Monday's Late Winners & Losers

Stocks pulled back a bit after the closing bell Monday, but a number of winners nevertheless emerged.

Among these was MGM Mirage (MGM Quote), shares of which jumped 16.4% to $73.26 after Tracinda -- Kirk Kerkorian's investment firm and MGM's majority owner -- said it wants to buy the Las Vegas casino operator's Bellagio Hotel and Casino and City Center. Tracinda intends to enter negotiations with MGM to that end and is also considering "financial restructuring transactions involving all or a substantial portion of the remainder of the company."

Pacific Sunwear of California (PSUN Quote) rose 3.8% to $20.80 after the apparel retailer posted sales of $320.6 million for the quarter ended May 5, or $12.5 million above Wall Street estimates, per Thomson Financial. Excluding items, per-share losses were in line at 4 cents.

American Science & Engineering (ASEI Quote) was also higher after authorizing a $35 million share-repurchase plan, as well as saying it will declare the company's first-ever dividend in the next quarter. The Billerica, Mass., maker of X-ray and other inspection systems fell short of fiscal fourth-quarter targets, but shares were still climbing 5.9% to $50.80.

On the flip side, Dynegy (DYN Quote), a Houston-based electric utility, sank 4.6% to $9.70 after Chevron (CVX Quote), which owns around 12% of the company, said it will publicly offer all of its 96.9 million Dynergy shares. Chevron lately slipped 11 cents at $82.72.