Put-Call Ratio (Open Interest) (120-Day)

Put-Call Ratio (Open Interest): The ratio of outstanding put contracts to outstanding call contracts at the close of the trading day, for options with the relevant expiration date.

Casella Waste Systems, Inc. (CWST) had 120-Day Put-Call Ratio (Open Interest) of 0.4978 for 2026-01-16.

For much more extensive volatility insights, check out our new product VolVue:

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 2026-01-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.2945
Historical Volatility (Parkinson)	0.2741
Implied Volatility (Calls)	0.2502
Implied Volatility (Puts)	0.2843
Implied Volatility (Mean)	0.2672
Put-Call Implied Volatility Ratio	1.1363
Implied Volatility Skew	0.0252
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	0.4978