Wall Street stocks have followed their European counterparts closing lower, extending a selloff prompted in part by the run-up to Nvidia earnings, which could test the artificial intelligence boom amid mounting valuation concerns.

All three major US stock indexes pared losses by early Tuesday afternoon but remained in negative territory, with crude, bitcoin and gold advancing and US Treasury yields dipping as investor risk appetite soured.

The S&P 500 was on track for its fourth straight daily loss, which has brought the bellwether index down about 2.8 per cent since November 12.

Chipmaker Nvidia's quarterly results, expected on Wednesday, will be scrutinised for signs that the AI juggernaut, which has provided the muscle for much of the stock market's recent rally, has staying power or

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