US stocks have delivered modest gains over the past six months, even as investors have grown increasingly concerned about technology valuations, interest rates and the returns from artificial intelligence spending. Amid the uncertainty, at least 10 large-cap American stocks are trading at discounts of nearly 47% to 63% to their respective sector valuations, according to data from Vested Finance.The S&P 500, a benchmark of America's largest listed companies, has gained about 4.3% over the past six months.