Zillow Group Inc on Thursday raised its revenue forecast for the unit that manages the business of buying and selling homes after the online real-estate firm said it had made “significant progress” in winding down inventory. The company, which operates popular home valuation tool Zestimates, said it now expects fourth-quarter revenue in its homes segment of $2.3 billion to $2.9 billion, compared with its prior estimate range of $1.7 billion to $2.1 billion. They have fallen over 37% since the company announced its exit from the home-flipping business “Zillow Offers” early in November, citing home price volatility.