Another wobbly day of trading on Wall Street ended with more gains for stocks Wednesday, as the latest batch of company earnings reports kept investors in a buying mood. The S&P 500 rose 0.9 percent after having briefly dipped into the red in the early going. The Dow Jones Industrial Average rose 0.6 percent and the Nasdaq added 0.5 percent. The latest gains have the indexes on pace for solid gains this week. Traders bid up shares in several companies that reported solid quarterly results, which helped lift the broader market. Google parent Alphabet jumped 7.5 percent for the biggest gain in the S&P 500 after it said its digital ad business propelled a 36 percent jump in profit last quarter. Chipmaker Advanced Micro Devices rose 5.1 percent after it reported surprisingly strong fourth-quarter financial results and gave investors an encouraging sales forecast. About three-fourths of the companies in the benchmark S&P …