Put-Call Ratio (Open Interest) (20-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.

State Street SPDR Portfolio S&P 1500 Composite Stock Market ETF (SPTM) had 20-Day Put-Call Ratio (Open Interest) of 0.2000 for 2026-04-20.

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Volatility Metrics
Historical Volatility (Close-to-Close)	0.1157
Historical Volatility (Parkinson)	0.0968
Implied Volatility (Calls)	0.1523
Implied Volatility (Puts)	0.1636
Implied Volatility (Mean)	0.1580
Put-Call Implied Volatility Ratio	1.0741
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	2.0000
Put-Call Ratio (Open Interest)	0.2000