(Bloomberg/Jessica Menton) — US stocks rose to record levels shortly after the opening bell Monday as investors looked past the government shutdown, now in its sixth day. Instead they cheered a multibillion-dollar infrastructure deal that signaled the artificial intelligence spending boom remains on track.

The S&P 500 Index was up 0.3% as of 9:35 a.m. in New York, after notching its seventh winning week in the last nine. The Nasdaq 100 Index advanced 0.8%, with Advanced Micro Devices Inc. soaring 31% — on track for its biggest gain since April 2016 — after inking a deal with OpenAI to roll out AI infrastructure in a pact the chipmaker said could generate tens of billions of dollars in new revenue. Nvidia Corp., AMD’s main competitor in graphics processors, came under pressure, falling 2.2

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