MAIN Open Interest
Main Street Capital Corporation (MAIN) had 15.98K open option contracts as of Nov 9, 2026: 6.88K calls and 9.11K puts. Open interest fell 27.6% over the past four weeks. The put/call open interest ratio is 1.32, which signals bearish sentiment.
Open Interest by Strike
Showing results for MAIN, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for MAIN, 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 MAIN, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for MAIN, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for MAIN, all expirations, calls & puts. View full history
MAIN 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 MAIN have?
Main Street Capital had 15.98K open option contracts as of Nov 9, 2026. Over the past 30 days, open interest averaged 17.0K contracts.
Is MAIN open interest rising or falling?
Open interest fell 27.6% over the past four weeks. It was 22.08K contracts on Oct 12, 2026. See the MAIN open interest history for a longer view.
What is the MAIN put/call open interest ratio?
The Main Street Capital put/call open interest ratio was 1.32 as of Nov 9, 2026. Four weeks earlier it was 2.77.
What is Main Street Capital Corporation?
Main Street Capital Corp is a principal investment firm focused on providing customized long-term debt and equity capital solutions to lower middle market ("LMM") companies and debt capital to private ("Private Loan") companies owned by or in the process of being acquired by a private equity fund.