USANA Health Sciences, Inc. (USNA) is at an implied volatility extreme low of 26.78% that is less than 98.84% of past values prior to 6/13/2008 (Close Price 25.97). On prior close, 6/12/2008, the implied volatility was 35.55% and at the 21.63 percentile. Closing price was 25.70.

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