Put-Call Ratio (Volume) (90-Day)

Put-Call Ratio (Volume): The ratio of puts traded to calls traded, for options with the relevant expiration date.

ACM Research, Inc. (ACMR) had 90-Day Put-Call Ratio (Volume) of 1.5267 for 2026-07-21.

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Figures for 2026-07-21

Volatility Metrics
Historical Volatility (Close-to-Close)	1.0893
Historical Volatility (Parkinson)	0.8766
Implied Volatility (Calls)	1.1123
Implied Volatility (Puts)	1.1412
Implied Volatility (Mean)	1.1267
Put-Call Implied Volatility Ratio	1.0260
Implied Volatility Skew	0.0068
Option Statistics
Put-Call Ratio (Volume)	1.5267
Put-Call Ratio (Open Interest)	2.3331