Buying ASX 200 mining shares? Here’s how Rio Tinto, Fortescue and BHP stacked up in April

The S&P/ASX 200 Index (ASX: XJO) gained 2.2% in April, with two of the big three ASX 200 mining shares outperforming those gains and one ending the month in the red.

Turning to the two out-performers first, from market close on 31 March through to the closing bell on 30 April, Rio Tinto Ltd (