MSEX Open Interest
Middlesex Water Co (MSEX) had 913 open option contracts as of Nov 4, 2026: 797 calls and 116 puts. Open interest rose 62.5% over the past four weeks. The put/call open interest ratio is 0.15, so calls outnumber puts.
Open Interest by Strike
Showing results for MSEX, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for MSEX, 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 MSEX, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for MSEX, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for MSEX, all expirations, calls & puts. View full history
MSEX 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 MSEX have?
Middlesex Water had 913 open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 708 contracts.
Is MSEX open interest rising or falling?
Open interest rose 62.5% over the past four weeks. It was 562 contracts on Oct 7, 2026. See the MSEX open interest history for a longer view.
What is the MSEX put/call open interest ratio?
The Middlesex Water put/call open interest ratio was 0.15 as of Nov 4, 2026. Four weeks earlier it was 0.23.
What is Middlesex Water Co?
Middlesex Water Co owns and operates regulated water utility and wastewater systems in the U.S.