AI stocks got hit hard this week, but AMD managed to buck the trend.Advanced Micro Devices (AMD 0.46%) stock managed to close out the past week of trading with substantial gains despite bearish momentum for artificial intelligence (AI). The company's share price gained 5.7% across the stretch. Meanwhile, the S&P 500 inched 0.1% higher after some big swings, and the Nasdaq Composite declined 0.5%.AMD's valuation defied valuation gravity impacting AI stocks thanks to a strong showing at its investor day confe ...