Implied Volatility Skew (30-Day)

Implied Volatility Skew: A measurement that quantifies the difference in implied volatility of options at lower and higher strike prices.

SPDR MSCI EAFE Fossil Fuel Reserves Free ETF (EFAX) had 30-Day Implied Volatility Skew of 0.0663 for 2025-05-30.

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 2025-05-30

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1127
Historical Volatility (Parkinson)	0.0690
Implied Volatility (Calls)	0.2046
Implied Volatility (Puts)	0.1637
Implied Volatility (Mean)	0.1841
Put-Call Implied Volatility Ratio	0.8001
Implied Volatility Skew	0.0663
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	--