On the upside
American Railcar Industries (Nasdaq: ARII) offered a premium of approximately $543 million to acquire Greenbrier Companies (NYSE: GBX).
A Seeking Alpha contributor expects cold weather boost natural gas prices. Shares of Magnum Hunter Resources (NYSE: MHR) rose.
On the downside
GT Advanced Technologies (Nasdaq: GTAT) forecast 2013 earnings that fell far short of analyst expectations. Concerns of more stringent gun control laws weighed down shares of Sturm, Ruger & Co. (NYSE: RGR).
FactSet Research (NYSE: FDS) reported higher first quarter earnings but the company forecast current quarter results below estimates.
In the broad market, advancing issues outpaced decliners by a margin of nearly 5 to 2 on the NYSE and by 2 to 1 on Nasdaq. The broader S&P 500 index climbed 11 points to 1441.