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 FTSE All-World ex-US Small-Cap Index Fund ETF Shares (VSS) had 90-Day Put-Call Implied Volatility Ratio of 0.8814 for 2026-07-20.

Over 300 data fields encompassing historical volatility, implied volatility, and put-call ratios for multiple time frames
Download data in CSV, Excel, JSON, or XML format
Up to 20 years of data history
52-Week Rank and Percentile for all metrics and time frames

10-Day 20-Day 30-Day 60-Day
90-Day 120-Day 150-Day 180-Day

Figures for 2026-07-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1920
Historical Volatility (Parkinson)	0.1097
Implied Volatility (Calls)	0.2034
Implied Volatility (Puts)	0.1793
Implied Volatility (Mean)	0.1913
Put-Call Implied Volatility Ratio	0.8814
Implied Volatility Skew	0.0512
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	0.4000