Rick Winters, vice president at Adviser Investments, has the market analysis for Wednesday, September 19. Major U.S. stockA financial instrument giving the holder a proportion of the ownership and earnings of a company. indexes saw mixed results, with the Dow Jones Industrial Average and S&P 500 gaining 0.6% and 0.1%, respectively, and the NASDAQ experiencing fractional losses. Microsoft declined 1.3% on tariff-related concerns—despite announcing a 10% dividendA cash payment to investors who own stock in the company. increase. Canadian medical marijuana producer Tilray saw dramatic price fluctuations: Its stock peaked up 98% intraday before closing with 38% gains after the Drug Enforcement Administration announced its approval of the company’s plan to import and test cannabis within the United States.