Stocks faded in the last hour of trading and ended mostly lower Wednesday, a day after the S&P 500 and the Dow Jones Industrial Average set their latest record highs. Several big technology companies posted solid gains, led by Microsoft, which reported a 24% surge in profits last quarter as its cloud computing business bounded ahead. The S&P 500 gave up 0.5% after shedding an early gain and the Dow Jones Industrial Average lost 0.7%. The Nasdaq ended little changed. Encouraging earnings helped lift several companies, including McDonald’s. The yield on the 10-year Treasury fell to 1.53%. Oil prices fell.