Stocks fluctuate on mixed earnings and economic data

The Dow closed slightly higher, ending a four-week losing streak, as mixed quarterly earnings reports from companies weighed on investor sentiment. Freeport-McMoran Copper & Gold reported better-than-expected earnings but warned of ongoing labor shortages, causing its shares to drop. HCA Holdings Inc jumped more than 4% after upgrading its annual guidance. Tech stocks stuttered ahead of big tech's quarterly earnings next week, while Amazon rose more than 3% after announcing plans to restructure its Whole Foods business. Energy stocks were soured by Schlumberger NV's weaker margins and cashflow. Economic indicators showed a return to expansion.