Zillow (Nasdaq: ZG) shares fell 4.3% on Wednesday after the Federal Trade Commission (FTC) filed an antitrust lawsuit against the company and Rocket Companies' (NYSE: RKT) subsidiary Redfin, alleging that the real estate platforms entered into an unlawful agreement to suppress competition in the online rental housing advertising market. Rocket shares fell 3% during after-hours trading.The FTC complaint highlighted a $100 million (£74 million) agreement between the companies, executed in February, under whic ...