Elon Musk sending shares of Twitter to the moon today after the Tesla CEO took a nearly 10% stake in the company. But could his passive position turn into something more aggressive? Plus Howard Schultz coming back to Starbucks (again!) and making big changes. But is he positioning the company for growth, or dealing a blow to shareholders?

The S&P dropped more than 1.5% today, with a steep sell-off coming at the end of the trading session. And with Q1 earnings season just days away, what can we expect from companies’ reports, and what will it mean for the markets?