Shares of the AI tech leader are now up 49.7% so far in 2025.Shares of Nvidia (NVDA +4.98%) jumped 5% on Tuesday to an all-time closing high of $201.03. This increase brings shares of the artificial intelligence (AI) tech leader to a year-to-date gain of 49.7%. For context, the S&P 500 index has returned 18.4% over this period.Tuesday's gain is attributable to Nvidia announcing a slew of new products and partnerships at its GTC Washington event. This is the first time the company has held a GTC (or GPU Tech ...