STOCKS SLIDE: Here's what you need to know

Stocks were relatively calm amid a flurry of business and political headlines on Monday.
Around noon ET, the Dow was down by 101 points, the S&P 500 was down 11 points, and the Nasdaq was down 12.
As for how they finished, let's head to the scoreboard:
Dow: 18,493.06 (-0.42%)
S&P 500: 2,168.48 (-0.30%)
Nasdaq: 5,097.63 (-0.05%)
WTI Crude oil: $43.11 (-2.44%)
10-year Treasury yield: 1.575 (+0.44%)
1. It's official: Verizon will acquire Yahoo for $4.8 billion. Verizon w