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(CBOE: )

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Historical Prices

Month:
Year:
Range:
Date Open High Low Close Volume Change (%)
May 24, 2011 48.10 48.56 47.11 47.67 0 -0.63(-1.30%)
May 23, 2011 51.60 51.60 48.25 48.30 0 -1.59(-3.19%)
May 20, 2011 51.51 51.98 49.61 49.89 0 -1.68(-3.26%)
May 19, 2011 53.35 53.95 51.55 51.57 0 -3.08(-5.64%)
May 18, 2011 58.27 58.33 54.57 54.65 0 -5.86(-9.68%)
May 17, 2011 64.32 64.81 59.94 60.51 0 -5.48(-8.30%)
May 16, 2011 65.93 66.27 62.50 65.99 0 +2.91(+4.61%)
May 13, 2011 63.23 67.36 62.84 63.08 0 -1.24(-1.93%)
May 12, 2011 64.93 67.27 63.37 64.32 0 +3.34(+5.48%)
May 11, 2011 57.86 62.09 56.60 60.98 0 +2.45(+4.19%)
May 10, 2011 62.96 63.25 58.16 58.53 0 -5.76(-8.96%)
May 09, 2011 68.85 68.85 64.16 64.29 0 -2.21(-3.32%)
May 06, 2011 70.89 70.89 65.74 66.50 0 -5.58(-7.74%)
May 05, 2011 61.25 72.43 60.95 72.08 0 +12.68(+21.35%)
May 04, 2011 59.06 62.72 58.79 59.40 0 -1.22(-2.01%)
May 03, 2011 58.74 61.43 57.34 60.62 0 +0.16(+0.26%)
May 02, 2011 59.00 60.46 59.00 60.46 0 +6.75(+12.57%)
Apr 29, 2011 53.68 54.62 52.85 53.71 0 +0.72(+1.36%)
Apr 28, 2011 53.25 54.94 51.77 52.99 0 +0.98(+1.88%)
Apr 27, 2011 50.50 52.10 49.78 52.01 0 +1.14(+2.24%)
Apr 26, 2011 48.33 52.67 48.33 50.87 0 -3.61(-6.63%)
Apr 25, 2011 52.65 54.83 51.90 54.48 0 +7.32(+15.52%)
Apr 21, 2011 43.91 47.25 43.44 47.16 0 +4.10(+9.52%)
Apr 20, 2011 41.07 43.70 39.98 43.06 0 +2.50(+6.16%)
Apr 19, 2011 44.66 44.66 40.40 40.56 0 -3.19(-7.29%)
Apr 18, 2011 43.25 51.24 42.42 43.75 0 +2.19(+5.27%)
Apr 15, 2011 40.91 42.15 40.86 41.56 0 +1.14(+2.82%)
Apr 14, 2011 39.68 40.57 38.96 40.42 0 +0.91(+2.30%)
Apr 13, 2011 39.18 40.14 38.93 39.51 0 -0.55(-1.37%)
Apr 12, 2011 40.18 41.51 39.72 40.06 0 -0.17(-0.42%)
Apr 11, 2011 37.99 40.44 37.53 40.23 0 +3.15(+8.50%)
Apr 08, 2011 36.31 37.08 35.74 37.08 0 +0.97(+2.69%)
Apr 07, 2011 36.84 36.85 35.54 36.11 0 -0.48(-1.31%)
Apr 06, 2011 36.75 36.91 36.08 36.59 0 +0.11(+0.30%)
Apr 05, 2011 36.88 37.01 36.16 36.48 0 +0.02(+0.05%)
Apr 04, 2011 37.91 37.91 36.46 36.46 0 -0.63(-1.70%)
Apr 01, 2011 38.03 38.33 37.02 37.09 0 -0.68(-1.80%)
Mar 31, 2011 38.34 38.89 37.62 37.77 0 -0.33(-0.87%)
Mar 30, 2011 39.03 39.40 38.03 38.10 0 -0.97(-2.48%)
Mar 29, 2011 39.84 39.86 38.89 39.07 0 -0.92(-2.30%)
Mar 28, 2011 41.07 41.07 39.71 39.99 0 +0.44(+1.11%)
Mar 25, 2011 40.21 40.41 39.33 39.55 0 -1.04(-2.56%)
Mar 24, 2011 40.05 40.87 39.71 40.59 0 +1.41(+3.60%)
Mar 23, 2011 40.16 40.18 39.01 39.18 0 -1.18(-2.92%)
Mar 22, 2011 40.42 41.07 40.24 40.36 0 -0.32(-0.79%)
Mar 21, 2011 40.99 41.05 40.26 40.68 0 -1.62(-3.83%)
Mar 18, 2011 44.06 44.13 41.85 42.30 0 -2.45(-5.47%)
Mar 17, 2011 45.05 45.42 44.43 44.75 0 -1.22(-2.65%)
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