A Home Depot employee is seen outside a store in Los Angeles, California.

Check out the companies making headlines in midday trading.

Mastercard — Shares of Mastercard fell 6.7% after the credit card company issued a warning that the fast-spreading coronavirus could hurt its revenue this year. "Cross-border travel, and to a lesser extent cross-border e-commerce growth, is being impacted by the Coronavirus," the company said in a statement. Mastercard also named its product chief Michael Miebach as CEO, while Ajay Banga is moving to executive chairman.