Fortinet, Inc. options tape
Read from CBOE's delayed chain on 23 September 2026, with Fortinet, Inc. at $173.66: open interest within 90 days was 26,765 call and 28,961 put contracts, a put/call ratio of 1.08; the day's volume was 4,143 calls and 2,687 puts (0.65). The most call open interest sits at the $180.00 strike (2,938 contracts) and the most put open interest at $150.00 (3,030). The at-the-money straddle for 25 September 2026, 2 days out, was priced at 3.7% of spot. For 16 October 2026, implied volatility was 45.7% at the put 5% below spot and 44.4% at the call 5% above, +1.3 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $180.00 | 2,938 |
| Puts | $150.00 | 3,030 |
The strike with the most open interest on each side, across expiries within 90 days.
Source
CBOE delayed quotes for FTNT, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
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