By Benjamin Pimentel, MarketWatch

SAN FRANCISCO (MarketWatch) -- Google, Facebook and Twitter led technology stocks lower on Tuesday, joining a broader market retreat.

Groupon (GRPN) shares also slipped 2.6% to close at $6.28, after posting gains on a B. Riley upgrade. B. Riley raised its rating to buy from neutral, citing potential gains from the online daily deals site's recent initiatives, including a bigger marketing push.

Twitter Inc. (TWTR) fell 7% to close at $37.41, while Google (GOOGL) gave up 2.1% to close at $578.40 and Facebook (FB) shed 3.9% to close at $62.76.

The Nasdaq Composite Index (RIXF) fell 1.4% to close at 4,391 as the Dow Jones Industrial Average (DJI) shed 117 points.

The tech sector also was weighed down by losses in shares of Hewlett-Packard (HPQ) and Apple Inc.(AAPL),.

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