U.S. stocks closed down on Friday after a volatile session as investors worried at the end of a rough month for the market about weak U.S. growth data and whether instability in Europe could hurt corporate earnings in the United States.

U.S. tech giant Amazon is in talks to buy Israeli chipmaker Annapurna Labs for up to $370 million, financial newspaper Calcalist reported on Thursday.

Amazon Civil War show "Point of Honor" offers little focus on slavery, "woody" dialogue, and poorly written characters, according to reviews. Only "The Man in the High Castle" is said to be worth watching from Amazon 2015 pilots.

European antitrust regulators believed Amazon's (AMZN.O) arrangement with Luxembourg to minimise its tax bill did constitute state aid and expressed doubt that such aid was lawful, according to a document released on Friday.

Amazon prides itself on being a company that breaks the rules, but its recent success in Hollywood also reflects an embrace of a more traditional, old-fashioned script.

For top U.S. retailers, free delivery is now the norm. That is good news for shoppers, but not so much for investors. During the just-ended holiday season, outlets from Target to Wal-Mart to Amazon

Amazon.com Inc said on Friday it drew more than 10 million new members to its Prime shipping and digital content service over the holidays and intends to offer one-hour shipping to more cities in 2015.

This spring, Taser International Inc won a small but high-profile contract to supply body cameras to the London police. But the deal nearly collapsed over one issue: where the video footage would be stored.

Flipkart, India's largest online retailer, on Saturday said it had raised funding worth $700 million, as it tries to compete with Amazon, which is rapidly scaling up operations in the country.

Amazon.com Inc added a new feature to its website on Tuesday that allows customers to bid for lower prices on more than 150,000 items, including fine art and rare coins, sold by third-party vendors.