Rio Tinto plc options tape
Read from CBOE's delayed chain on 26 September 2026, with Rio Tinto plc at $94.56: open interest within 90 days was 28,177 call and 19,624 put contracts, a put/call ratio of 0.7; the day's volume was 680 calls and 622 puts (0.91). The most call open interest sits at the $110.00 strike (4,434 contracts) and the most put open interest at $87.50 (4,739). The at-the-money straddle for 16 October 2026, 20 days out, was priced at 5.5% of spot. For 16 October 2026, implied volatility was 30.3% at the put 5% below spot and 27.9% at the call 5% above, +2.4 points.
Where the open interest sits
| Side | Strike | Open interest |
|---|---|---|
| Calls | $110.00 | 4,434 |
| Puts | $87.50 | 4,739 |
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 RIO, the free 15-minute-delayed chain, read once a day. Figures describe positioning; they are not a forecast.
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