By Rex Crum, MarketWatch

SAN FRANCISCO (MarketWatch) -- Gains from Apple Inc. and Groupon Inc. stood out Friday, but losses still weighed as the tech sector retreated along with the broader market following the latest figures on the U.S. inflation levels.

Apple (AAPL) rose 2.3%, to $442.403 even though its top rival Samsung made a splash late Thursday with the unveiling of its Galaxy S4 smartphone. Several analysts that cover Apple remained upbeat about the company's mobile-phone prospects even with the launch of the Galaxy S4. See: Apple shares up despite Galaxy S4 threat.

Groupon Inc. (GRPN) shares also performed well, rising 7%, to $5.43. The online daily deal company received a positive endorsement from noted Legg Mason investor Bill Miller, who while on the CNBC cable channel said he liked Groupon's stock "a lot" and noted the company has $1.2 billion in cash and no debt.

But Apple and Groupon were among the day's outliers, as investors reacted negatively to the Labor Department saying consumer prices in February rose 0.7%, the highest gain since June 2009. A surprise spike in gasoline prices was among the main reasons for the overall price increase. See: Inflation highest in more than three years.

The Nasdaq Composite Index (RIXF) trimmed its losses, but was still down by 9 points at 3,249, while the Philadelphia Semiconductor Index (SOX) gave up 1.7%.

One of the biggest percentage drops among tech stocks came from solid-state-drive maker Stec Inc. (STEC), which fell 12.5%, to $4.81 a share. On Thursday, Stec reported a wider quarterly loss and the company's top shareholder, Balch Hill LLC, called from for Stec co-founders Mark Moshayedi and Manouch Moshaeydi to resign from the company's board of directors. Balch Hill holds a 9% stake in Stec.

Online professional-services recommendation company Angie's List Inc. (ANGI) nearly reached its break-even point of $19.86 a share after earlier falling as much as 4%. Late Thursday, Angie's List said Chief Financial Officer Robert Millard would step down at the end of the quarter. Controller Charles Hundt will be interim CFO until a replacement for Millard is found.

Analyst Gene Munster of Piper Jaffray, who recently initiated coverage of Angie's List with an outperform rating and $25-a-share target price, said Millard's departure as CFO was "a surprise, given that there was nothing really negative of late" to come from the company. See: Angie's List gets high marks as shares rise.

Other losses came from AOL Inc. (AOL), which was down almost 4% at $35.14; Zynga Inc. (ZNGA), off by 3% at $3.58 a share, and eBay Inc. (EBAY), which gave up 2% to trade at $50.70.

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