Union Pacific (NYSE:UNP) was raised to buy from hold at Jefferies after the railroad operator confirmed it was in talks with Norfolk Southern (NYSE:NSC) about a business combination. Investors should start building a position in Union Pacific (NYSE:UNP) to "get in on the ground level" on what is likely a "transformational" combination,

The combination of two large rail companies would create the first coast-to-coast network, but the deal could reduce competition.

Union Pacific , the largest U.S. railroad operator, said on Thursday it is in advanced talks with rival Norfolk Southern , signaling that a deal to form a $200 billion coast-to-coast rail company could be close - and potentially trigger further consolidation among remaining freight rail giants.