纳指涨幅扩大至1%，道指转涨。英伟达(NVDA.O)涨超2%。

Core Viewpoint - The Nasdaq index has increased by 1%, while the Dow Jones has turned positive, indicating a positive shift in market sentiment. Nvidia (NVDA.O) has seen a rise of over 2% [1] Group 1 - The Nasdaq index has expanded its gains to 1% [1] - The Dow Jones index has shifted to a positive territory [1] - Nvidia (NVDA.O) stock has increased by more than 2% [1]