Put-Call Implied Volatility Ratio (20-Day)

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

Charles River Laboratories International, Inc. (CRL) had 20-Day Put-Call Implied Volatility Ratio of 1.0392 for 2026-10-16.

Over 300 data fields encompassing historical volatility, implied volatility, and put-call ratios for multiple time frames
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Figures for 2026-10-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3611
Historical Volatility (Parkinson)	0.4277
Implied Volatility (Calls)	0.6185
Implied Volatility (Puts)	0.6428
Implied Volatility (Mean)	0.6307
Put-Call Implied Volatility Ratio	1.0392
Implied Volatility Skew	-0.0088
Option Statistics
Put-Call Ratio (Volume)	0.8571
Put-Call Ratio (Open Interest)	0.2292