Put-Call Ratio (Open Interest) (90-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 90-Day Put-Call Ratio (Open Interest) of 2.4854 for 2026-04-16.

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Figures for 2026-04-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.5700
Historical Volatility (Parkinson)	0.5319
Implied Volatility (Calls)	0.6193
Implied Volatility (Puts)	0.6232
Implied Volatility (Mean)	0.6212
Put-Call Implied Volatility Ratio	1.0063
Implied Volatility Skew	0.0327
Option Statistics
Put-Call Ratio (Volume)	0.2241
Put-Call Ratio (Open Interest)	2.4854