STOCKS ERASE GAINS, END FLAT: Here's what you need to know

Stocks were little changed on Thursday as surging healthcare companies that got a boost from the much-anticipated GOP Senate healthcare bill were offset by losses in consumer staples and financials.
The S&P 500 and Dow Jones Industrial Average were almost completely flat, while the Nasdaq eked out a less than 0.1% increase. All three indexes moved higher earlier in the day before erasing gains in the last hour of trading.
First up, the scoreboard:
Dow: 21,397.29, -12