Here's everything you must know before Friday's opening bell:

-U.S. stock futures pointed to a mixed start thanks to uncertainty over tensions in the Middle East and ahead of bank earnings.

-Earnings expected Friday from Citigroup (C) , Wells Fargo (WFC) and PNC Financial (PNC) . JPMorgan Chase (JPM) reported this morning and beat

-Trump issued an executive order to study the Postal Service, after he accused Amazon (AMZN) of taking advantage of the organization.

-Tesla (TSLA) was kicked off the group investigating a fatal crash in California violated the agreement that involved its Autopilot system

-Broadcom Inc. (AVGO) , an Action Alerts PLUS holding, announced Thursday a $12 billion share repurchase program that will run until Nov. 3, 2019.

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