Edison International options tape
Read from CBOE's delayed chain on 23 September 2026, with Edison International at $55.42: open interest within 90 days was 28,440 call and 34,354 put contracts, a put/call ratio of 1.21; the day's volume was 2,018 calls and 430 puts (0.21). The most call open interest sits at the $55.00 strike (5,980 contracts) and the most put open interest at $65.00 (8,416). The at-the-money straddle for 16 October 2026, 23 days out, was priced at 6.6% of spot. For 16 October 2026, implied volatility was 31.6% at the put 5% below spot and 32.6% at the call 5% above, -1.0 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $55.00 | 5,980 |
| Puts | $65.00 | 8,416 |
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 |
|---|---|---|---|
| 20 November 2026 call at $57.50 | 872 | 82 | $187,480 |
| 20 November 2026 call at $62.50 | 570 | 80 | $55,575 |
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 |
|---|---|---|
| 16 October 2026 call at $57.50 | 1,230 | +385 |
| 16 October 2026 put at $55.00 | 6,280 | +359 |
| 16 October 2026 call at $55.00 | 5,950 | +287 |
Contracts whose open interest rose by 250 or more against the previous day's snapshot.
Source
CBOE delayed quotes for EIX, 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.