Ecolab Inc. options tape
Read from CBOE's delayed chain on 23 September 2026, with Ecolab Inc. at $275.93: open interest within 90 days was 11,244 call and 3,460 put contracts, a put/call ratio of 0.31; the day's volume was 900 calls and 118 puts (0.13). The most call open interest sits at the $300.00 strike (4,285 contracts) and the most put open interest at $260.00 (1,996). The at-the-money straddle for 16 October 2026, 23 days out, was priced at 4.6% of spot. For 16 October 2026, implied volatility was 24.4% at the put 5% below spot and 21.8% at the call 5% above, +2.6 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $300.00 | 4,285 |
| Puts | $260.00 | 1,996 |
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 $300.00 | 3,942 | +2,307 |
| 16 October 2026 call at $290.00 | 2,309 | +1,587 |
| 16 October 2026 call at $270.00 | 469 | +364 |
| 16 October 2026 put at $260.00 | 1,900 | +338 |
Contracts whose open interest rose by 250 or more against the previous day's snapshot.
Source
CBOE delayed quotes for ECL, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
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