Recently, I've been looking at tech stocks and noticed an interesting phenomenon: the long-term returns of these three companies can truly create millionaire-level wealth accumulation.

First, let's talk about Nvidia. This company is synonymous with AI chips. Frankly, without Nvidia's GPUs, this wave of AI wouldn't be able to get off the ground. Its chips are like batteries for AI applications—they're infrastructure. The most impressive thing is that Nvidia has become a must-have for every major tech company, with clients eager to pay. Financial data shows a net profit of $31.9 billion, up 65% year-over-year, just over $10 billion short of Apple. Plus, in the second half of this year, they will release a new generation Vera Rubin chip, surpassing the current Blackwell in performance. Despite investing so much in R&D, Nvidia returned $37 billion to shareholders in the first nine months—such cash flow capability is extraordinary.

Next is Micron. This company plays a key role in AI infrastructure. It provides memory storage solutions that enable AI chips to perform at their best, directly boosting profit margins. The Q1 financial report looks great, with revenue up 57% year-over-year, and the company has abandoned consumer-grade business to focus entirely on AI infrastructure. The most interesting part is its valuation—PEG ratio is only 0.18, far below the fair value line of 1, which is rare in tech stocks—high growth paired with low valuation, such a combination is uncommon.

Amazon's situation is a bit different. Its stock price has been relatively flat over the past year, with only a 36% increase over five years, seeming unappealing. But a closer look at fundamentals shows rapid growth in cloud services and online advertising. Especially with the newly launched Trainium chip, annual revenue run rate has already exceeded $10 billion, more than doubling year-over-year. The latest quarterly report shows overall sales grew 14%, cloud business up 24%, and net profit increased 6%. Logically, such growth should support a higher stock price, but the current valuation is only 34 times P/E, which is relatively reasonable. Major institutions also see this mismatch; Morgan Stanley recently raised its target price to $300, leaving plenty of room from the current price of over $210.

All three companies have benefited from the AI wave, and holding them long-term indeed offers the chance to accumulate substantial wealth. The key is to find those with solid fundamentals that are not yet fully priced in—such opportunities make millionaire-level returns more achievable.