Investors once again appeared wary of placing any big bets Friday.
Tech shares have been the biggest drivers this week, boosted by strong earnings from Apple(AAPL) and Facebook(FB), but weak results from Amazon(AMZN) and Zynga(ZNGA) could put pressure on the sector Friday.
Amazon shares were lower after the online retailer posted a surprise loss. And Zynga's stock was getting slammed in premarket trading after the online gaming company issued a weak outlook for the third quarter and said it's not going to pursue online gambling in the United States.
Starbucks(SBUX) shares rose after the coffee giant delivered better-than-expected quarterly earnings and sales.
Halliburton(HAL) stock rose nearly 4% after the Justice Department said the oilfield services firm would plead guilty to destroying computer test results that had been sought as evidence in the Deepwater Horizon disaster.