Shares of online real estate listing companies tumbled on Monday after Alphabet's Google was found testing a new format that places homes-for-sale ads directly at the top of search results, threatening to encroach on a core source of traffic and leads for property portals. Zillow Group led the declines, with shares down 10.8% in morning trade. The drop put the stock on course for its steepest fall since March 2024 and its lowest close since late May 2025, according to Dow Jones Market Data. Other real estat ...