Deutsche Bank analyst Lloyd Walmsley says he's "confused but intrigued" by Zillow's shift to buying and selling homes. The analyst continues to have "misgivings, lack of certainty, and concerns" about the core business, but says the potential total addressable market if the unit economics can work "could be massive" for Zillow. The company is making "big shift" out of a high margin, asset light, high return on invested capital business model to a "risky capital-intensive move into a low margin business with limited direct competency," Walmsley tells investors in a research note. He keeps a Hold rating on Zillow.