Year to date, Nvidia (NVDA 1.69%) stock has returned 2%, while Palantir Technologies (PLTR 0.20%) stock has advanced 72%. But forecasts from Wall Street analysts suggest that investors should buy one and sell the other. However, Wall Street has consistently underestimated Palantir, so investors shouldn't simply follow analysts' opinions. Here's a closer look at both companies. Nvidia: 30% upside implied by Wall Street's median target price Nvidia reported encouraging financial results in the first quarter o ...