Brian Mackey, deputy director of research at Adviser Investments, has the market analysis for Thursday February 21. After three consecutive days of gains, all major U.S. stockA financial instrument giving the holder a proportion of the ownership and earnings of a company. indexes fell 0.4% today. This decline was due, in part, to disappointing economic data, including January’s 1.2% drop in existing home sales. This is the third straight month of declining sales and January’s figure fell short of analyst expectations to a low not seen since November 2015.