The Dow Jones Industrial continues to play hard-to-get with the 17,000 milestone mark. Major U.S. markets ended mixed but virtually flat with no volume. The Nasdaq was pushed lower by GoPro (GPRO). Shares of the video camera maker dropped for the first time after doubling since its IPO last week. JP Morgan (JPM) shares also fell as investors digest the news that Jamie Dimon, the bank's CEO, has 'curable' throat cancer. Constellation Brands was a big winner for the S&P 500. The beer and wine giant pleased investors after beating earnings expectations. TheStreet's Susannah Lee reports from Wall Street.