Stock Market Today: Dow Loses Ground As Iran Deadline Nears; These IBD 50 Names Are Moving (Live Coverage)

The Dow Jones Industrial Average and other major stock indexes continued to show losses Tuesday as President Donald Trump's deadline for Iran to open the Strait of Hormuz approaches. Meanwhile, Lumentum Holdings showed positive action while UnitedHealth Group topped the Dow on the stock market today. Stocks remained in the red in the final hour of trading with Dow falling 0.5% and the S&P 500 sliding 0.4%.