By Rex Crum, MarketWatch

SAN FRANCISCO (MarketWatch) -- Tech stocks put in a strong performance Thursday, led by gains from EMC Corp. and Facebook Inc., and a big rise from Clearwire Corp. as Dish Network Corp. raised its bid for the wireless network operator.

EMC (EMC) shares climbed 5.4% to close at $24.93 after the company said it would begin paying a quarterly dividend of 10 cents a share. The first payment will be July 23 to shareholders of record as of July 1.

Additionally, EMC announced a big increase in its stock repurchase plan, going from $1 billion this year to $6 billion over the three-year period ending Dec. 31, 2015. EMC said that under this plan, it expects to repurchase $3.5 billion in stock by end of the second quarter of 2014.

Facebook (FB) also flexed its muscles, rising 5.3% to close at $24.55 a share. Before the market opened, BMO Capital Markets analyst Daniel Salmon raised his rating on Facebook to outperform, or the equivalent of buy, from market perform. Salmon also edged up his price target on Facebook's stock to $33 a share from $32.

In a research note, Salmon said that following checks with advertising and tech industry contacts, "sentiment around Facebook advertising remains quite positive, with emphasis on improved customer service in particular." Salmon also said Facebook's shares could see more gains from "the near-term catalyst of an upgraded video advertising offering."

Another big percentage gainer was wireless network operator Clearwire Corp. (CLWR), which saw its shares surge more than 29% to close at $4.50.

Before the market opened, Dish Network Corp. (DISH)raised its bid for Clearwire to $4.40 a share, which values the company at $6.9 billion. Dish had previously offered $3.30 a share for Clearwire. Dish's new bid also trumped Sprint Nextel Corp.'s (US-S) $3.40-a-share offer to acquire the 50% of Clearwire that it doesn't already own.

Online travel agency Priceline.com Inc. (PCLN) saw its shares rise almost 2% to $807.54 after the company said late Wednesday it plans to offer $1 billion worth of seven-year convertible bonds and repurchase another $1 billion of its stock.

Among other leading tech stocks, gains came form Apple Inc. (AAPL), Yahoo Inc. (YHOO), Cisco Systems Inc. (CSCO) and Microsoft Corp. (MSFT).

The tech-sector gains helped lift the Nasdaq Composite Index (RIXF) by almost 24 points to close at 3,491. The Philadelphia Semiconductor Index (SOX) climbed 1.5% and the Morgan Stanley High Tech 35 Index (MSH) also closed with a small gain.

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