Put-Call Ratio (Volume) (120-Day)

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

Energy Recovery, Inc. (ERII) had 120-Day Put-Call Ratio (Volume) of 0.0544 for 2026-03-06.

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Figures for 2026-03-06

Volatility Metrics
Historical Volatility (Close-to-Close)	0.8202
Historical Volatility (Parkinson)	0.3580
Implied Volatility (Calls)	0.7074
Implied Volatility (Puts)	0.8027
Implied Volatility (Mean)	0.7551
Put-Call Implied Volatility Ratio	1.1347
Implied Volatility Skew	0.0282
Option Statistics
Put-Call Ratio (Volume)	0.0544
Put-Call Ratio (Open Interest)	0.1426