5 Things to Know Before the Stock Market Opens on Thursday

Stock futures are lower amid a tech sector sell-off this morning; Alphabet shares plunged after a disappointing earnings report from the Google parent; Microsoft shares rose after the company's results topped Wall Street estimates; Amazon is set to follow with its own third-quarter report tonight; and shares of Marvell and Lumentum are making big moves after a report that the companies are in deal talks. Here's what you need to know today.