In the wake of Nvidia's 3rd quarter results, Russ Mould of A J Bell says that all capital expenditure booms come to an end because of over-investment. It is too soon to say how this one will turn out. He is intrigued, though, that AI tech needs energy and mined metals and yet capex in those sectors is very low. With AI, we need to see some return on the money invested. If it turns out to be the productivity boom we've been looking for, then people's perceptions towards mining and energy should change, although in both those fields it takes some time for capex to bear fruit.

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