
There’s an elegant simplicity to one of the central tenets in gauging the health of the stock market and the companies that comprise its benchmark indexes: figuring out what’s in the till at the end of the day. Profit remains the most important measure of stock market health—and Corporate America is raking it in. “The greatest force behind stock markets right now is earnings, which is helping to overshadow concerns about Iran, inflation and AI [capital expenditure] spending viability,” said Dennis Follmer, chief investment officer, at Montis Financial in Waltham, Mass., to Barron’s. “Earnings have been an absolute freight train driving this market higher.”