Put-Call Implied Volatility Ratio (20-Day)
Put-Call Implied Volatility Ratio: The ratio of implied volatilities of the at-the-money puts to the at-the-money calls.
Amphastar Pharmaceuticals, Inc. (AMPH) had 20-Day Put-Call Implied Volatility Ratio of 1.3303 for 2026-09-04.
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