# RIO options activity and gamma

Canonical: https://squawkflow.com/ticker/RIO

Rio Tinto Plc Common Stock. Basic Materials. Catalogue checked 2026-10-20.

Last held price $83.41, as of 2026-10-23T20:00:00.000Z, delayed price.

As of 2026-10-23T20:00:00.000Z, RIO has 83,628 standard-contract open interest across 3 expiries, 1.91% from the dated underlying price to the call wall. OI rank 34 of 113 measured books with the same UTC source date; not a full-market ranking.

Source: delayed options data; quote 2026-10-23T20:00:00.000Z; chain 2026-10-23T20:00:00.000Z. OI-derived gamma estimate, calls positive and puts negative; 100-share standard roots only; dollars per 1% underlying move. Not observed dealer positions. Full-chain activity; at most 40 nearest gamma strikes.

Gamma by strike (40 rows, dollars per 1% move):

| Strike | Net gamma estimate |
| --- | --- |
| 155 | 0 |
| 150 | 0 |
| 145 | 0 |
| 140 | 0 |
| 135 | 0 |
| 130 | 0 |
| 125 | 0 |
| 120 | 36452 |
| 115 | 182246 |
| 110 | 212969 |
| 105 | 281604 |
| 100 | 227130 |
| 97.5 | 169901 |
| 95 | -28104 |
| 92.5 | -111554 |
| 90 | -1058433 |
| 87.5 | 5201 |
| 85 | -1535780 |
| 82.5 | -130694 |
| 80 | -1291630 |
| 77.5 | -175981 |
| 75 | -292959 |
| 72.5 | 0 |
| 70 | -138499 |
| 67.5 | -10296 |
| 65 | -594 |
| 62.5 | 0 |
| 60 | -2288 |
| 57.5 | 0 |
| 55 | -27552 |
| 52.5 | 0 |
| 50 | 0 |
| 47.5 | 0 |
| 45 | 0 |
| 42.5 | 0 |
| 40 | 0 |
| 37.5 | 0 |
| 35 | 0 |
| 32.5 | 0 |
| 30 | 0 |

Sector peers: [AEM](https://squawkflow.com/ticker/AEM), [AG](https://squawkflow.com/ticker/AG), [AGI](https://squawkflow.com/ticker/AGI), [ALM](https://squawkflow.com/ticker/ALM), [ALOY](https://squawkflow.com/ticker/ALOY), [APD](https://squawkflow.com/ticker/APD), [ASM](https://squawkflow.com/ticker/ASM), [AU](https://squawkflow.com/ticker/AU)

[Sector context](https://squawkflow.com/sector-rotation)