Central bankers and oil prices stand between stock traders and the weekend.
Both could be factors for markets Friday, with European Central Bank President Mario Draghi speaking ahead of the open. Then St. Louis Fed President James Bullard and New York Fed President William Dudley speak on the economy during trading hours.
The price of oil could again be a magnet for stocks, as the December futures contract rolls off the board, and January becomes the front-month contract at the Nymex at the end of the session. The January contract settled down at $41.72 per barrel Thursday, while the December contract fell 21 cents at $40.54 per barrel.