AMAZON SCOOPS UP WHOLE FOODS: Here's what you need to know

Stocks were little changed on Friday.
The Dow and the S&P 500 finished slightly up, while the Nasdaq closed slightly down.
First up, the scoreboard:
Dow: 21,384.28, +24.38, (+0.11%)
S&P 500: 2,433.15, +0.69, (+0.03%)
Nasdaq: 6,151.76, -13.74, (-0.22%)
US 10-year yield: 2.153%, -0.009
WTI crude oil: $44.73, +0.27, +0.61%
1. Amazon is buying Whole Foods for $13.7 billion. The online-retail giant said Friday it was buying the high-end grocer for $42 a share in an all-cash dea