Put-Call Implied Volatility Ratio (10-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 10-Day Put-Call Implied Volatility Ratio of 1.5232 for 2026-04-20.
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