Coinspeaker Airlines Stocks Down after Warren Buffett Exited Stakes in Four of the Largest U.S. AirlinesAirlines stocks slid further on Monday after investor Warren Buffett said that Berkshire Hathaway exited its stakes in four of the largest U.S. air carriers American, United, Delta and Southwest airlines due to the coronavirus.Airlines Stocks Down after Warren Buffett Exited Stakes in Four of the Largest U.S. Airlines