Nvidia and Microsoft are knocking on the door of $4 trillion market caps. Nvidia deserves a lot of credit for being the backbone behind AI development. AI has added to Microsoft’s investment thesis rather than redefining it.

Nvidia could be poised to claim the title of most valuable company in history, as its market capitalization nears $4 trillion. The chipmaker's shares closed at an all-time high Thursday, bringing its market value closer to Apple's record of $3.91 trillion set in December.

The 4th of July is a national holiday, and both the NASDAQ (where NVIDIA is traded under the stock symbol NVDA) and New York Stock Exchange are closed in observance of the holiday. So NVIDIA's next opportunity to make history is at the end of the trading day on July 7,