Put-Call Ratio (Open Interest) (30-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.

SPDR S&P MidCap 400 ETF (MDY) had 30-Day Put-Call Ratio (Open Interest) of 1.2967 for 2026-01-16.

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Figures for 2026-01-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1148
Historical Volatility (Parkinson)	0.0977
Implied Volatility (Calls)	0.1568
Implied Volatility (Puts)	0.1481
Implied Volatility (Mean)	0.1524
Put-Call Implied Volatility Ratio	0.9442
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	3.5882
Put-Call Ratio (Open Interest)	1.2967