Costco Wholesale Corp. options tape
Read from CBOE's delayed chain on 23 September 2026, with Costco Wholesale Corp. at $899.72: open interest within 90 days was 74,129 call and 85,484 put contracts, a put/call ratio of 1.15; the day's volume was 12,916 calls and 12,402 puts (0.96). The most call open interest sits at the $1,000.00 strike (4,890 contracts) and the most put open interest at $900.00 (4,562). The at-the-money straddle for 25 September 2026, 2 days out, was priced at 3.1% of spot. For 16 October 2026, implied volatility was 24.0% at the put 5% below spot and 24.1% at the call 5% above, -0.2 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $1,000.00 | 4,890 |
| Puts | $900.00 | 4,562 |
The strike with the most open interest on each side, across expiries within 90 days.
Strikes where the day's volume was at least twice the open interest
| Contract | Volume | Open interest before | Premium traded |
|---|---|---|---|
| 23 October 2026 put at $905.00 | 212 | 51 | $543,780 |
| 2 October 2026 put at $905.00 | 263 | 117 | $533,890 |
Volume of at least 200 contracts and at least twice the open interest, with at least $25,000 of premium at the mid; contracts expiring the same day are left out. Premium is mid price times volume times 100.
Open interest built since 22 September 2026
| Contract | Open interest now | Change |
|---|---|---|
| 25 September 2026 call at $945.00 | 1,219 | +885 |
Contracts whose open interest rose by 250 or more against the previous day's snapshot.
Source
CBOE delayed quotes for COST, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
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