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 5.4697 for 2025-10-13.

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Figures for 2025-10-13

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1561
Historical Volatility (Parkinson)	0.1295
Implied Volatility (Calls)	0.1980
Implied Volatility (Puts)	0.1890
Implied Volatility (Mean)	0.1935
Put-Call Implied Volatility Ratio	0.9546
Implied Volatility Skew	0.0507
Option Statistics
Put-Call Ratio (Volume)	4.2255
Put-Call Ratio (Open Interest)	5.4697