On Monday, the S&P 500 and the Nasdaq closed at record highs after OpenAI and Advanced Micro Devices reached a mega-deal that ignited a rally, despite the U.S. government shutdown entering its second week. Photo by John Angelillo/UPI | License PhotoOct. 6 (UPI) -- The S&P 500 and the Nasdaq closed at record highs Monday after ChatGPT-maker OpenAI and Advanced Micro Devices reached a mega-deal that ignited a rally, despite the U.S. government shutdown entering its second week.Chipmaker AMD shares closed 23.7 ...