Zillow’s (ZG)  stock was under pressure on Monday, falling 8% as reports emerged that Alphabet (GOOGL)  is testing real estate listings in its Google search results.Although a test, Google has displayed home listings that include complete property detail pages, as well as options to contact agents and request tours of the homes in a limited number of markets, and only on mobile devices. If it were anyone else, the market’s reaction to potential disruption fears that Zillow could face from an inspiring compe ...