Nvidia (NVDA 0.12%) has added an eye-popping $2.3 trillion to its market capitalization since the beginning of 2023, thanks to soaring demand for its data center chips that are the best in the industry for powering and training artificial intelligence (AI).Nvidia has put some of its incredible wealth to work by investing in a small portfolio of other AI stocks. SoundHound AI (SOUN -2.82%) was one of them, but the chip giant sold its entire stake during 2024's fourth quarter, according to its latest quarterl ...