By Benjamin Pimentel, MarketWatch SAN FRANCISCO (MarketWatch) — Technology stocks were mostly lower Thursday, weighed down by declining shares of Rackspace Hosting Inc. and Microsoft Corp. even as the group got a lift from rising Groupon Inc.

Bloomberg BlackBerry’s new Z10 smartphone SAN FRANCISCO (MarketWatch) — Tech stocks were mostly higher Friday, propelled by gains in the chip sector as Micron Technology rose sharply after posting better-than-expected results. A late-day turn came from BlackBerry (US:BBRY) which saw its shares tumble nearly 8% closing at $14.91 following an earlier gain. The company rolled out its new Z10 handset in the U.S.

IBM’s fourth-quarter earnings grew 6 percent even as revenue was largely flat, as the company benefited from growing, lucrative software businesses such as Internet-based computing and data analytics. The results beat Wall Street’s expectations, as did the technology bellwether’s guidance for the current year. IBM’s stock increased in after-hours trading following the release of results.