Pfizer Inc. options tape
Read from CBOE's delayed chain on 23 September 2026, with Pfizer Inc. at $27.90: open interest within 90 days was 466,148 call and 274,181 put contracts, a put/call ratio of 0.59; the day's volume was 61,253 calls and 9,568 puts (0.16). The most call open interest sits at the $30.00 strike (67,506 contracts) and the most put open interest at $25.00 (73,636). The at-the-money straddle for 25 September 2026, 2 days out, was priced at 1.6% of spot. For 16 October 2026, implied volatility was 22.7% at the put 5% below spot and 21.1% at the call 5% above, +1.7 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $30.00 | 67,506 |
| Puts | $25.00 | 73,636 |
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 |
|---|---|---|---|
| 16 October 2026 call at $27.50 | 7,117 | 163 | $654,764 |
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 |
|---|---|---|
| 20 November 2026 put at $25.00 | 24,502 | +19,040 |
| 16 October 2026 put at $25.00 | 10,845 | +4,616 |
| 25 September 2026 call at $28.00 | 6,950 | +2,573 |
| 16 October 2026 call at $28.50 | 2,288 | +2,288 |
| 25 September 2026 call at $28.50 | 11,352 | +1,555 |
| 16 October 2026 call at $29.00 | 26,712 | +1,250 |
| 9 October 2026 call at $28.50 | 2,006 | +1,206 |
| 16 October 2026 put at $27.00 | 12,405 | +1,099 |
Contracts whose open interest rose by 250 or more against the previous day's snapshot.
Source
CBOE delayed quotes for PFE, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
The same record on your computer
GreekSoup is also a free program for your own computer. It reads these same filings for the names you follow, refreshed as they land, with no account. One pasted line installs it.