Factset Research Systems Inc. options tape
Read from CBOE's delayed chain on 23 September 2026, with Factset Research Systems Inc. at $284.10: open interest within 90 days was 2,168 call and 6,958 put contracts, a put/call ratio of 3.21; the day's volume was 84 calls and 455 puts (5.42). The most call open interest sits at the $280.00 strike (444 contracts) and the most put open interest at $260.00 (1,793). The at-the-money straddle for 16 October 2026, 23 days out, was priced at 11.3% of spot. For 16 October 2026, implied volatility was 50.4% at the put 5% below spot and 52.6% at the call 5% above, -2.2 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $280.00 | 444 |
| Puts | $260.00 | 1,793 |
The strike with the most open interest on each side, across expiries within 90 days.
Open interest built since 22 September 2026
| Contract | Open interest now | Change |
|---|---|---|
| 16 October 2026 call at $280.00 | 419 | +398 |
Contracts whose open interest rose by 250 or more against the previous day's snapshot.
Source
CBOE delayed quotes for FDS, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
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