Major averages never found their footing Monday, ending near session lows after a sluggish open. Selling picked up the pace after 12 p.m. ET. At the close, the Nasdaq lost 0.8%, the S&P 500 gave up 0.7%, and the Dow Jones industrial average fell 0.6%. Weak economic data out of China were partly to blame. Imports shrank unexpectedly in November while exports slowed. On Nov.