Marathon Petroleum Corp. options tape
Read from CBOE's delayed chain on 23 September 2026, with Marathon Petroleum Corp. at $389.68: open interest within 90 days was 18,218 call and 27,478 put contracts, a put/call ratio of 1.51; the day's volume was 1,614 calls and 4,810 puts (2.98). The most call open interest sits at the $440.00 strike (1,168 contracts) and the most put open interest at $340.00 (3,465). The at-the-money straddle for 16 October 2026, 23 days out, was priced at 10.0% of spot. For 16 October 2026, implied volatility was 50.7% at the put 5% below spot and 49.9% at the call 5% above, +0.7 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $440.00 | 1,168 |
| Puts | $340.00 | 3,465 |
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 |
|---|---|---|
| 18 December 2026 put at $400.00 | 660 | +516 |
| 16 October 2026 put at $410.00 | 668 | +411 |
Contracts whose open interest rose by 250 or more against the previous day's snapshot.
Source
CBOE delayed quotes for MPC, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
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