CWT Open Interest
California Water Service (CWT) had 310 open option contracts as of Nov 4, 2026: 204 calls and 106 puts. Open interest rose 71.3% over the past four weeks, and is CWT's highest level in 4 weeks. The put/call open interest ratio is 0.52, so calls outnumber puts.
Open Interest by Strike
Showing results for CWT, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for CWT, 2026-11-20(m), calls & puts
| Call Open Interest Total | |
|---|---|
| Put Open Interest Total | |
| Open Interest Total | |
| Put-Call Open Interest Ratio |
Highest Open Interest Options
Showing results for CWT, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for CWT, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for CWT, all expirations, calls & puts. View full history
CWT 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 CWT have?
California Water Service had 310 open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 192 contracts.
Is CWT open interest rising or falling?
Open interest rose 71.3% over the past four weeks, and is CWT's highest level in 4 weeks. It was 181 contracts on Oct 7, 2026. See the CWT open interest history for a longer view.
What is the CWT put/call open interest ratio?
The California Water Service put/call open interest ratio was 0.52 as of Nov 4, 2026. Four weeks earlier it was 0.95.
What is California Water Service?
California Water Service Group is a U.S. water and utilities holding company based in California.