It's stock market history: The Dow Jones industrial average eclipsed 20,000 for the first time Wednesday, triggering cheers from the floor of the New York Stock Exchange, reports the AP. The Dow hit the mark upon opening for the day. The Wall Street Journal notes that the Dow was under 18,000 as recently as Nov. 4, but the markets have since spiked, buoyed in part by President Trump's promise of infrastructure projects. (More stock market stories.)