Western Digital Corp. options tape
Read from CBOE's delayed chain on 23 September 2026, with Western Digital Corp. at $464.90: open interest within 90 days was 78,482 call and 91,187 put contracts, a put/call ratio of 1.16; the day's volume was 19,134 calls and 11,806 puts (0.62). The most call open interest sits at the $500.00 strike (3,644 contracts) and the most put open interest at $420.00 (4,338). The at-the-money straddle for 25 September 2026, 2 days out, was priced at 5.9% of spot. For 16 October 2026, implied volatility was 70.8% at the put 5% below spot and 71.2% at the call 5% above, -0.5 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $500.00 | 3,644 |
| Puts | $420.00 | 4,338 |
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 call at $460.00 | 310 | 128 | $1.3 million |
| 2 October 2026 call at $460.00 | 395 | 103 | $985,525 |
| 2 October 2026 call at $450.00 | 254 | 98 | $772,795 |
| 16 October 2026 put at $442.50 | 235 | 7 | $527,575 |
| 30 October 2026 call at $520.00 | 206 | 8 | $506,760 |
| 25 September 2026 call at $500.00 | 1,483 | 641 | $504,220 |
| 25 September 2026 call at $457.50 | 271 | 79 | $470,862 |
| 25 September 2026 call at $462.50 | 212 | 54 | $314,290 |
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 $530.00 | 863 | +718 |
| 25 September 2026 call at $470.00 | 620 | +373 |
| 25 September 2026 put at $400.00 | 872 | +256 |
Contracts whose open interest rose by 250 or more against the previous day's snapshot.
Source
CBOE delayed quotes for WDC, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
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