MKS Inc. options tape
These figures are updated after the US market closes, every trading day. For the live chain, go to CBOE's own page for MKSI.
Updated after the US market close on 8 October 2026, with MKS Inc. at $260.38: open interest within 90 days was 9,863 call and 4,611 put contracts, a put/call ratio of 0.47; the day's volume was 66 calls and 178 puts (2.7). The most call open interest sits at the $340.00 strike (997 contracts) and the most put open interest at $220.00 (896). The at-the-money straddle for 16 October 2026, 7 days out, was priced at 6.7% of spot. For 20 November 2026, implied volatility was 58.1% at the put 5% below spot and 60.3% at the call 5% above, -2.1 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $340.00 | 997 |
| Puts | $220.00 | 896 |
The strike with the most open interest on each side, across expiries within 90 days.
Open-interest builds against the session before appear from the second update of this name.
Source
Official exchange quotes, updated after each US market close. Figures describe positioning; they are not a forecast.
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