STOCKS FINISH MIXED: Here's what you need to know

Stocks finished mixed as earnings season pressed on amid gradually improving economic data.
The S&P 500 was little changed, while the Dow gained 0.4% and the Nasdaq lost 0.4%. The Nasdaq, heavily weighted toward mega-cap tech stocks, proved once again that it's capable of having a mind of its own in going against the broader indices.
Meanwhile, recently-IPOed social media startup Snap had a volatile first day of trading following the expiration of its first post-offering share lock-up.