Chelsea Jia Feng/BIWall Street's bullishness for Nvidia stock endures even as shares trade at record highs. Analysts are upbeat about the next-gen Blackwell chip and Nvidia's web of enterprise partnerships.Bank of America and Goldman Sachs are among the banks that have raised price targets in recent weeks.Nvidia stock is trading at record highs, but that's not deterring top Wall Street analysts from being bullish.