Nvidia reports fourth-quarter fiscal-2024 earnings. This is perhaps the most consequential earnings release for the stock market so far this year, as much of the gains in the S&P 500 over the past year have been powered by artificial-intelligence hype and hope. Shares of Nvidia, the poster child of the AI boom, have already rallied 47% this year after jumping 239% in 2023. Consensus estimates are for Nvidia to earn $4.59 a share on $20.4 billion in revenue for the quarter.