WSO Open Interest
Watsco Inc (WSO) had 4.84K open option contracts as of Nov 4, 2026: 4.09K calls and 745 puts. Open interest rose 9.8% over the past four weeks, and is WSO's highest level in 8 weeks. The put/call open interest ratio is 0.18, so calls outnumber puts.
Open Interest by Strike
Showing results for WSO, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for WSO, 2026-11-20(m), calls & puts
| Call Open Interest Total | |
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| Put Open Interest Total | |
| Open Interest Total | |
| Put-Call Open Interest Ratio |
Highest Open Interest Options
Showing results for WSO, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for WSO, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for WSO, all expirations, calls & puts. View full history
WSO Open Interest FAQ
What is open interest?
Open interest is the number of option contracts that are open and not yet closed, exercised, or expired. The Options Clearing Corporation calculates it once a day from the previous day's trades, and it is published before the market opens.
How much open interest does WSO have?
Watsco had 4.84K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 4.49K contracts.
Is WSO open interest rising or falling?
Open interest rose 9.8% over the past four weeks, and is WSO's highest level in 8 weeks. It was 4.4K contracts on Oct 7, 2026. See the WSO open interest history for a longer view.
What is the WSO put/call open interest ratio?
The Watsco put/call open interest ratio was 0.18 as of Nov 4, 2026. Four weeks earlier it was 0.19.
What is Watsco Inc?
Watsco is the largest HVAC and refrigeration products distributor in North America with approximately 13% market share.