Implied Volatility Skew (120-Day)

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

ProShares Ultra Nasdaq Biotechnology (BIB) had 120-Day Implied Volatility Skew of 0.0151 for 2026-09-03.

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 2026-09-03

Volatility Metrics
Historical Volatility (Close-to-Close)	0.4761
Historical Volatility (Parkinson)	0.3091
Implied Volatility (Calls)	0.4384
Implied Volatility (Puts)	0.4583
Implied Volatility (Mean)	0.4483
Put-Call Implied Volatility Ratio	1.0453
Implied Volatility Skew	0.0151
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	0.1169