Check out some of the companies making the biggest midday moves: Airlines — Delta Air Lines , United Airlines , Southwest Airlines and American Airlines surged roughly 4% after President Donald Trump said the U.S. wouldn’t strike key energy infrastructure in Iran for five days and said the two nations had held productive talks. Crude oil prices, a determinant of jet fuel costs, slumped 10%. Travel stocks — Travel-related names rose on Monday on optimism that demand will get a boost if the Iran war is resolved. Online travel booking site Booking Holdings rose nearly 2%, short-term rental platform Airbnb climbed almost 3% and hotel chains Hyatt Hotels , Marriott International and Hilton Worldwide Holdings added around 3%. Palantir Technologies — Shares jumped more than 4% after a Reuters report said the Pentagon will use Palantir’s Maven artificial intelligence system for weapons targeting as its core military AI platform. The designation would go into effect by Sept. 30, the end of the government’s fiscal year, and allow for the system to be used across all arms of the military and receive stable, long-term funding. Cruise lines — Carnival and Royal Caribbean Cruises jumped almost 6% and close to 5%, respectively, on the latest development in the Iran war. Cruise lines have also fallen amid concerns about the economic fallout from the war …
