) --


(FB) - Get Facebook, Inc. Class A Report

was a big loser in premarket trading on Monday, tumbling 4.81% to $21.76 after a

Barrons report

said the stock is worth just $15.

Shares of the Menlo Park, Calif.-based company had


recently thanks to a number of catalysts, including a new advertising platform.

The social networking phenomenon was also one of the most active premarket Nasdaq stocks on share volume of 965,572.

Shares of Apple slipped 2.15% to $685.01 as investors responded negatively to the company's announcement of 5 million iPhone 5 sales over the weekend. The eagerly anticipated smartphone hit retail stores on Friday.

The tech giant, which continues to




over a recent $1 billion jury verdict, was also one of the most active premarket Nasdaq stocks on share volume of 218,639.

TheStreet Recommends

Micron Technology

(MU) - Get Micron Technology, Inc. (MU) Report

, which reports its fourth-quarter results after market close on Thursday, fell 2.04% to $6.23. Analysts surveyed by

Thomson Reuters

expect Micron to report a loss of 22 cents a share on revenue of $2.12 billion.

In a note released on Monday, Nomura Securities said that it remains cautious heading into Micron's earnings.

"Micron's stock tends to be 'penalized' more for PC weakness than it is 'rewarded' for flash memory strength," wrote Nomura analyst Romit Shah. "Until bothbusinesses are on the upswing, we would stay on the sideline."

Sirius XM

(SIRI) - Get Sirius XM Holdings, Inc. Report

shares were unchanged at $2.54 in premarket trading on share volume of 108,071.

--Written by James Rogers in New York.

Follow @jamesjrogers

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