Why July was a great month to own the big three ASX 200 mining shares

The S&P/ASX 200 Index (ASX: XJO) gained a healthy 2.4% in July, with all three of the big ASX 200 mining shares outperforming the benchmark index over the month just past.

Trailing the pack was Rio Tinto Ltd (ASX: RIO). Rio Tinto shares gained 4.3% in July.

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