Put-Call Ratio (Open Interest) (180-Day)

Put-Call Ratio (Open Interest): The ratio of outstanding put contracts to outstanding call contracts at the close of the trading day, for options with the relevant expiration date.

Graham Corporation (GHM) had 180-Day Put-Call Ratio (Open Interest) of 0.0865 for 2026-05-22.

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Figures for 2026-05-22

Volatility Metrics
Historical Volatility (Close-to-Close)	0.5140
Historical Volatility (Parkinson)	0.5265
Implied Volatility (Calls)	0.5984
Implied Volatility (Puts)	0.6139
Implied Volatility (Mean)	0.6062
Put-Call Implied Volatility Ratio	1.0259
Implied Volatility Skew	0.0158
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	0.0865