Eager rate watchers shouldn't jump the gun with Redfin stock.Central bank policy affects all publicly listed U.S. businesses, more or less. Among the more directly affected companies is Redfin, (RDFN -7.86%) which operates a digital residential real estate marketplace.The Federal Reserve sets the federal funds rate, which in turn affects America's mortgage interests rates. After roughly two years of elevated rates, the tide may finally turn in Redfin's favor if the Fed finally starts to reduce interest rate ...