Rio Tinto Plc (RIO)
RIO moved a median of 0.00% 30 minutes after news, and +0.03% by the close. How RIO actually reacts to news — the realized, point-in-time move the market made, measured across 1,246 labeled events over the last three years with zero look-ahead.
RIO’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.01% | 43% | 1,218 |
| 30-min | 0.00% | 49% | 1,244 |
| 60-min | +0.01% | 50% | 1,244 |
| to close | +0.03% | 52% | 1,244 |
| Middle 50% of RIO reactions | -0.14% to +0.15% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 1,246 |
Half of all Rio Tinto Plc news events land between -0.14% and +0.15% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How RIO reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 36 | +0.06% | 53% | +0.41% |
| Analyst downgrades | 43 | +0.03% | 54% | +0.13% |
| Rating reiterations | 24 | +0.03% | 54% | +0.21% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The same measurement runs across every name in the dataset. 3 further classes were observed with fewer than 10 measured events and are not published. See how RIO ranks against every other measured name →
That’s how RIO usually reacts — get an email when it moves on news →Email me when RIO moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to RIO's baseline. Nothing else.
Recent RIO events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Rio Tinto releases third quarter 2026 production results | Press release | Business Wire | -0.08% | -0.73% | |
| Rio Tinto, Tasmanian Government and Commonwealth Government secure the future of Bell Bay Aluminium until 2031 | Press release | Business Wire | -0.01% | +0.13% | |
| Colours of our Country returns for its 21st year | Press release | Business Wire | -0.49% | -1.33% | |
| Nyangumarta Warrarn Aboriginal Corporation and Rio Tinto sign milestone agreement for Winu Project | Press release | Business Wire | -0.16% | -0.37% | |
| Ngarlawangga Aboriginal Corporation and Rio Tinto sign Interim Modernised Agreement | Press release | Business Wire | -0.10% | -1.28% | |
| Form 6-K RIO TINTO PLC For: Aug 31 | SEC filing · Form 6-K | SEC EDGAR | +0.08% | -0.58% | |
| Form SD RIO TINTO PLC | SEC filing · Form SD | SEC EDGAR | -0.11% | -0.65% | |
| Rio Tinto celebrates 60 years in Western Australia | Press release | Business Wire | -0.02% | -0.30% | |
| Rio Tinto welcomes agreement to secure long-term future of Tomago Aluminium | Press release | Business Wire | -0.30% | -1.36% | |
| Rio Tinto: Step-change in performance delivering higher shareholder returns | Press release | Business Wire | -0.59% | +0.19% | |
| Rio Tinto and WA Government sign agreements with Yindjibarndi WaterCo for proposed sale of Dampier Seawater Desalination Plant | Press release | Business Wire | +0.25% | +0.73% | |
| Rio Tinto releases second quarter 2026 production results | Press release | Business Wire | +0.03% | -0.12% | |
| Rio Tinto Canada Fund boosts community investment to C$13 million to better meet the needs of Canadians | Press release | Business Wire | +0.03% | -0.05% | |
| Rio Tinto commissions $1.5 billion AP60 smelter expansion in Quebec | Press release | Business Wire | -0.07% | -1.62% | |
| Town of Superior Approves Historic Water Agreement with Resolution Copper | Press release | PR Newswire | +0.02% | -0.55% | |
| Rio Tinto ships 8 billionth tonne of iron ore from the Pilbara | Press release | Business Wire | +0.10% | +1.56% | |
| Rio Tinto appoints new Chief Legal Officer | Press release | Business Wire | -0.98% | -1.36% | |
| Yindjibarndi Energy Corporation reaches Financial Close on Jinbi Solar Project; signs Power Purchase Agreement with Rio Tinto | Press release | Business Wire | +0.79% | +1.00% | |
| Form F-3ASR RIO TINTO PLC | SEC filing · Form F-3ASR | SEC EDGAR | +0.01% | -0.90% | |
| Rio Tinto’s A$100m boost for essential service worker housing in the Pilbara | Press release | Business Wire | -0.53% | -0.94% | |
| Rio Tinto donates A$1.5m to WA Department of Fire and Emergency Services to help with Severe Tropical Cyclone Narelle recovery | Press release | Business Wire | +0.33% | -1.21% | |
| Rio Tinto donates A$1.5 million to support Qld and NT communities impacted by Severe Tropical Cyclone Narelle and recent widespread flooding | Press release | Business Wire | -0.18% | -1.96% | |
| Rio Tinto releases first quarter 2026 production results | Press release | Business Wire | -0.18% | -1.96% | |
| Form SD RIO TINTO PLC | SEC filing · Form SD | SEC EDGAR | -0.12% | -0.18% | |
| Rio Tinto provides Iron Ore update following Tropical Cyclone Narelle | Press release | Business Wire | -0.35% | -1.56% | |
| Rio Tinto boosts 2025 Australian supplier spend to record A$19.7 billion | Press release | Business Wire | -0.04% | +1.40% | |
| Rio Tinto releases details of $9.9 billion of taxes and royalties paid in 2025 | Press release | Business Wire | +0.04% | +0.17% | |
| Rio Tinto’s Diavik diamond mine delivers its final production | Press release | Business Wire | +0.04% | +0.17% | |
| Rio Tinto, Queensland and Commonwealth secure long-term future for Boyne aluminium smelter at Gladstone | Press release | Business Wire | -0.35% | -0.39% | |
| Resolution Copper completes historic land exchange | Press release | Business Wire | -0.41% | -1.10% | |
| United States Forest Service and Resolution Copper Complete Land Exchange | Press release | PR Newswire | -0.41% | -1.10% | |
| Fatal incident at Rio Tinto Kennecott | Press release | Business Wire | -0.29% | -2.48% | |
| Rio Tinto and Prysmian partner to deliver innovative low-carbon aluminium solutions for the data centre market | Press release | Business Wire | +0.21% | -1.04% | |
| Rio Tinto secures $1.175 billion financing package for Rincon lithium project in Argentina | Press release | Business Wire | -0.03% | -0.43% | |
| Rio Tinto and WA Government partner to expand Dampier Seawater Desalination Plant | Press release | Business Wire | -0.09% | -0.37% | |
| Rio Tinto advances gallium metal R&D project in partnership with the Government of Canada | Press release | Business Wire | +0.14% | +1.45% | |
| Form IRANNOTICE RIO TINTO PLC | SEC filing · Form IRANNOTICE | SEC EDGAR | +0.35% | +1.42% | |
| Rio Tinto: Solid results underpinned by +8% CuEq production and sharper cost discipline | Press release | Business Wire | -0.54% | +1.46% | |
| Fatal incident at Simandou project | Press release | Business Wire | +0.31% | +2.11% | |
| Rio Tinto executive team change | Press release | Business Wire | +0.20% | -2.09% | |
| Resolution Copper Donates $285,000 to United Food Bank | Press release | PR Newswire | +0.44% | +2.22% | |
| No intention to bid statement | Press release | Business Wire | +0.68% | -1.60% | |
| Rio Tinto strengthens its global low-carbon aluminium footprint through joint acquisition with Chalco of Votorantim's interest in CBA | Press release | Business Wire | +0.63% | -1.61% | |
| Rio Tinto expands solar power capacity at Kennecott | Press release | Business Wire | -0.22% | +0.81% | |
| Rio Tinto releases fourth quarter 2025 production results | Press release | Business Wire | +0.16% | -0.74% | |
| Rio Tinto and Amazon Web Services collaborate to bring low-carbon Nuton copper to U.S. data centres | Press release | Business Wire | +0.09% | +0.51% | |
| Rio Tinto and BHP explore collaboration to mine up to 200 million tonnes of Pilbara iron ore | Press release | Business Wire | +0.09% | +0.51% | |
| Statement regarding Glencore plc (“Glencore”) | Press release | Business Wire | -0.39% | -0.32% | |
| AI Is Transforming Mining as Global AI In Mining Market Projected to Reach $685 Billion By 2033 | Press release | GlobeNewswire | +0.09% | +0.43% | |
| Rhodes Ridge Joint Venture partners begin $191 million feasibility study on up to 50Mtpa Pilbara iron ore mine | Press release | Business Wire | +0.31% | -0.51% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the RIO section they belong to.
Where else RIO is measured.
RIO earnings → · Analyst actions → · SEC filings →
Other Basic Materials names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Univar Solutions Inc. (UNVR) | 1,277 | 0.00% | 48% |
| Peabody Energy Corporation (BTU) | 1,269 | -0.04% | 48% |
| Scotts Miracle-Gro Company (The) (SMG) | 1,227 | -0.02% | 48% |
| SSR Mining Inc. (SSRM) | 1,210 | +0.10% | 53% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
All Basic Materials names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Rio Tinto Plc's median reaction calculated?
Every labeled RIO news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 1,246 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 49% of RIO's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does RIO's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.