Two popular stocks among tech investors lately are Rigetti Computing (NASDAQ: RGTI), which makes quantum computing hardware and software, and the semiconductor company Nvidia (NASDAQ: NVDA). While Nvidia is a much more direct bet on the booming artificial intelligence (AI) market, Rigetti’s quantum computing systems are integrated into some existing AI. Both stocks have soared, too, with Rigetti up 34% and Nvidia skyrocketing 342% over the past three years, compared to the S&P 500’s 15% rise.