Tech giants Apple (NASDAQ: AAPL) and Nvidia (NASDAQ: NVDA) are on top of the world nowadays. They are the two most valuable stocks on the market, looking back at market-beating returns in the past five years. Apple's total returns delivered a compound average growth rate (CAGR) of 36% in that period. Nvidia soared even higher with a 100% five-year CAGR. The artificial intelligence (AI) boom has been mighty kind to Nvidia's investors.

They achieved these massive gains in a strong era for the general market, but the S&P 500 index looks downright sleepy by comparison:

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Source Fool.com