zillow group traded higher monday after shares of the online housing company were upgraded with an analyst expressing confidence in a housing market that could become more affordable bofa securities analyst curtis nagle upgraded shares of zillow ticker z to buy from underperform and raised his price target to 42 from 22 nagle wrote in a research note that current demand for housing is historically low as home prices have soared and mortgage rates have risen but nagle predicted a bottom to the housing market this year