By Rex Crum, MarketWatch

SAN FRANCISCO (MarketWatch) -- Tech stocks put in a disappointing market session Wednesday, with broad declines across the sector following negative reaction to the earnings reports and outlooks from Juniper Networks Inc. and Broadcom Corp.

Juniper (JNPR) shares fell 6.4% to $19.05 after the networking-technology company reported better-than-expected third-quarter results, but gave a fourth-quarter outlook potentially below Wall Street analysts' estimates. Juniper said it would cut 3% of its workforce amid slowing demand for telecom equipment.

Broadcom (BRCM) shares were down almost 3% to close at $26.36 after the communications chipmaker also gave a quarterly forecast that disappointed investors. Analyst Betsy Van Hees, of Wedbush Securities, cut her rating on Broadcom to neutral, and took down her price target on the stock to $27 a share from $33, saying the company is facing a "much choppier than anticipated mobile market" and 2014 will be a year of rebuilding.

Chip company Altera Corp. (ALTR) on Tuesday reported a 24% drop in its third-quarter earnings and a weaker-than-expected fourth-quarter outlook. Altera's shares fell 13.5% to end the day at $32.30.

Cree Inc. (CREE) shares slumped by almost 17%, to close at $61.77, after the LED-lighting technology company reported fiscal first-quarter sales that missed expectations and gave a second-quarter forecast that fell short of Wall Street analysts' outlooks.

LinkedIn Corp. (LNKD) gave up 1.7% to fall to $240.83 as the business social-networking company held event in San Francisco to give details about its mobile strategy. One new mobile feature gives users expanded profile information on people who email them.

Other declines came from Yelp Inc. (YELP), Microsoft Corp. (MSFT), Intel Corp. (INTC), Facebook Inc. (FB) and Amazon.com Inc. (AMZN).

A few gainers managed to emerge, with Corning Inc. (GLW) up more than 14%, to close at $17.52. Before the market opened, Corning said it would buy out Samsung Electronics' stake in the company's LCD panel joint venture, and that Samsung could take a 7.4% stake in the maker of Gorilla Glass.

Apple Inc. (AAPL) shares rose almost 1%, to $524.96, a day after the company unveiled the new iPad Air tablet, and gave updates on its line of Mac computers.

Netflix Inc. (NFLX) shares rose 2.4% to $330.24. On Tuesday, investor Carl Icahn said he sold almost 3 million shares of Netflix stock, or more than half his stake in the video-streaming company.

The Nasdaq Composite Index (RIXF) fell more than 22 points to close at 3,907, while the Philadelphia Semiconductor Index (SOX) was off by 3.4%.

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