West Pharmaceutical Services Inc. options tape
Read from CBOE's delayed chain on 23 September 2026, with West Pharmaceutical Services Inc. at $361.78: open interest within 90 days was 1,310 call and 1,330 put contracts, a put/call ratio of 1.02; the day's volume was 57 calls and 7 puts (0.12). The most call open interest sits at the $360.00 strike (307 contracts) and the most put open interest at $270.00 (514). The at-the-money straddle for 16 October 2026, 23 days out, was priced at 5.2% of spot. For 16 October 2026, implied volatility was 25.7% at the put 5% below spot and 23.8% at the call 5% above, +1.9 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $360.00 | 307 |
| Puts | $270.00 | 514 |
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 $360.00 | 301 | +263 |
Contracts whose open interest rose by 250 or more against the previous day's snapshot.
Source
CBOE delayed quotes for WST, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
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