By Rex Crum, MarketWatch

SAN FRANCISCO (MarketWatch) -- Tech stocks claimed the high ground Tuesday as Sprint Corp. and CommVault Systems Inc. shares rose following quarterly results.

Sprint (S), the No. 3. mobile-phone carrier in the U.S., rose 3%, to $5.92 a share, after the company reported a quarterly loss that grew from the year-ago period due to costs associated with closing down its Nextel network. Sprint, which also sold almost 80% of its shares to Japan's Softbank Corp., said it lost more customers in the quarter than several analysts had forecast.

CommVault (CVLT) posted one of the tech sector's strongest gains, as its shares rose more than 10% to $85.56. Before the market opened, the enterprise data storage provider reported a quarterly profit of 40 cents a share, on $134.4 million in revenue, to top the estimates of Wall Street analysts, who forecast CommVault to earn 35 cents a share on sales of $132.2 million.

Facebook Inc. (FB) continued its gains in the wake of last week's earnings results, as its shares rose 3% to $36.45. Among other social-networking and Internet stocks, advances also came from Groupon Inc. (GRPN), eBay Inc. (EBAY), Yahoo Inc. (YHOO) and LinkedIn Corp. (LNKD). See commentary: Facebook continues to disappoint.

Harris Corp. (HRS) climbed almost 7% to $56.44 a share after the communications-equipment maker reported better-than-expected quarterly results prior to the start of trading.

The Nasdaq Composite Index (RIXF) rose 23 points to 3,622, while the Philadelphia Semiconductor Index (SOX) rose 1% and the Morgan Stanley High Tech 35 Index (MSH) also advanced.

Declines came from PMC-Sierra Inc. (PMCS), which fell 7.5% to $6.48 a share. After Monday's market close, the chipmaker reported a second-quarter loss that grew from the year-ago quarter and its sales fell below Wall Street analysts' forecasts.

Corning Inc. (GLW) shares gave up 4%, to trade at $14.75. Before the market opened, Corning reported a 35% increase in second-quarter earnings as it said it benefited from increased sales of its Gorilla Glass for smartphones.

Sandisk Corp. (SNDK) was off by 2.5%, at $54.01. Goldman Sachs analyst James Schneider cut his rating on the flash memory chipmaker to neutral, saying that "greater NAND supply may be added in the next few quarters than we previously assumed, which could drive meaningful near-term price declines."

Symantec Corp. (SYMC) was up by 1%, and Carbonite Inc. (CARB) edged up by a penny a share, while Take-Two Interactive Software Inc. (TTWO) shed 3 cents a share to $16.94. All three companies are scheduled to report quarterly results after the close of trading.

 
 

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