Jan Koum, the co-founder of WhatsApp, is leaving Facebook. He had reportedly clashed with the social media giant over its data collection practices. Koum sold WhatsApp to Facebook in 2014 for roughly $19 billion. Apple is set to report quarterly earnings after the markets close today. Investors will be paying close attention to this report since the stock has fallen significantly in the past month. There are fears of waning iPhone demand, and some even speculate Apple could discontinue the iPhone X.