BlackRock, Inc. options tape
Read from CBOE's delayed chain on 23 September 2026, with BlackRock, Inc. at $1,090.27: open interest within 90 days was 10,343 call and 6,526 put contracts, a put/call ratio of 0.63; the day's volume was 1,605 calls and 322 puts (0.2). The most call open interest sits at the $1,300.00 strike (2,160 contracts) and the most put open interest at $1,000.00 (552). The at-the-money straddle for 25 September 2026, 2 days out, was priced at 2.5% of spot. For 16 October 2026, implied volatility was 31.8% at the put 5% below spot and 29.4% at the call 5% above, +2.4 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $1,300.00 | 2,160 |
| Puts | $1,000.00 | 552 |
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 $1,080.00 | 741 | +447 |
Contracts whose open interest rose by 250 or more against the previous day's snapshot.
Source
CBOE delayed quotes for BLK, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
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