Citi analyst Peter Christiansen raised his price target for CoStar Group to $840 from $750 saying he views the company's proposed acquisition of RentPath out of receivership as a "classic marketplace scale-up opportunity." Longer-term, it's not difficult to view the deal as a margin enhancer on operating leverage tailwinds alone, while an incrementally better competitive position should help to better scale down-market ad buyers and overall visitor growth, Christiansen tells investors in a research note. He believes CoStar's "earnings power transformation story has significant runway remaining" and keeps a Buy rating on the shares.