Grim Holiday Sparks Best Buy Nosedive and Other #Stocks2Watch

#Stocks2Watch: FOX Business rounds up the stocks you should watch before the opening bell rings on Wall Street. Tweet @adamsamson or e-mail adam.samson@foxbusiness.com and tell us what stocks you're watching -- your picks could appear online!

1. Best Buy [BBY]

FOX Business assignment editor Jessica MacKenzie said she's watching shares of Best Buy, which are plunging 30% in pre-market trading. She writes:

Same store sales dropped almost 1% for December due in part to slower foot traffic during the holidays. Best Buy adds that it chose to keep prices competitive, which pushed costs higher.

2. Citigroup [C]

Citigroup snapped the chain of big bank earnings beats. The No. 3 U.S. bank by assets posted weaker-than-expected results on the top and bottom lines. The shares are dropping 3% in pre-market trading.

3. BlackRock [BLK]

BlackRock, the world's biggest money manager, unveiled quarterly profits and revenues that topped Wall Street's estimates. The shares are rallying more than 3% in pre-market trading.

4. UnitedHealth [UNH]

UnitedHealth posted stronger-than-expected quarterly results and solid enrollment figures. However, shares of the biggest U.S. health insurer are still sliding 2% in the pre-market.

5. CSX [CSX]

CSX shares are tumbling 6% in pre-market action after the railroad operator posted disappointing quarterly profits.