NEW YORK (TheStreet) -- Marvell Technology (MRVL) - Get Reportshares rose 8.9% to $15.85 in premarket trading Friday after the Santa Clara, Calif.-based chipmaker gave an above-consensus outlook for the second quarter during its conference call on Thursday.

Blue Coat Systems

( BCSI), a maker of Web security and network optimization applications, issued an outlook for the current quarter that came in below Wall Street's expectations.

The company also reported fiscal fourth-quarter results that were below estimates on both the top and bottom lines.

Shares of Blue Coat fell 12% to $19.67 in premarket trading Friday.

LinkedIn

(LNKD)

shares rose 1.7% to $87.80 in premarket trading. Options activity in the stock is set to begin on Friday. Many analysts and investors think the stock is overvalued.

AMB Property

( AMB) will replace

Prologis

(PLD) - Get Report

in the

S&P 500

. The industrial real estate investment trusts are in a merger agreement.

AMB shares closed Thursday at $36.16.

OmniVision

(OVTI)

, a maker of image sensors for camera phones, reported increases in fourth-quarter net income and revenue. The company said it expects first-quarter adjusted profit of 64 cents to 77 cents a share on revenue of between $265 million and $285 million. Analysts expect earnings of 71 cents a share on revenue of $277 million.

The stock fell 4.2% to $34.89.

-- Written by Joseph Woelfel

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