Technology and energy companies helped pull stocks lower on Wall Street Monday, a downbeat start to the week following the market’s best weekly gain since February. The S&P 500 fell 0.9 percent, giving back some of its gains after the benchmark index climbed to an all-time high Friday. The Dow Jones Industrial Average fell 0.9 percent, while the tech-heavy Nasdaq composite slid 1.4 percent. Small-company stocks fared worse than the broader market in a signal that investors are concerned about economic growth. The Russell 2000 shed 1.4 percent. The market’s pullback, with the S&P 500 fresh off its 67th all-time high this year, comes as investors look ahead to the Federal Reserve’s latest economic and interest rate policy update on Wednesday. Markets expect the central bank will announce plans to accelerate its timetable for reducing bond purchases aimed at keeping long-term interest rates low. “What the Street is not sure …