Wall Street dips after manufacturing data; energy weak

The S&P 500 and the Dow dipped on Thursday after sluggish monthly factory activity data dented optimism about the economy and oil prices declined, as investors exercised caution ahead of a payrolls report on Friday. A report from the Institute of Supply Management showed U.S. factory activity contracted for the first time in six months in August as new orders and production tumbled, but data on the labor market pointed to a pickup in third quarter economic growth. Energy shares , down 0.9 pe