Stocks were little moved at Monday's opening bell as Wall Street braces itself for a potentially historic storm that may dump up to 3 feet of snow in the country's Northeast. Airlines including Delta (DAL), United (UAL) and Southwest (LUV) preemptively canceled thousands of flights, even before the first snowflakes hit the ground. Merger Monday hit the breakfast table. Post Holdings (POST), which makes brands like Honey Bunches of Oats and Raisin Brans is buying rival cereal maker MOM Brands for $1.15 billion, mostly in cash. Google (GOOG) made a deal with the NFL to broadcast game videos on YouTube. The partnership will allow content and clips but will not include live-streaming.