Rio Tinto’s Copper and Aluminium Shift Crystallizes, Undervaluation Persists

What happened

Rio Tinto's 2026 first-half results showed a 75% jump in free cash flow to $3.8 billion and a 43% rise in underlying earnings to $6.9 billion, driven by surging copper and aluminium profitability. Copper EBITDA climbed 84% and aluminium EBITDA rose 38%, together contributing 57% of total EBITDA, a clear pivot away from the historically dominant iron ore division. The company funded a $3.4 billion dividend from operations, easing earlier concerns about cash coverage and rising net debt. Despite a significant share price rally, the stock still trades at a forward P/E of 11, a 27% discount to the sector, suggesting the market is not fully pricing in the improved earnings mix. However, the iron ore cash engine remains critical, and a further rise in Chinese steel demand uncertainty or execution hiccups at Oyu Tolgoi could temper the re-rating.

Implication

The strong free cash flow generation and pivot toward higher-multiple copper and aluminium earnings reduce the risk of dividend cuts and ease balance sheet pressure. With the stock still trading at a meaningful discount to peers, the risk/reward appears favorable, though investors should monitor iron ore price developments and project execution. Sustained momentum in copper and aluminium could drive a re-rating over the next 12 months, but the current valuation already reflects much of the good news, limiting upside without further operational upgrades.

Thesis delta

Rio Tinto’s H1 2026 results materially shift the investment case: copper and aluminium now dominate EBITDA, demonstrating a successful pivot away from iron ore reliance. Strong free cash flow and a discounted valuation (P/E of 11) upgrade the outlook from a wait-and-see stance to a buy for those comfortable with moderate iron ore exposure. The key risk remains China demand, but the improving earnings quality and cash returns justify a more bullish stance.