Here's a look at the main movers as of 10:57 a.m. in New York on Monday:
RISERS
Alcoa (NYSE:AA) advanced 2.6% to $9.31 after the top U.S. aluminum maker announced plans to split itself in two.
Media General (NYSE:MEG) rallied 23% to $13.75 after Nexstar Broadcasting Group (NASDAQ:NXST) offered to buy the local-television station owner for $1.85bn. Nexstar fell 1.1% to $44.02, erasing earlier gains.
FALLERS
Apple (NASDAQ:AAPL) fell 1.4% to $113.14 even as the smartphone maker reported record sales of its new iPhone models over the weekend.
Comcast (NASDAQ:CMCSA) fell 1.9% to $55.48 after the largest U.S. cable operator said it will buy a majority stake in Universal Studios Japan for $1.5 bn.
Sprint (NYSE:S) fell 3.8% to $4.14 after the fourth-largest U.S. mobile operator said it will not participate in a scheduled auction of government airwaves set for early 2016.
ADRs of Shell (NYSE:RDS.B) slid 2.8% to $45.98 after Europe’s largest oil company halted drilling in the Burger well, offshore Alaska, and decided to cease further operations in the Arctic exploration project for the foreseeable future.
ADRs of Novo Nordisk (NYSE:NVO) skidded 0.8% to $54.51, erasing an earlier rise, after the world's largest insulin maker obtained U.S. Food and Drug Administration approval for its diabetes drug Tresiba.
Cal-Maine Foods (NASDAQ:CALM) tumbled 12% to $50.81 after the largest U.S. egg supplier reported downbeat earnings its fiscal first-quarter hurt by the impact of the national outbreak of avian influenza.