Brian Mackey, deputy director of research at Adviser Investments, has the market analysis for Thursday March 7. Major U.S. market indexes saw a fourth consecutive days of losses. Both the Dow Jones Industrial Average and S&P 500 dropped 0.8% and the NASDAQ fell 1.1% as investors reacted to the slowdown concerns in the European Central Bank’s economic stimulus program announcement. Meanwhile, Costco’s stockA financial instrument giving the holder a proportion of the ownership and earnings of a company. rose 4% in post-session trading after the wholesale retailer reported a 7% quarterly gain in comparable sales and 26% e-commerce sales surge.