US stocks today: US stocks climb as US, Iran halt attacks; Comcast surges on spin-off plan

US markets climbed on Monday with the Dow up 0.54 percent at 52,154, S&P 500 up 0.80 percent at 7,413, and Nasdaq up 1.34 percent at 25,637, as diplomatic efforts between the US and Iran eased geopolitical tensions. Comcast surged 9.8 percent on plans to spin off NBCUniversal and Sky into two separate listed companies, while investors also weighed the upcoming Q2 earnings season and expectations of at least one Fed rate hike. AI spending concerns and the release of June US jobs data later this week remain key catalysts for market direction.