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Investors’ jitters over growth in China and other emerging markets faded and US stocks rose for the first time in four days. Earnings gains from big companies including Pfizer and Comcast helped lift indexes. One disappointment, though, was Apple, whose weak revenue forecast pushed it to the biggest one-day loss in a year. Nine of the 10 sectors that make up the S&P 500 rose. Health care and financials were the two best-performers. Tech shares fell. Investors will turn their focus Wednesday toward the Fed as most analysts expect the bank to further reduce its bond purchases by $10 billion to $65 billion following a two-day meeting that began Tuesday.