FSTR Open Interest
Foster (Lb) Co (FSTR) had 228 open option contracts as of Nov 4, 2026: 168 calls and 60 puts. Open interest rose 78.1% over the past four weeks. The put/call open interest ratio is 0.36, so calls outnumber puts.
Open Interest by Strike
Showing results for FSTR, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for FSTR, 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 FSTR, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for FSTR, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for FSTR, all expirations, calls & puts. View full history
FSTR 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 FSTR have?
Foster (Lb) had 228 open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 163 contracts.
Is FSTR open interest rising or falling?
Open interest rose 78.1% over the past four weeks. It was 128 contracts on Oct 7, 2026. See the FSTR open interest history for a longer view.
What is the FSTR put/call open interest ratio?
The Foster (Lb) put/call open interest ratio was 0.36 as of Nov 4, 2026. Four weeks earlier it was 0.88.
What is Foster (Lb) Co?
L.B.