Put-Call Implied Volatility Ratio (90-Day)

Put-Call Implied Volatility Ratio: The ratio of implied volatilities of the at-the-money puts to the at-the-money calls.

Vanguard S&P Mid-Cap 400 Index Fund ETF Shares (IVOO) had 90-Day Put-Call Implied Volatility Ratio of 1.1962 for 2026-04-20.

Over 300 data fields encompassing historical volatility, implied volatility, and put-call ratios for multiple time frames
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Figures for 2026-04-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1844
Historical Volatility (Parkinson)	0.1477
Implied Volatility (Calls)	0.1696
Implied Volatility (Puts)	0.2029
Implied Volatility (Mean)	0.1862
Put-Call Implied Volatility Ratio	1.1962
Implied Volatility Skew	-0.0134
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	0.5000