By Benjamin Pimentel, MarketWatch

SAN FRANCISCO (MarketWatch)--Shares of Cisco Systems and Facebook Inc. rallied Wednesday, but the tech sector was weighed down by slumping shares of Micron Technology.

Cisco (CSCO) rose 1.5% to close at $25.44, one of the best performers on the Dow Jones Industrial Average (DJI), which was up 79 points.

Facebook (FB) was up 3.5% to close at $64.97. The tech sector also got a boost from shares of Groupon Inc.(GRPN), which gained 4.8% to close at $6.58 and Hewlett-Packard(HPQ), which added 0.5% to close at $33.65.

On the downside, shares of Micron Technology (MU) fell nearly 1% to close at $32.89, while Microsoft (MSFT) slipped 0.3% to close at $41.67.

The Nasdaq Composite Index (RIXF) edged higher by 0.6% to close at 4,419. The Philadelphia Semiconductor Index (SOX) and the Morgan Stanley High Tech 35 Index (MSH) were each up a fraction.

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