Put-Call Ratio (Open Interest) (120-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.

MKS Inc. (MKSI) had 120-Day Put-Call Ratio (Open Interest) of 0.5102 for 2026-05-29.

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Figures for 2026-05-29

Volatility Metrics
Historical Volatility (Close-to-Close)	0.5309
Historical Volatility (Parkinson)	0.5199
Implied Volatility (Calls)	0.6110
Implied Volatility (Puts)	0.6650
Implied Volatility (Mean)	0.6380
Put-Call Implied Volatility Ratio	1.0884
Implied Volatility Skew	0.0009
Option Statistics
Put-Call Ratio (Volume)	0.0549
Put-Call Ratio (Open Interest)	0.5102