Lockheed Martin stock dropped early Thursday after catching a Wall Street downgrade. TD Cowen analyst Gautam Khanna downgraded shares of the defense contractor to Hold from Buy, citing uncertainty about prospects for its F-35 jet under the second Trump administration and “fairly persistent execution challenges.” Lockheed’s loss of the F-47 sixth-generation fighter jet program to Boeing —announced in March—will result in some additional expenses, he says, adding there have been “cost overruns on a classified aero program.”