Nvidia has delivered such massive gains in recent years that it's easy to overlook how the stock has performed over the short term. Most investors would be happy with a 20% gain in a year. Nvidia's share price has soared over 20% in the last five weeks.

Wall Street's main indexes were on track for a muted open on Wednesday, following a selloff in tech and oil stocks in the previous session, as investors parsed quarterly results from banks including Morgan Stanley.

Morgan Stanley traders and bankers joined the rest of their Wall Street rivals in posting better-than-expected revenue, fueling a 32% profit surge for the third quarter and sending the shares up the most this year.