U.S. stocks rose and erased their losses for the week so far, as Nvidia and other technology companies led the way. The S&P 500 gained 0.8% Wednesday for a second straight gain following Monday’s swoon. The Dow Jones Industrial Average added 0.6%, and the Nasdaq composite climbed 1.3% as stocks in software and other tech-oriented industries continued their rebound. Nvidia was one of the strongest forces lifting the market ahead of its highly anticipated profit report, which arrived after trading ended for the day. Stock indexes rose in Europe and Asia, while Treasury yields held steady.