The S&P 500 and Nasdaq snap five-day losing streaks and the Dow Industrials jump to a record high as deal activity returns to start the week. Comcast announces plans to spin off NBCUniversal and Sky into a separate publicly traded company, Rocket Lab agrees to buy satellite operator Iridium Communications in an $8 billion cash-and-stock deal, while Martin Marietta Materials agrees to buy Lhoist North America for $13.5 billion. Last week's technology selloff loses momentum, while the expected resumption of peace talks lifts sentiment. DJIA gains 306 points, or 0.6%, to 52182, the S&P 500 rises 1.2% to 7440 and the Nasdaq climbs 2.1% to 25820. (patrick.sullivan@wsj.com)