"Stocks Surge as Nvidia Leads Market to Record Highs"

US stocks opened higher, with the S&P 500 crossing 5,100 for the first time, driven by Nvidia's blowout earnings and the possibility of a US interest rate cut. Warner Bros Discovery's stock sank after reporting lower fourth-quarter revenue, while Walmart prepared for a 3-for-1 stock split. Reddit's IPO filing revealed its reliance on ad revenue and losses, raising questions about investor reception.