Shares of tech giants Meta and Microsoft were soaring Thursday, with the two companies adding a combined $400 billion to their market values

Microsoft hit $4 trillion in stock market value on Thursday, becoming the second publicly traded company after Nvidia to surpass that milestone following a blockbuster earnings report that showed its massive bets on AI are paying off.

And both Meta and Microsoft were already on track to spend more than 30% of this year’s revenue on capital expenditures, compared with about 15% to 20% historically. Those outlays were already beginning to look like mere table stakes after Google parent Alphabet used its report last week to bump up its own capex spending plans for this year to $85 billion.