Gemstar-TV Guide International, Inc. (GMST) is at an implied volatility extreme high of 143.37% that is greater than 98.72% of past values prior to 4/16/2008 (Close Price 4.74). On prior close, 4/15/2008, the implied volatility was 37.25% and at the 3.35 percentile. Closing price was 4.78.

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