81 | $103.08 | $109.56 | +3.44% | 5,769,937 |
| Oct 2018 | $124.22 | $125.09 | $99.80 | $105.92 | -14.21% | 8,943,471 |
| Sep 2018 | $116.87 | $124.51 | $115.07 | $123.47 | +5.48% | 6,831,994 |
| Aug 2018 | $109.33 | $118.05 | $109.33 | $117.05 | +6.75% | 6,633,634 |
| Jul 2018 | $98.55 | $113.29 | $96.97 | $109.65 | +10.43% | 8,610,736 |
| Jun 2018 | $93.68 | $102.14 | $92.74 | $99.29 | +6.76% | 7,586,450 |
| May 2018 | $87.87 | $94.77 | $84.91 | $93.00 | +5.43% | 6,691,854 |
| Apr 2018 | $88.07 | $92.81 | $82.74 | $88.21 | -0.09% | 9,983,493 |
| Mar 2018 | $87.04 | $92.90 | $84.73 | $88.29 | +1.23% | 8,218,654 |
| Feb 2018 | $100.00 | $100.88 | $85.65 | $87.22 | -12.95% | 9,403,802 |
| Jan 2018 | $99.00 | $102.80 | $97.34 | $100.20 | +1.55% | 7,222,189 |
| Dec 2017 | $99.58 | $100.81 | $96.91 | $98.67 | -1.26% | 5,424,330 |
| Nov 2017 | $101.35 | $102.24 | $95.58 | $99.93 | -1.45% | 6,346,276 |
| Oct 2017 | $96.67 | $103.36 | $89.77 | $101.40 | +5.34% | 10,666,301 |
| Sep 2017 | $87.12 | $96.81 | $86.26 | $96.26 | +10.59% | 8,544,193 |
| Aug 2017 | $89.30 | $89.30 | $84.11 | $87.04 | -1.87% | 7,057,868 |
| Jul 2017 | $94.92 | $95.92 | $80.02 | $88.70 | -6.16% | 8,481,376 |
| Jun 2017 | $97.44 | $99.91 | $93.62 | $94.52 | -2.58% | 6,093,497 |
| May 2017 | $92.09 | $97.93 | $92.09 | $97.02 | +5.42% | 6,583,406 |
| Apr 2017 | $81.50 | $93.78 | $77.97 | $92.03 | +12.77% | 8,832,107 |
| Mar 2017 | $83.41 | $84.84 | $79.06 | $81.61 | -1.04% | 7,838,873 |
| Feb 2017 | $85.05 | $87.35 | $80.59 | $82.47 | -2.55% | 6,496,679 |
| Jan 2017 | $84.99 | $88.30 | $81.91 | $84.63 | -0.24% | 7,121,785 |
| Dec 2016 | $81.20 | $86.50 | $79.45 | $84.83 | +4.53% | 6,508,803 |
| Nov 2016 | $75.80 | $83.21 | $73.69 | $81.15 | +6.73% | 8,126,785 |
| Oct 2016 | $74.14 | $76.64 | $70.17 | $76.03 | +2.05% | 8,483,726 |
| Sep 2016 | $82.07 | $84.33 | $71.23 | $74.50 | -8.96% | 10,385,000 |
| Aug 2016 | $80.46 | $82.93 | $79.59 | $81.83 | +1.93% | 5,199,800 |
| Jul 2016 | $75.95 | $81.13 | $75.24 | $80.28 | +5.80% | 7,112,400 |
| Jun 2016 | $74.80 | $77.71 | $71.23 | $75.88 | +1.07% | 14,937,300 |
| May 2016 | $71.52 | $75.23 | $69.60 | $75.08 | +5.45% | 6,810,300 |
| Apr 2016 | $68.96 | $73.40 | $68.42 | $71.20 | +2.71% | 7,364,200 |
| Mar 2016 | $62.31 | $69.59 | $61.94 | $69.32 | +11.77% | 7,061,300 |
| Feb 2016 | $56.94 | $63.29 | $53.88 | $62.02 | +8.39% | 7,529,600 |
| Jan 2016 | $59.28 | $59.46 | $54.27 | $57.22 | -4.98% | 8,971,200 |
| Dec 2015 | $63.37 | $64.32 | $60.19 | $60.22 | -4.49% | 5,479,700 |
| Nov 2015 | $60.15 | $64.59 | $60.01 | $63.05 | +5.07% | 5,083,400 |
| Oct 2015 | $54.16 | $60.78 | $52.79 | $60.01 | +10.88% | 5,908,300 |
| Sep 2015 | $54.97 | $58.16 | $53.10 | $54.12 | -3.10% | 6,996,400 |
| Aug 2015 | $60.20 | $61.07 | $53.99 | $55.85 | -6.71% | 5,904,800 |
| Jul 2015 | $58.54 | $61.73 | $56.72 | $59.87 | +3.08% | 16,377,900 |
| Jun 2015 | $54.49 | $59.46 | $53.96 | $58.08 | +7.28% | 5,097,400 |
| May 2015 | $53.31 | $55.84 | $52.73 | $54.14 | +1.61% | 4,753,800 |
| Apr 2015 | $60.00 | $60.00 | $53.09 | $53.28 | -11.51% | 6,560,700 |
| Mar 2015 | $54.73 | $60.30 | $53.41 | $60.21 | +10.03% | 7,992,500 |
| Feb 2015 | $49.33 | $55.10 | $48.66 | $54.72 | +10.97% | 6,115,000 |
| Jan 2015 | $53.57 | $54.09 | $49.13 | $49.31 | -7.38% | 6,133,800 |
| Dec 2014 | $51.94 | $55.29 | $51.26 | $53.24 | +2.36% | 5,837,600 |
| Nov 2014 | $51.26 | $53.28 | $49.72 | $52.01 | +1.48% | 4,939,000 |
| Oct 2014 | $44.64 | $51.63 | $43.49 | $51.25 | +14.50% | 7,879,900 |
| Sep 2014 | $43.50 | $45.43 | $43.11 | $44.76 | +3.06% | 6,333,900 |
| Aug 2014 | $40.69 | $44.91 | $39.11 | $43.43 | +6.58% | 6,624,300 |
| Jul 2014 | $42.45 | $43.70 | $39.41 | $40.75 | -3.39% | 6,976,000 |
| Jun 2014 | $42.17 | $43.06 | $40.93 | $42.18 | +0.21% | 4,946,700 |
| May 2014 | $43.12 | $44.28 | $41.13 | $42.09 | -2.97% | 6,225,200 |
| Apr 2014 | $44.13 | $45.73 | $41.92 | $43.38 | -1.52% | 6,652,100 |
| Mar 2014 | $45.33 | $47.35 | $41.41 | $44.05 | -3.36% | 5,907,100 |
| Feb 2014 | $47.39 | $48.94 | $44.79 | $45.58 | -3.94% | 5,007,900 |
| Jan 2014 | $49.06 | $51.12 | $47.07 | $47.45 | -3.28% | 9,496,200 |
| Dec 2013 | $49.78 | $50.07 | $47.27 | $49.06 | -1.72% | 4,996,500 |
| Nov 2013 | $48.20 | $50.60 | $45.74 | $49.92 | +3.25% | 4,156,000 |
| Oct 2013 | $41.27 | $48.81 | $39.62 | $48.35 | +17.50% | 6,578,600 |
| Sep 2013 | $37.36 | $41.54 | $36.77 | $41.15 | +11.29% | 4,943,200 |
| Aug 2013 | $37.90 | $39.69 | $36.28 | $36.98 | +0.26% | 4,977,800 |
| Jul 2013 | $35.38 | $37.26 | $35.25 | $36.88 | +4.98% | 5,865,200 |
| Jun 2013 | $34.32 | $35.45 | $31.83 | $35.13 | +2.49% | 6,507,400 |
| May 2013 | $31.79 | $34.65 | $31.53 | $34.28 | +7.34% | 4,603,800 |
| Apr 2013 | $32.50 | $32.57 | $30.85 | $31.93 | -1.66% | 4,701,200 |
| Mar 2013 | $30.05 | $32.74 | $29.97 | $32.47 | +7.48% | 4,539,600 |
| Feb 2013 | $29.66 | $30.50 | $28.79 | $30.21 | +2.04% | 5,162,800 |
| Jan 2013 | $27.83 | $30.01 | $27.31 | $29.61 | +8.15% | 10,697,400 |
| Dec 2012 | $27.16 | $28.01 | $26.61 | $27.38 | +1.33% | 4,792,800 |
| Nov 2012 | $27.04 | $27.50 | $25.25 | $27.02 | +0.30% | 5,123,000 |
| Oct 2012 | $26.59 | $27.33 | $26.15 | $26.94 | +1.51% | 5,504,200 |
| Sep 2012 | $23.73 | $26.74 | $23.52 | $26.54 | +12.08% | 5,549,000 |
| Aug 2012 | $25.01 | $25.23 | $23.44 | $23.68 | -4.88% | 6,020,400 |
| Jul 2012 | $25.27 | $25.91 | $24.68 | $24.89 | -1.41% | 5,514,200 |
| Jun 2012 | $23.40 | $25.25 | $23.38 | $25.25 | +5.63% | 8,024,800 |
| May 2012 | $22.45 | $24.20 | $21.34 | $23.90 | +6.46% | 9,672,600 |
| Apr 2012 | $21.21 | $22.78 | $19.65 | $22.45 | +5.57% | 6,413,000 |
| Mar 2012 | $20.80 | $21.51 | $19.84 | $21.27 | +2.24% | 4,957,200 |
| Feb 2012 | $20.36 | $21.50 | $20.25 | $20.80 | +2.77% | 3,952,200 |
| Jan 2012 | $19.43 | $20.40 | $18.68 | $20.24 | +6.67% | 4,138,200 |
| Dec 2011 | $19.17 | $19.45 | $17.94 | $18.98 | -1.51% | 6,274,400 |
| Nov 2011 | $18.75 | $19.85 | $17.79 | $19.27 | -0.87% | 5,752,800 |
| Oct 2011 | $18.43 | $20.75 | $17.75 | $19.44 | +4.77% | 7,956,400 |
| Sep 2011 | $20.04 | $20.49 | $18.44 | $18.55 | -7.53% | 7,237,400 |
| Aug 2011 | $22.12 | $22.16 | $18.88 | $20.06 | -8.55% | 10,455,200 |
| Jul 2011 | $21.86 | $23.28 | $21.44 | $21.94 | +0.25% | 4,647,800 |
| Jun 2011 | $23.17 | $23.23 | $20.95 | $21.88 | -5.85% | 4,944,400 |
| May 2011 | $23.74 | $23.81 | $22.20 | $23.24 | -1.61% | 5,288,000 |
| Apr 2011 | $22.50 | $23.98 | $22.06 | $23.62 | +5.52% | 3,868,600 |
| Mar 2011 | $20.57 | $22.45 | $20.06 | $22.39 | +8.90% | 5,517,400 |
| Feb 2011 | $20.16 | $21.06 | $19.81 | $20.56 | +2.80% | 4,301,000 |
| Jan 2011 | $20.82 | $21.14 | $19.38 | $20.00 | -2.94% | 4,426,400 |
| Dec 2010 | $19.18 | $21.30 | $19.15 | $20.60 | +8.65% | 4,778,200 |
| Nov 2010 | $17.94 | $19.68 | $17.78 | $18.96 | +6.25% | 5,624,200 |
| Oct 2010 | $17.30 | $18.29 | $16.68 | $17.85 | +4.02% | 6,371,000 |
| Sep 2010 | $17.05 | $17.67 | $16.37 | $17.16 | +2.05% | 7,844,200 |
| Aug 2010 | $18.36 | $18.52 | $16.38 | $16.81 | -7.48% | 7,480,600 |
| Jul 2010 | $18.21 | $18.52 | $17.25 | $18.17 | -0.41% | 8,187,400 |
| Jun 2010 | $19.50 | $20.03 | $18.08 | $18.25 | -7.27% | 8,375,400 |
| May 2010 | $21.07 | $21.51 | $19.05 | $19.68 | -5.97% | 9,204,400 |
| Apr 2010 | $21.11 | $22.42 | $20.50 | $20.93 | -0.24% | 8,368,200 |
| Mar 2010 | $19.60 | $21.65 | $19.54 | $20.98 | +7.70% | 5,485,800 |
| Feb 2010 | $18.20 | $19.75 | $17.54 | $19.48 | +7.21% | 5,357,600 |
| Jan 2010 | $19.78 | $19.86 | $17.87 | $18.17 | -7.32% | 4,420,600 |
| Dec 2009 | $19.44 | $20.24 | $19.10 | $19.60 | +1.69% | 6,714,200 |
| Nov 2009 | $19.84 | $20.41 | $18.33 | $19.28 | -2.33% | 8,139,800 |
| Oct 2009 | $20.17 | $20.89 | $19.54 | $19.74 | -2.81% | 6,888,200 |
| Sep 2009 | $20.03 | $20.61 | $19.84 | $20.31 | +1.05% | 6,722,800 |
| Aug 2009 | $18.46 | $20.61 | $18.17 | $20.10 | +10.11% | 10,693,400 |
| Jul 2009 | $17.51 | $18.49 | $15.83 | $18.25 | +4.73% | 7,961,200 |
| Jun 2009 | $16.36 | $17.60 | $16.29 | $17.43 | +7.83% | 7,707,200 |
| May 2009 | $16.34 | $17.06 | $15.64 | $16.16 | -1.01% | 10,295,600 |
| Apr 2009 | $16.17 | $17.47 | $15.73 | $16.33 | -0.49% | 10,276,400 |
| Mar 2009 | $15.07 | $17.35 | $13.93 | $16.41 | +6.87% | 10,839,600 |
| Feb 2009 | $16.44 | $17.68 | $14.04 | $15.35 | -7.59% | 12,897,800 |
| Jan 2009 | $18.91 | $19.25 | $15.72 | $16.61 | -12.05% | 9,640,400 |
| Dec 2008 | $17.39 | $19.66 | $16.43 | $18.89 | +6.39% | 11,233,800 |
| Nov 2008 | $19.92 | $20.73 | $14.76 | $17.75 | -11.07% | 11,227,000 |
| Oct 2008 | $24.13 | $24.80 | $17.62 | $19.96 | -18.23% | 14,818,200 |
| Sep 2008 | $24.52 | $26.00 | $23.62 | $24.41 | +0.02% | 12,350,000 |
| Aug 2008 | $22.98 | $25.76 | $22.69 | $24.41 | +6.29% | 11,553,000 |
| Jul 2008 | $21.41 | $23.42 | $21.13 | $22.96 | +6.10% | 11,591,200 |
| Jun 2008 | $23.59 | $24.23 | $21.52 | $21.64 | -8.75% | 10,189,600 |
| May 2008 | $24.00 | $24.46 | $22.26 | $23.72 | +1.11% | 8,068,400 |
| Apr 2008 | $22.32 | $23.94 | $21.88 | $23.46 | +6.06% | 11,577,400 |
| Mar 2008 | $20.70 | $22.74 | $19.24 | $22.12 | +7.09% | 14,059,800 |
| Feb 2008 | $19.63 | $22.19 | $18.48 | $20.65 | +5.63% | 21,021,400 |
| Jan 2008 | $20.23 | $21.19 | $18.76 | $19.55 | -3.67% | 13,858,000 |
| Dec 2007 | $18.76 | $20.41 | $17.60 | $20.30 | +8.04% | 10,151,800 |
| Nov 2007 | $20.03 | $21.93 | $18.25 | $18.79 | -9.12% | 15,744,800 |
| Oct 2007 | $20.87 | $21.27 | $19.25 | $20.67 | -0.77% | 17,977,400 |
| Sep 2007 | $19.82 | $22.00 | $18.94 | $20.83 | +4.02% | 12,591,200 |
| Aug 2007 | $23.02 | $23.45 | $19.00 | $20.03 | -13.46% | 23,897,000 |
| Jul 2007 | $23.74 | $25.99 | $22.88 | $23.14 | -1.85% | 9,907,000 |
| Jun 2007 | $25.50 | $26.00 | $23.48 | $23.58 | -7.29% | 10,085,000 |
| May 2007 | $24.89 | $26.17 | $23.84 | $25.43 | +2.19% | 10,469,000 |
| Apr 2007 | $23.25 | $27.42 | $22.62 | $24.89 | +7.19% | 11,970,200 |
| Mar 2007 | $22.10 | $23.36 | $20.66 | $23.22 | +2.59% | 19,433,200 |
| Feb 2007 | $24.29 | $24.76 | $21.50 | $22.63 | -6.74% | 7,499,800 |
| Jan 2007 | $25.61 | $26.13 | $22.67 | $24.27 | -5.27% | 10,376,400 |
| Dec 2006 | $24.55 | $26.39 | $23.81 | $25.62 | +4.34% | 8,885,600 |
| Nov 2006 | $20.95 | $25.73 | $20.38 | $24.55 | +16.79% | 12,791,400 |
| Oct 2006 | $19.58 | $21.74 | $19.00 | $21.02 | +7.05% | 10,042,600 |
| Sep 2006 | $20.10 | $21.33 | $18.83 | $19.64 | -1.60% | 13,504,400 |
| Aug 2006 | $19.42 | $20.15 | $17.77 | $19.96 | +2.86% | 9,405,600 |
| Jul 2006 | $18.03 | $19.99 | $15.72 | $19.40 | +6.95% | 10,654,800 |
| Jun 2006 | $17.01 | $18.59 | $16.38 | $18.14 | +6.64% | 9,952,200 |
| May 2006 | $18.35 | $18.99 | $16.52 | $17.01 | -4.49% | 7,620,800 |
| Apr 2006 | $17.29 | $17.96 | $16.50 | $17.81 | +2.59% | 8,355,600 |
| Mar 2006 | $16.13 | $17.36 | $15.32 | $17.36 | +7.53% | 6,171,000 |
| Feb 2006 | $15.24 | $16.72 | $14.23 | $16.15 | +5.76% | 4,895,800 |
| Jan 2006 | $12.58 | $15.55 | $12.42 | $15.27 | +21.97% | 9,731,200 |
| Dec 2005 | $12.55 | $12.87 | $12.03 | $12.52 | +0.24% | 4,381,400 |
| Nov 2005 | $11.90 | $13.21 | $11.71 | $12.49 | +4.13% | 5,663,400 |
| Oct 2005 | $14.80 | $14.85 | $9.29 | $11.99 | -19.18% | 8,854,200 |
| Sep 2005 | $14.15 | $15.00 | $13.75 | $14.84 | +4.66% | 5,117,800 |
| Aug 2005 | $13.78 | $14.23 | $12.86 | $14.18 | +3.05% | 4,238,200 |
| Jul 2005 | $14.08 | $14.63 | $12.88 | $13.76 | -1.93% | 4,612,400 |
| Jun 2005 | $13.88 | $14.45 | $13.35 | $14.03 | +0.75% | 5,574,800 |
| May 2005 | $13.27 | $14.45 | $13.22 | $13.92 | +5.69% | 4,534,200 |
| Apr 2005 | $11.95 | $13.60 | $11.45 | $13.17 | +10.21% | 4,348,200 |
| Mar 2005 | $12.83 | $13.08 | $11.63 | $11.95 | -7.00% | 3,211,600 |
| Feb 2005 | $13.10 | $13.54 | $12.50 | $12.85 | -1.53% | 4,209,600 |
| Jan 2005 | $12.50 | $13.21 | $12.48 | $13.05 | +4.27% | 6,392,000 |
| Dec 2004 | $11.63 | $12.75 | $11.01 | $12.52 | +7.06% | 5,152,800 |
| Nov 2004 | $11.47 | $11.98 | $11.31 | $11.69 | +2.05% | 2,328,000 |
| Oct 2004 | $10.40 | $11.72 | $10.18 | $11.46 | +9.88% | 4,001,800 |
| Sep 2004 | $9.96 | $10.46 | $9.63 | $10.43 | +4.28% | 2,621,400 |
| Aug 2004 | $9.46 | $10.00 | $9.15 | $10.00 | +4.99% | 2,603,600 |
| Jul 2004 | $10.63 | $10.83 | $9.22 | $9.52 | -9.95% | 3,061,600 |
| Jun 2004 | $9.49 | $10.82 | $9.30 | $10.58 | +11.29% | 3,590,800 |
| May 2004 | $9.69 | $9.73 | $9.20 | $9.50 | -2.04% | 2,074,800 |
| Apr 2004 | $9.33 | $9.85 | $9.33 | $9.70 | +3.74% | 4,456,800 |
| Mar 2004 | $9.03 | $9.50 | $8.59 | $9.35 | +1.41% | 3,853,600 |
| Feb 2004 | $8.93 | $9.36 | $8.87 | $9.22 | +3.60% | 2,446,800 |
| Jan 2004 | $8.53 | $9.24 | $8.19 | $8.90 | +5.01% | 2,729,600 |
| Dec 2003 | $8.50 | $8.95 | $8.30 | $8.48 | -0.29% | 2,312,400 |
| Nov 2003 | $8.30 | $8.78 | $8.08 | $8.50 | +2.87% | 2,319,200 |
| Oct 2003 | $7.84 | $8.38 | $7.73 | $8.26 | +5.56% | 2,658,000 |
| Sep 2003 | $7.23 | $8.69 | $7.22 | $7.83 | +7.97% | 2,418,000 |
| Aug 2003 | $6.56 | $7.25 | $6.39 | $7.25 | +10.56% | 1,377,600 |
| Jul 2003 | $6.10 | $6.57 | $5.80 | $6.56 | +7.06% | 1,754,400 |
| Jun 2003 | $6.29 | $6.29 | $5.68 | $6.13 | -2.55% | 1,669,600 |
| May 2003 | $5.95 | $6.54 | $5.90 | $6.29 | +5.41% | 1,229,600 |
| Apr 2003 | $4.98 | $5.99 | $4.98 | $5.96 | +21.68% | 1,757,200 |
| Mar 2003 | $4.80 | $5.37 | $4.73 | $4.90 | +2.24% | 1,397,600 |
| Feb 2003 | $4.73 | $4.88 | $4.16 | $4.79 | +1.00% | 1,412,400 |
| Jan 2003 | $6.08 | $6.22 | $4.59 | $4.75 | -22.21% | 1,415,600 |
| Dec 2002 | $5.13 | $6.20 | $5.12 | $6.10 | +17.87% | 1,290,400 |
| Nov 2002 | $4.80 | $5.39 | $4.73 | $5.18 | +7.92% | 1,328,800 |
| Oct 2002 | $5.36 | $5.36 | $4.06 | $4.80 | -10.46% | 3,480,400 |
| Sep 2002 | $5.99 | $6.03 | $5.27 | $5.36 | -10.53% | 2,910,800 |
| Aug 2002 | $6.55 | $6.58 | $5.94 | $5.99 | -8.35% | 4,023,600 |
| Jul 2002 | $8.00 | $8.00 | $6.19 | $6.53 | -18.60% | 1,866,400 |
| Jun 2002 | $7.14 | $8.13 | $7.06 | $8.02 | +12.28% | 2,266,800 |
| May 2002 | $7.00 | $7.40 | $6.98 | $7.15 | +2.07% | 1,596,000 |
| Apr 2002 | $7.56 | $7.57 | $6.98 | $7.00 | -7.74% | 2,081,600 |
| Mar 2002 | $7.21 | $7.63 | $7.10 | $7.59 | +4.84% | 2,148,400 |
| Feb 2002 | $6.39 | $7.30 | $6.25 | $7.24 | +12.43% | 2,588,400 |
| Jan 2002 | $6.65 | $6.82 | $6.33 | $6.44 | -3.20% | 1,345,200 |
| Dec 2001 | $6.80 | $6.91 | $6.61 | $6.65 | -2.21% | 1,364,800 |
| Nov 2001 | $6.10 | $7.08 | $6.04 | $6.80 | +11.48% | 1,702,400 |
| Oct 2001 | $6.14 | $6.49 | $5.83 | $6.10 | -0.81% | 5,724,000 |
| Sep 2001 | $6.43 | $6.48 | $5.78 | $6.15 | -4.28% | 968,800 |
| Aug 2001 | $6.70 | $6.78 | $6.43 | $6.43 | -4.10% | 912,800 |
| Jul 2001 | $6.75 | $7.09 | $6.21 | $6.70 | -0.74% | 1,682,400 |
| Jun 2001 | $6.74 | $6.84 | $6.50 | $6.75 | +0.33% | 1,242,400 |
| May 2001 | $6.89 | $6.89 | $6.46 | $6.73 | -2.32% | 1,762,800 |
| Apr 2001 | $5.84 | $6.90 | $5.70 | $6.89 | +17.99% | 1,576,000 |
| Mar 2001 | $6.26 | $6.54 | $5.69 | $5.84 | -6.97% | 1,244,800 |
| Feb 2001 | $6.03 | $6.54 | $6.00 | $6.28 | +3.85% | 1,136,400 |
| Jan 2001 | $6.16 | $6.42 | $5.91 | $6.04 | -1.60% | 1,335,200 |
| Dec 2000 | $5.66 | $6.25 | $5.63 | $6.14 | +7.97% | 1,160,800 |
| Nov 2000 | $5.50 | $5.88 | $5.17 | $5.69 | +3.41% | 1,417,600 |
| Oct 2000 | $5.83 | $5.92 | $5.31 | $5.50 | -5.38% | 1,222,400 |
| Sep 2000 | $5.20 | $5.97 | $5.14 | $5.81 | +11.71% | 1,298,000 |
| Aug 2000 | $5.13 | $5.38 | $4.91 | $5.20 | +0.91% | 2,707,600 |
| Jul 2000 | $5.38 | $5.39 | $4.91 | $5.16 | -4.62% | 1,764,800 |
| Jun 2000 | $5.88 | $6.00 | $4.91 | $5.41 | -7.98% | 2,979,600 |
| May 2000 | $6.09 | $6.11 | $5.64 | $5.88 | -3.84% | 2,306,400 |
| Apr 2000 | $6.36 | $6.38 | $5.72 | $6.11 | -3.46% | 2,218,000 |
| Mar 2000 | $7.36 | $7.63 | $6.28 | $6.33 | -14.01% | 2,045,600 |
| Feb 2000 | $7.75 | $7.97 | $5.75 | $7.36 | -4.85% | 3,870,000 |
| Jan 2000 | $7.72 | $7.92 | $7.50 | $7.73 | 0.00% | 2,993,200 |
| Dec 1999 | $8.73 | $8.75 | $7.72 | $7.73 | -11.45% | 650,400 |
| Nov 1999 | $8.66 | $8.84 | $8.27 | $8.73 | +1.09% | 1,258,400 |
| Oct 1999 | $9.47 | $9.56 | $8.17 | $8.64 | -8.90% | 2,305,200 |
| Sep 1999 | $9.41 | $9.83 | $9.41 | $9.48 | +0.83% | 1,066,000 |
| Aug 1999 | $9.86 | $9.95 | $9.41 | $9.41 | -4.44% | 572,400 |
| Jul 1999 | $9.81 | $10.11 | $9.52 | $9.84 | +0.32% | 689,600 |
| Jun 1999 | $8.56 | $9.84 | $8.50 | $9.81 | +14.39% | 1,098,400 |
| May 1999 | $8.27 | $8.59 | $8.17 | $8.58 | +3.78% | 781,600 |
| Apr 1999 | $7.95 | $8.34 | $7.95 | $8.27 | +3.72% | 1,161,200 |
| Mar 1999 | $8.30 | $8.66 | $7.95 | $7.97 | -3.59% | 1,035,600 |
| Feb 1999 | $8.78 | $9.17 | $8.27 | $8.27 | -5.87% | 1,050,400 |
| Jan 1999 | $8.86 | $8.88 | $8.61 | $8.78 | -1.58% | 1,617,600 |
| Dec 1998 | $7.59 | $8.92 | $7.45 | $8.92 | +17.49% | 1,253,600 |
| Nov 1998 | $7.42 | $7.92 | $7.42 | $7.59 | +2.32% | 626,000 |
| Oct 1998 | $7.19 | $7.56 | $6.94 | $7.42 | +3.26% | 3,158,000 |
| Sep 1998 | $6.56 | $7.34 | $6.44 | $7.19 | +9.78% | 2,188,400 |
| Aug 1998 | $6.95 | $7.23 | $6.50 | $6.55 | -5.84% | 1,581,600 |
| Jul 1998 | $7.11 | $7.59 | $6.92 | $6.95 | -1.77% | 1,358,400 |
| Jun 1998 | $7.38 | $7.61 | $7.03 | $7.08 | -4.03% | 2,472,800 |
| May 1998 | $7.72 | $7.97 | $7.16 | $7.38 | -4.45% | 1,930,800 |
| Apr 1998 | $7.53 | $8.28 | $7.53 | $7.72 | +2.49% | 2,177,600 |
| Mar 1998 | $7.92 | $8.06 | $7.47 | $7.53 | -4.74% | 1,622,800 |
| Feb 1998 | $7.66 | $7.95 | $7.63 | $7.91 | +3.48% | 828,800 |
| Jan 1998 | $7.44 | $7.64 | $7.23 | $7.64 | +2.73% | 1,410,400 |
| Dec 1997 | $7.97 | $8.03 | $7.22 | $7.44 | -6.30% | 2,348,400 |
| Nov 1997 | $8.38 | $8.66 | $7.91 | $7.94 | -5.58% | 1,446,800 |
| Oct 1997 | $8.22 | $8.77 | $7.92 | $8.41 | +1.89% | 2,134,000 |
| Sep 1997 | $7.80 | $8.55 | $7.75 | $8.25 | +6.02% | 2,204,800 |
| Aug 1997 | $7.36 | $7.94 | $7.31 | $7.78 | +5.96% | 2,268,400 |
| Jul 1997 | $7.16 | $7.63 | $7.13 | $7.34 | +2.62% | 2,055,200 |
| Jun 1997 | $7.38 | $7.50 | $7.03 | $7.16 | -2.97% | 2,536,800 |
| May 1997 | $7.00 | $7.38 | $6.97 | $7.38 | +5.83% | 1,004,000 |
| Apr 1997 | $6.78 | $7.03 | $6.78 | $6.97 | +2.76% | 788,800 |
| Mar 1997 | $6.97 | $6.97 | $6.75 | $6.78 | -2.69% | 768,400 |
| Feb 1997 | $7.03 | $7.31 | $6.88 | $6.97 | +0.45% | 900,000 |
| Jan 1997 | $7.03 | $7.06 | $6.91 | $6.94 | -1.77% | 1,178,800 |
| Dec 1996 | $7.16 | $7.31 | $7.03 | $7.06 | -1.31% | 750,800 |
| Nov 1996 | $6.69 | $7.16 | $6.69 | $7.16 | +6.51% | 713,600 |
| Oct 1996 | $6.47 | $6.84 | $6.47 | $6.72 | +3.86% | 689,200 |
| Sep 1996 | $6.25 | $6.66 | $6.19 | $6.47 | +3.50% | 1,328,800 |
| Aug 1996 | $5.94 | $6.25 | $5.91 | $6.25 | +6.38% | 901,200 |
| Jul 1996 | $7.31 | $7.31 | $5.88 | $5.88 | -21.67% | 1,327,600 |
| Jun 1996 | $6.19 | $7.50 | $6.19 | $7.50 | +20.60% | 1,482,000 |
| May 1996 | $5.66 | $6.25 | $5.56 | $6.22 | +9.34% | 2,234,400 |
| Apr 1996 | $5.81 | $5.84 | $5.63 | $5.69 | -2.15% | 1,438,400 |
| Mar 1996 | $5.75 | $5.97 | $5.53 | $5.81 | +0.54% | 1,795,200 |
| Feb 1996 | $6.16 | $6.22 | $5.66 | $5.78 | -6.56% | 2,107,200 |
| Jan 1996 | $5.88 | $6.19 | $5.75 | $6.19 | +5.32% | 980,000 |
| Dec 1995 | $6.00 | $6.16 | $5.66 | $5.88 | -2.08% | 5,720,000 |
| Nov 1995 | $6.22 | $6.59 | $6.00 | $6.00 | -3.03% | 1,062,000 |
| Oct 1995 | $7.00 | $7.00 | $6.06 | $6.19 | -12.00% | 2,277,600 |
| Sep 1995 | $7.47 | $7.66 | $7.00 | $7.03 | -5.86% | 994,400 |
| Aug 1995 | $7.25 | $7.47 | $7.06 | $7.47 | +3.02% | 528,800 |
| Jul 1995 | $7.00 | $7.38 | $7.00 | $7.25 | +3.57% | 570,000 |
| Jun 1995 | $7.03 | $7.09 | $6.88 | $7.00 | -0.45% | 594,000 |
| May 1995 | $7.00 | $7.25 | $6.97 | $7.03 | +0.45% | 605,600 |
| Apr 1995 | $6.38 | $7.00 | $6.38 | $7.00 | +9.80% | 1,704,400 |
| Mar 1995 | $6.50 | $6.50 | $6.19 | $6.38 | -1.92% | 1,568,400 |
| Feb 1995 | $6.75 | $6.75 | $6.38 | $6.50 | -3.70% | 567,200 |
| Jan 1995 | $6.88 | $6.88 | $6.69 | $6.75 | -1.82% | 713,200 |
| Dec 1994 | $6.56 | $6.88 | $6.53 | $6.88 | +5.26% | 692,800 |
| Nov 1994 | $7.03 | $7.28 | $6.53 | $6.53 | -7.11% | 1,264,000 |
| Oct 1994 | $6.38 | $7.13 | $6.38 | $7.03 | +10.29% | 902,000 |
| Sep 1994 | $6.25 | $6.38 | $6.13 | $6.38 | +1.49% | 716,400 |
| Aug 1994 | $5.75 | $6.44 | $5.75 | $6.28 | +8.65% | 1,433,200 |
| Jul 1994 | $5.41 | $6.00 | $5.41 | $5.78 | +6.94% | 1,233,200 |
| Jun 1994 | $5.44 | $5.66 | $5.31 | $5.41 | -1.14% | 833,600 |
| May 1994 | $5.88 | $5.94 | $5.47 | $5.47 | -6.91% | 644,000 |
| Apr 1994 | $6.13 | $6.19 | $5.88 | $5.88 | -5.05% | 871,600 |
| Mar 1994 | $6.25 | $6.28 | $6.09 | $6.19 | -1.49% | 994,800 |
| Feb 1994 | $6.41 | $6.44 | $6.19 | $6.28 | -1.95% | 731,200 |
| Jan 1994 | $6.09 | $6.41 | $5.94 | $6.41 | +4.59% | 2,332,000 |
| Dec 1993 | $6.09 | $6.22 | $6.06 | $6.13 | +0.51% | 334,400 |
| Nov 1993 | $5.94 | $6.22 | $5.94 | $6.09 | +2.63% | 564,000 |
| Oct 1993 | $6.09 | $6.09 | $5.88 | $5.94 | -2.56% | 600,000 |
| Sep 1993 | $6.09 | $6.31 | $6.06 | $6.09 | +0.52% | 459,200 |
| Aug 1993 | $6.03 | $6.09 | $5.88 | $6.06 | +1.57% | 752,400 |
| Jul 1993 | $5.81 | $6.25 | $5.75 | $5.97 | +2.69% | 629,200 |
| Jun 1993 | $5.81 | $5.88 | $5.75 | $5.81 | +0.54% | 382,400 |
| May 1993 | $5.75 | $5.84 | $5.69 | $5.78 | 0.00% | 383,200 |
| Apr 1993 | $5.84 | $5.88 | $5.59 | $5.78 | -1.59% | 457,600 |
| Mar 1993 | $5.06 | $5.88 | $5.06 | $5.88 | +17.50% | 602,000 |
| Feb 1993 | $5.59 | $6.09 | $4.97 | $5.00 | -10.62% | 692,800 |
| Jan 1993 | $5.59 | $5.66 | $5.44 | $5.59 | -0.55% | 646,400 |
| Dec 1992 | $5.56 | $5.66 | $5.34 | $5.63 | +0.56% | 658,000 |
| Nov 1992 | $5.28 | $5.84 | $5.28 | $5.59 | +5.30% | 563,600 |
| Oct 1992 | $5.38 | $5.38 | $5.16 | $5.31 | -1.16% | 3,090,400 |
| Sep 1992 | $5.38 | $5.53 | $5.06 | $5.38 | 0.00% | 641,200 |
| Aug 1992 | $5.78 | $6.03 | $5.38 | $5.38 | -7.03% | 798,800 |
| Jul 1992 | $5.81 | $5.88 | $5.66 | $5.78 | -1.07% | 990,400 |
| Jun 1992 | $5.09 | $5.91 | $5.06 | $5.84 | +15.43% | 635,600 |
| May 1992 | $4.91 | $5.38 | $4.91 | $5.06 | +3.18% | 490,000 |
| Apr 1992 | $5.19 | $5.19 | $4.81 | $4.91 | -6.55% | 790,000 |
| Mar 1992 | $4.81 | $5.34 | $4.78 | $5.25 | +9.80% | 1,456,800 |
| Feb 1992 | $4.75 | $4.88 | $4.69 | $4.78 | +0.66% | 998,400 |
| Jan 1992 | $4.63 | $4.75 | $4.19 | $4.75 | +2.01% | 778,000 |
| Dec 1991 | $4.19 | $4.69 | $4.06 | $4.66 | +10.37% | 732,000 |
| Nov 1991 | $4.16 | $4.31 | $4.06 | $4.22 | +0.75% | 1,178,400 |
| Oct 1991 | $4.16 | $4.19 | $4.03 | $4.19 | +0.75% | 421,200 |
| Sep 1991 | $4.28 | $4.28 | $3.91 | $4.16 | -3.62% | 760,000 |
| Aug 1991 | $4.03 | $4.34 | $4.00 | $4.31 | +6.15% | 372,400 |
| Jul 1991 | $4.00 | $4.06 | $3.94 | $4.06 | +1.56% | 1,329,200 |
| Jun 1991 | $3.97 | $4.03 | $3.88 | $4.00 | 0.00% | 317,200 |
| May 1991 | $3.94 | $4.00 | $3.75 | $4.00 | +0.79% | 661,600 |
| Apr 1991 | $3.56 | $4.19 | $3.50 | $3.97 | +11.40% | 1,416,000 |
| Mar 1991 | $3.28 | $3.59 | $3.25 | $3.56 | +7.55% | 890,400 |
| Feb 1991 | $3.00 | $3.66 | $2.94 | $3.31 | +9.28% | 1,510,800 |
| Jan 1991 | $3.06 | $3.19 | $2.78 | $3.03 | -1.02% | 1,811,600 |
| Dec 1990 | $2.84 | $3.25 | $2.84 | $3.06 | +7.69% | 606,800 |
| Nov 1990 | $2.91 | $3.00 | $2.63 | $2.84 | -1.09% | 908,400 |
| Oct 1990 | $3.47 | $3.53 | $2.75 | $2.88 | -17.12% | 841,200 |
| Sep 1990 | $3.81 | $3.94 | $3.47 | $3.47 | -9.02% | 421,200 |
| Aug 1990 | $4.13 | $4.16 | $3.75 | $3.81 | -6.87% | 570,800 |
| Jul 1990 | $4.25 | $4.31 | $4.06 | $4.09 | -4.38% | 1,289,600 |
| Jun 1990 | $4.78 | $4.88 | $4.19 | $4.28 | -11.04% | 2,182,400 |
| May 1990 | $4.50 | $5.00 | $4.47 | $4.81 | +7.69% | 927,600 |
| Apr 1990 | $4.47 | $4.53 | $4.28 | $4.47 | -0.69% | 558,800 |
| Mar 1990 | $4.50 | $4.69 | $4.47 | $4.50 | 0.00% | 703,200 |
| Feb 1990 | $4.50 | $4.69 | $4.38 | $4.50 | +0.70% | 809,200 |
| Jan 1990 | $4.72 | $4.84 | $4.47 | $4.47 | -5.92% | 1,211,600 |
| Dec 1989 | $4.75 | $4.81 | $4.38 | $4.75 | -0.65% | 662,000 |
| Nov 1989 | $4.72 | $4.78 | $4.63 | $4.78 | +2.00% | 568,800 |
| Oct 1989 | $5.44 | $5.66 | $4.63 | $4.69 | -13.30% | 1,293,200 |
| Sep 1989 | $4.97 | $5.44 | $4.97 | $5.41 | +9.49% | 882,000 |
| Aug 1989 | $5.00 | $5.47 | $4.81 | $4.94 | 0.00% | 1,582,000 |
| Jul 1989 | $4.63 | $4.97 | $4.56 | $4.94 | +6.76% | 1,038,800 |
| Jun 1989 | $4.78 | $4.84 | $4.59 | $4.63 | -3.27% | 1,040,400 |
| May 1989 | $4.81 | $5.00 | $4.69 | $4.78 | 0.00% | 1,110,400 |
| Apr 1989 | $4.16 | $4.94 | $4.13 | $4.78 | +15.91% | 1,530,000 |
| Mar 1989 | $4.19 | $4.44 | $4.06 | $4.13 | -1.49% | 910,000 |
| Feb 1989 | $3.94 | $4.25 | $3.91 | $4.19 | +6.35% | 822,400 |
| Jan 1989 | $3.81 | $4.03 | $3.72 | $3.94 | +5.00% | 1,150,800 |
| Dec 1988 | $3.66 | $3.81 | $3.38 | $3.75 | +3.45% | 1,473,200 |
| Nov 1988 | $3.56 | $3.66 | $3.41 | $3.63 | +0.87% | 789,200 |
| Oct 1988 | $3.25 | $3.59 | $3.16 | $3.59 | +10.58% | 1,314,400 |
| Sep 1988 | $3.41 | $3.47 | $3.13 | $3.25 | -5.45% | 766,400 |
| Aug 1988 | $3.78 | $3.88 | $3.38 | $3.44 | -8.33% | 464,000 |
| Jul 1988 | $3.63 | $3.75 | $3.34 | $3.75 | +4.35% | 662,000 |
| Jun 1988 | $3.72 | $3.88 | $3.59 | $3.59 | -2.54% | 780,400 |
| May 1988 | $3.47 | $3.72 | $3.06 | $3.69 | +8.26% | 2,206,000 |
| Apr 1988 | $3.44 | $3.50 | $3.28 | $3.41 | 0.00% | 414,800 |
| Mar 1988 | $3.72 | $3.81 | $3.31 | $3.41 | -8.40% | 1,475,600 |
| Feb 1988 | $4.31 | $4.38 | $3.59 | $3.72 | -13.77% | 1,015,600 |
| Jan 1988 | $4.25 | $4.38 | $4.16 | $4.31 | +2.99% | 418,000 |
| Dec 1987 | $3.31 | $4.38 | $3.09 | $4.19 | +26.42% | 878,400 |
| Nov 1987 | $3.75 | $3.94 | $3.28 | $3.31 | -11.67% | 878,800 |
| Oct 1987 | $4.91 | $5.13 | $3.13 | $3.75 | -23.57% | 1,640,000 |
| Sep 1987 | $5.19 | $5.41 | $4.38 | $4.91 | -5.42% | 1,451,200 |
| Aug 1987 | $5.13 | $5.47 | $4.78 | $5.19 | +1.22% | 780,400 |
| Jul 1987 | $5.06 | $5.47 | $5.00 | $5.13 | +1.23% | 874,400 |
| Jun 1987 | $5.00 | $5.53 | $4.91 | $5.06 | +1.57% | 1,317,600 |
| May 1987 | $5.02 | $5.05 | $4.83 | $4.98 | -0.31% | 749,600 |
| Apr 1987 | $4.69 | $5.23 | $4.64 | $5.00 | +5.61% | 1,786,400 |
| Mar 1987 | $4.94 | $4.98 | $4.72 | $4.73 | -3.81% | 1,727,200 |
| Feb 1987 | $4.38 | $5.08 | $4.34 | $4.92 | +12.50% | 2,286,400 |
| Jan 1987 | $3.53 | $4.58 | $3.53 | $4.38 | +23.89% | 1,672,800 |
| Dec 1986 | $3.42 | $3.73 | $3.38 | $3.53 | +3.20% | 1,588,800 |
| Nov 1986 | $3.38 | $3.56 | $3.33 | $3.42 | +1.39% | 1,054,400 |
| Oct 1986 | $3.30 | $3.39 | $3.06 | $3.38 | +2.37% | 1,317,600 |
| Sep 1986 | $3.52 | $3.56 | $3.30 | $3.30 | -6.22% | 772,800 |
| Aug 1986 | $3.59 | $3.69 | $3.48 | $3.52 | -2.18% | 333,600 |
| Jul 1986 | $3.73 | $3.73 | $3.44 | $3.59 | -4.17% | 776,800 |
| Jun 1986 | $4.23 | $4.25 | $3.73 | $3.75 | -11.44% | 615,200 |
| May 1986 | $3.89 | $4.28 | $3.86 | $4.23 | +8.84% | 571,200 |
| Apr 1986 | $3.91 | $4.02 | $3.67 | $3.89 | -0.40% | 2,276,800 |
| Mar 1986 | $3.73 | $3.97 | $3.73 | $3.91 | +5.49% | 1,204,800 |
| Feb 1986 | $3.45 | $3.70 | $3.44 | $3.70 | +7.24% | 1,106,400 |
| Jan 1986 | $3.25 | $3.50 | $3.25 | $3.45 | +6.76% | 1,270,400 |
| Dec 1985 | $2.95 | $3.28 | $2.91 | $3.23 | +9.53% | 1,311,200 |
| Nov 1985 | $2.89 | $3.13 | $2.83 | $2.95 | +2.16% | 1,675,200 |
| Oct 1985 | $2.97 | $3.16 | $2.84 | $2.89 | -2.63% | 916,000 |
| Sep 1985 | $3.25 | $3.28 | $2.94 | $2.97 | -8.65% | 616,000 |
| Aug 1985 | $3.38 | $3.39 | $3.14 | $3.25 | -3.70% | 1,012,800 |
| Jul 1985 | $3.05 | $3.41 | $3.02 | $3.38 | +10.77% | 2,032,000 |
| Jun 1985 | $3.19 | $3.22 | $2.98 | $3.05 | -4.41% | 464,000 |
| May 1985 | $2.77 | $3.41 | $2.70 | $3.19 | +15.26% | 2,260,800 |
| Apr 1985 | $2.59 | $2.84 | $2.50 | $2.77 | +6.62% | 1,091,200 |
| Mar 1985 | $2.56 | $2.72 | $2.50 | $2.59 | +1.22% | 1,190,400 |
| Feb 1985 | $2.61 | $2.64 | $2.47 | $2.56 | -1.80% | 1,242,400 |
| Jan 1985 | $2.20 | $2.61 | $2.19 | $2.61 | +18.44% | 961,600 |
| Dec 1984 | $2.22 | $2.25 | $2.13 | $2.20 | -0.71% | 1,435,200 |
| Nov 1984 | $2.31 | $2.47 | $2.19 | $2.22 | -2.07% | 1,202,400 |
| Oct 1984 | $2.22 | $2.39 | $2.19 | $2.27 | +1.40% | 1,040,800 |
| Sep 1984 | $2.28 | $2.30 | $2.19 | $2.23 | -2.06% | 1,044,800 |
| Aug 1984 | $2.23 | $2.41 | $2.13 | $2.28 | +2.10% | 2,542,400 |
| Jul 1984 | $2.89 | $3.03 | $2.03 | $2.23 | -23.12% | 1,972,000 |
| Jun 1984 | $2.63 | $2.94 | $2.63 | $2.91 | +10.72% | 1,160,000 |
| May 1984 | $3.03 | $3.09 | $2.61 | $2.63 | -12.95% | 1,100,800 |
| Apr 1984 | $3.16 | $3.25 | $2.91 | $3.02 | -4.46% | 1,296,800 |
| Mar 1984 | $3.17 | $3.27 | $2.95 | $3.16 | -0.98% | 830,400 |
| Feb 1984 | $3.33 | $3.36 | $2.84 | $3.19 | -4.22% | 1,537,600 |
| Jan 1984 | $3.25 | $3.55 | $3.20 | $3.33 | +2.40% | 1,421,600 |
| Dec 1983 | $3.48 | $3.48 | $3.17 | $3.25 | -7.55% | 1,132,000 |
| Nov 1983 | $3.53 | $3.72 | $3.47 | $3.52 | -0.44% | 668,800 |
| Oct 1983 | $3.59 | $4.09 | $3.45 | $3.53 | -1.74% | 1,917,600 |
| Sep 1983 | $3.78 | $3.92 | $3.50 | $3.59 | -4.96% | 1,118,400 |
| Aug 1983 | $3.50 | $3.78 | $3.17 | $3.78 | +7.56% | 1,032,800 |
| Jul 1983 | $3.33 | $3.70 | $3.19 | $3.52 | +6.13% | 1,423,200 |
| Jun 1983 | $3.06 | $3.42 | $2.97 | $3.31 | +8.16% | 785,600 |
| May 1983 | $3.13 | $3.41 | $3.02 | $3.06 | -2.00% | 900,000 |
| Apr 1983 | $2.73 | $3.16 | $2.63 | $3.13 | +13.64% | 2,186,400 |
| Mar 1983 | $2.77 | $3.03 | $2.73 | $2.75 | -0.56% | 1,296,800 |
| Feb 1983 | $2.53 | $2.78 | $2.34 | $2.77 | +9.26% | 1,557,600 |
| Jan 1983 | $2.42 | $2.59 | $2.39 | $2.53 | +4.52% | 2,146,400 |
| Dec 1982 | $2.38 | $2.70 | $2.33 | $2.42 | +1.97% | 2,658,400 |
| Nov 1982 | $2.69 | $2.78 | $2.14 | $2.38 | -11.63% | 4,716,000 |
| Oct 1982 | $1.94 | $2.86 | $1.92 | $2.69 | +38.71% | 13,464,000 |
| Sep 1982 | $1.94 | $2.16 | $1.89 | $1.94 | 0.00% | 1,400,000 |
| Aug 1982 | $1.73 | $2.00 | $1.52 | $1.94 | +11.71% | 2,714,400 |
| Jul 1982 | $2.00 | $2.22 | $1.64 | $1.73 | -13.28% | 3,090,400 |
| Jun 1982 | $1.97 | $2.09 | $1.95 | $2.00 | +1.58% | 1,132,800 |
| May 1982 | $2.20 | $2.36 | $1.94 | $1.97 | -10.64% | 1,900,800 |
| Apr 1982 | $2.09 | $2.27 | $2.09 | $2.20 | +6.02% | 1,062,400 |
| Mar 1982 | $2.19 | $2.19 | $1.80 | $2.08 | -5.67% | 3,078,400 |
| Feb 1982 | $2.18 | $2.38 | $2.17 | $2.20 | +1.44% | 1,904,000 |
| Jan 1982 | $2.38 | $2.39 | $1.95 | $2.17 | -8.55% | 1,753,600 |
| Dec 1981 | $2.34 | $2.44 | $2.32 | $2.38 | +1.33% | 1,560,000 |
| Nov 1981 | $1.97 | $2.36 | $1.95 | $2.34 | +19.05% | 2,651,200 |
| Oct 1981 | $1.55 | $1.97 | $1.55 | $1.97 | +26.64% | 1,371,200 |
| Sep 1981 | $1.64 | $1.71 | $1.45 | $1.55 | -5.24% | 1,515,200 |
| Aug 1981 | $1.91 | $1.96 | $1.60 | $1.64 | -13.94% | 987,200 |
| Jul 1981 | $1.80 | $1.96 | $1.66 | $1.91 | +6.09% | 1,257,600 |
| Jun 1981 | $1.98 | $1.98 | $1.73 | $1.80 | -9.45% | 1,276,800 |
| May 1981 | $1.95 | $2.08 | $1.91 | $1.98 | +2.42% | 1,526,400 |
| Apr 1981 | $1.59 | $2.00 | $1.58 | $1.94 | +21.56% | 2,942,400 |
| Mar 1981 | $1.38 | $1.65 | $1.37 | $1.59 | +15.91% | 3,035,200 |
| Feb 1981 | $1.28 | $1.38 | $1.20 | $1.38 | +6.66% | 987,200 |
| Jan 1981 | $1.37 | $1.41 | $1.24 | $1.29 | -4.62% | 1,588,800 |
| Dec 1980 | $1.33 | $1.35 | $1.16 | $1.35 | +1.77% | 1,027,200 |
| Nov 1980 | $1.29 | $1.38 | $1.20 | $1.33 | +3.03% | 1,603,200 |
| Oct 1980 | $1.20 | $1.36 | $1.19 | $1.29 | +7.15% | 2,185,600 |
| Sep 1980 | $1.19 | $1.39 | $1.17 | $1.20 | +6.94% | 6,264,000 |
| Aug 1980 | $0.9844 | $1.17 | $0.9531 | $1.13 | +14.29% | 5,456,000 |
| Jul 1980 | $0.8594 | $1.06 | $0.8281 | $0.9844 | +16.67% | 2,118,400 |
| Jun 1980 | $0.7969 | $0.9219 | $0.7969 | $0.8438 | +5.88% | 1,211,200 |
| May 1980 | $0.7656 | $0.8594 | $0.7188 | $0.7969 | +4.08% | 1,216,000 |
| Apr 1980 | $0.7344 | $0.8438 | $0.7031 | $0.7656 | +4.26% | 947,200 |
| Mar 1980 | $0.7813 | $0.8281 | $0.6875 | $0.7344 | – | 361,600 |
Seasonality
WST 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% | -3.7% | 2.8% | 5.1% | 1.5% | 4.8% | 5.5% | 2.9% | -1.0% | -0.7% | 2.8% | -0.0% |
| Months up | 7 of 10 | 2 of 10 | 7 of 10 | 7 of 10 | 5 of 10 | 7 of 10 | 6 of 10 | 8 of 10 | 4 of 10 | 6 of 10 | 7 of 9 | 6 of 9 |
| 2026 | -15.9% | 10.0% | -1.5% | 18.8% | 8.5% | 11.2% | -5.0% | 0.0% | 8.7% | 11.3% | ||
| 2025 | 4.3% | -31.9% | -3.6% | -5.5% | -0.2% | 3.8% | 9.4% | 3.2% | 6.2% | 7.5% | -1.6% | -0.8% |
| 2024 | 6.0% | -3.9% | 10.4% | -9.6% | -7.3% | -0.6% | -7.0% | 2.4% | -4.3% | 2.6% | 5.8% | 0.6% |
| 2023 | 12.9% | 19.4% | 9.3% | 4.3% | -7.4% | 14.3% | -3.7% | 10.6% | -7.8% | -15.2% | 10.3% | 0.4% |
| 2022 | -16.1% | -1.6% | 6.1% | -23.3% | -1.5% | -2.6% | 13.7% | -13.6% | -17.1% | -6.5% | 2.1% | 0.3% |
| 2021 | 5.8% | -6.3% | 0.4% | 16.7% | 5.8% | 3.3% | 14.7% | 9.7% | -6.0% | 1.3% | 3.0% | 6.0% |
| 2020 | 3.8% | -3.5% | 1.1% | 24.4% | 14.1% | 5.2% | 18.4% | 5.6% | -3.2% | -1.0% | 1.2% | 3.0% |
| 2019 | 10.6% | -3.3% | 5.2% | 12.5% | -7.4% | 9.2% | 9.8% | 6.0% | -2.5% | 1.5% | 2.2% | 2.2% |
| 2018 | 1.7% | -13.0% | 1.2% | 0.1% | 5.4% | 6.8% | 10.6% | 6.7% | 5.5% | -14.1% | 3.4% | -10.5% |
| 2017 | -0.1% | -2.6% | -1.0% | 13.0% | 5.4% | -2.6% | -6.0% | -1.9% | 10.6% | 5.5% | -1.4% | -1.3% |