Nvidia's GTC conference is set to make a major impact, and Wells Fargo has already expressed its bullish sentiment.

Wells Fargo said Nvidia's (NVDA.US) stock price has fallen sharply in recent weeks, presenting a "buy opportunity", and upgraded the stock to "Overweight" with a target price of $185 ahead of its annual GTC conference, which is expected to focus on artificial intelligence (AI), graphics and humanoid robots, among other areas. Nvidia is due to hold its annual GTC conference in San Jose, California from March 17 to 21.