 Burlington Stores Inc. shares BURL, 7.45 slid 7.9 in premarket trade Thursday, after the discount retailer posted weaker-than-expected earnings for the first quarter and lowered its full-year guidance. The company posted net income of 16.2 million, or 24 cents a share, for the quarter to April 30, donw from 171.0 million, or 2.51 a share, in the year-earlier period. 