Nvidia tops Microsoft, regains most valuable company title for first time since January
1. Nvidia's market cap reaches $3.45 trillion, surpassing Microsoft's. 2. Shares rose 3% recently, boosted by AI chip demand. 3. Nvidia reported 69% YoY growth in Q1 sales. 4. Major companies buy Nvidia's AI chips for advancements. 5. Nvidia continues to dominate chip market despite trade concerns.