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Rio TintoCHIX:RIOL -0.65%76 10-Year Share Buyback Ratio is 1.10 as of Jun. 2026. GuruFocus rates CHIX:RIOL with a GF Score™ of 76/100 and a GF Value™ of £56.24 (Significantly Overvalued). The stock has 8 warning signs investors should review. Among 1,587 Metals & Mining companies, Rio Tinto ranks better than 98.3% on this metric.
Shares Outstanding (EOP) are shares that have been authorized, issued, and purchased by investors and are held by them.
10-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past ten years. It is calculated as the annualized percentage change in shares outstanding from ten years ago to the current year. A positive ratio may indicate share buybacks over the period, while a zero or negative ratio may reflect no repurchases or potential share issuance. Rio Tinto's current 10-Year Share Buyback Ratio was 1.10%.
CHIX:RIOl's 10-Year Share Buyback Ratio is ranked better than 98.3% of 1587
companies
in the Metals & Mining industry
Industry Median: -18.1
vs CHIX:RIOl: 1.10
Rio Tinto (CHIX:RIOl) 10-Year Share Buyback Ratio Explanation
A negative number means the company might be issuing new shares. A positive number indicates that the company is buying back shares.
Be Aware
Investors usually like share buybacks. But as pointed by Warren Buffett, only if a company buys back shares at the prices below the stock's intrinsic value, it rewards remaining shareholders. If a company buys its overvalued stocks back, it destroys shareholder value.
Rio Tinto 10-Year Share Buyback Ratio Related Terms
Rio Tinto 10-Year Share Buyback Ratio Competitor Comparison
For the Other Industrial Metals & Mining subindustry, Rio Tinto's 10-Year Share Buyback Ratio, along with its competitors' market caps and 10-Year Share Buyback Ratio data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Rio Tinto 10-Year Share Buyback Ratio vs Metals & Mining Industry
For the Metals & Mining industry and Basic Materials sector, Rio Tinto's 10-Year Share Buyback Ratio distribution charts can be found below:
* The bar in red indicates where Rio Tinto's 10-Year Share Buyback Ratio falls into.
This is the annualized percentage change in shares outstanding from ten years ago to the current year. The annualized percentage change is calculated with least-square regression based on the eleven years of annual data on Shares Outstanding (EOP).
Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the average dividends per share growth rate.
What does a 10-Year Share Buyback Ratio of 1.10 mean?
Rio Tinto (CHIX:RIOL) has a 10-Year Share Buyback Ratio of 1.10 as of Jun. 2026. The 10-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past ten years. It is calculated as the annualized percentage change in shares outstanding from ten years ago to the current year. View historical data for Rio Tinto and its competitors. According to the industry distribution chart, Rio Tinto ranks #27 out of 1587 companies in the Metals & Mining industry, placing it in the top 1.7%.
Is Rio Tinto's 10-Year Share Buyback Ratio too high?
Rio Tinto's current 10-Year Share Buyback Ratio is 1.10. Based on the distribution chart, Rio Tinto ranks #27 out of 1587 companies in the Metals & Mining industry, which is in the top quartile — a strong position relative to peers. Overall, Rio Tinto has a GF Score™ of 76/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Rio Tinto's 10-Year Share Buyback Ratio compare to competitors?
According to the Metals & Mining industry distribution chart, Rio Tinto ranks #27 out of 1587 companies for 10-Year Share Buyback Ratio. This places Rio Tinto in the top 2% of its industry — outperforming the majority of peers. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good 10-Year Share Buyback Ratio for a Metals & Mining company?
A good 10-Year Share Buyback Ratio depends on the Metals & Mining industry context. However, 10-Year Share Buyback Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high 10-Year Share Buyback Ratio mean?
A high 10-Year Share Buyback Ratio can signal that a stock is expensive relative to its fundamentals. The 10-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past ten years. It is calculated as the annualized percentage change in shares outstanding from ten years ago to the current year. View historical data for Rio Tinto and its competitors. Rio Tinto's current 10-Year Share Buyback Ratio is 1.10. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Rio Tinto stock overvalued right now?
Based on GuruFocus' analysis, Rio Tinto (CHIX:RIOL) is currently considered Significantly Overvalued. The stock's GF Value™ is £56.24, compared to a current price of £76.62 — trading 36.2% above its estimated fair value. The current 10-Year Share Buyback Ratio is 1.10. Rio Tinto's overall GF Score™ is 76/100 with 8 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is 10-Year Share Buyback Ratio calculated?
10-Year Share Buyback Ratio is calculated from a company's financial statements. For Rio Tinto (CHIX:RIOL), the current 10-Year Share Buyback Ratio is 1.10 as of Jun. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Rio Tinto (CHIX:RIOL) Overvalued in 2026?
Based on GuruFocus' analysis, Rio Tinto stock appears to be overvalued.
The current stock price of £76.62 is trading 36.2% above its estimated GF Value™ of £56.24.
GuruFocus considers Rio Tinto to be Significantly Overvalued.
Key valuation signals for CHIX:RIOL:
10-Year Share Buyback Ratio: 1.10
GF Value™: £56.24 vs. price of £76.62 (36.2% above fair value)
No single metric tells the full story. See the CHIX:RIOL stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Rio Tinto is a global diversified miner. Iron ore is its major commodity, with lesser contributions from copper and aluminum. Lithium, diamonds, gold, and industrial minerals are more minor contributors. The 1995 merger of RTZ and CRA, via a dual-listed structure, created the present-day company. The two operate as a single business entity, with shareholders in each company having equivalent economic and voting rights. Major assets included the Pilbara iron ore operations, a 30% stake in the Escondida copper mine, 66%-ownership of the Oyu Tolgoi copper mine in Mongolia, the Weipa and Gove bauxite mines in Australia, and six hydro-powered aluminum smelters in Canada.
76GF Score
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10-Year Share Buyback Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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