U.S. stocks fell sharply after reports showed that worries among consumers and businesses about President Donald Trump’s policies may be hitting the economy.

Shake Shack named a new CEO on Thursday, the first outsider to lead the company in its 20-year history.

Lynch was named CEO of Papa John's Tuesday morning. He replaces Steve Ritchie, the veteran Papa John's executive who took over in the wake of the scandal surrounding founder and former CEO John Schnatter. Starboard CEO Jeffrey Smith took over as Papa John's chairman. "I am thrilled to welcome Rob to Papa John's at this pivotal moment in the company's history," Smith said in a statement. Shares of Papa John's, which rallied on the news of Lynch's hiring, are up more than 10% this year.