By STAN CHOE, Associated Press Business Writer NEW YORK (AP) — U.S. stocks are drifting higher Friday as Wall Street heads toward the end of an unusually quiet week. The S&P 500 was up 0.4% in early trading and on track to erase what had been a small loss for the week. This may be the first week in seven where the index at the heart of many 401(k) accounts moves by less than 1.5%, after getting rocked first by fears about President Donald Trump’…