The Dow on Tuesday topped the 30,000 threshold for the first time as investors grew optimistic about the economic outlook following the start of the transition of power from U.S. President Donald Trump to President-elect Joe Biden and amid reports of progress toward COVID-19 vaccines.The 30-issue Dow Jones Industrial Average soared 454.97 points, or 1.54 percent, to end at 30,046.24. The tech-heavy Nasdaq Composite Index rose 156.15 points, or 1.31 percent, to 12,036.79.New York stocks opened higher as Trump finally gave the green light to start the transition process the previous day despi…READ FULL ARTICLE