Top U.S. consumer electronics chain Best Buy's (NYSE:BBY) December same-store sales fell 4% as it lost bargain-hungry shoppers to rivals that offered bigger discounts.

The retailer, which also reaffirmed its 2011 profit outlook, said on Friday that sales at stores open at least 14 months declined 5% in its domestic segment and 0.1% internationally.

Overall sales in the month slipped 1.6% to $8.4 billion.

Shares of the company were about 1% higher in premarket trading