Nvidia is expected to be the biggest contributor to Q3 corporate profits. ‘The bar is very high,’ analyst says

Shares of chip maker Nvidia Corp. are up more than 240% this year, helped by this year’s AI boom and record quarterly results. The company, worth around $1.2 trillion now, is big enough that it is expected to be the largest driver of profit growth for the S&P 500 index SPX overall for the third quarter.

But to keep that rally going, Nvidia NVDA, which reports third-quarter results on Tuesday, will have to get past some already-lofty expectations.

“In…