By Rex Crum, MarketWatch

Tech stocks began the week with another session of losses as nearly every big-name sector leader ended the day in the red and contributed to the tech-heavy Nasdaq Composite Index posting its biggest three-day loss in almost three years.

The Nasdaq (RIXF) fell almost 48 points, or 1.2%, to close Monday at 4,079. For the past three market sessions, the Nasdaq has given up 4.7%.

Among leading tech stocks, Microsoft (MSFT) shares shed 7 cents to close at $39.80, Apple Inc. (AAPL) gave up $8.35 a share to close at $523.47, eBay Inc. (EBAY) fell almost 2% to $52.95 and Yahoo Inc. (YHOO) ended the day with a loss of 3.5% at $33.07.

A report in The Wall Street Journal said Yahoo is working on plans for more video content, including the acquisition of original programming.

Declines came from Groupon Inc. (GRPN), LinkedIn Corp. (LNKD), NetApp Inc. (NTAP) and Pandora Media Inc. (P), which fell by $1.41 a share,or almost 5%, to close at $26.99 even though Wedbush Equity Research analyst Michael Pachter raised his rating on the Internet radio company to outperform from neutral and maintained his $35-a-share price target.

The few gainers included IBM (IBM), which rose $2.75 a share to $194.52, Facebook Inc. (FB), up by 20 cents a share to close at $56.95 and Netflix (NFLX), which rose 69 cents a share to end the day at $338.

Netflix appeared to get a mild benefit from a rating upgrade by Oppenheimer analyst Jason Helfstein, who raised his rating on the company to outperform from perform. Helfstein also raised his rating on Yelp Inc. (YELP), and the Internet-based consumer review and information company's shares rose 24 cents to $66.

Intel Corp. (INTC) rose 1.2% to $26.48 after Pacific Crest Securities analyst Michael McConnell raised his rating on the chip maker to outperform.

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