Banco Santander, S.A. options tape
Read from CBOE's delayed chain on 26 September 2026, with Banco Santander, S.A. at $14.42: open interest within 90 days was 19,715 call and 8,477 put contracts, a put/call ratio of 0.43; the day's volume was 145 calls and 52 puts (0.36). The most call open interest sits at the $15.00 strike (4,833 contracts) and the most put open interest at $13.00 (5,524). The at-the-money straddle for 16 October 2026, 20 days out, was priced at 7.1% of spot. For 16 October 2026, implied volatility was 34.4% at the put 5% below spot and 27.4% at the call 5% above, +7.0 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $15.00 | 4,833 |
| Puts | $13.00 | 5,524 |
The strike with the most open interest on each side, across expiries within 90 days.
Open-interest builds against the previous day appear from the second daily read of this name.
Source
CBOE delayed quotes for SAN, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
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