Top Trillion-Dollar Stocks to Buy and Hold in Your 20s

The S&P 500, an index tracking 500 major U.S. companies across various sectors, has yielded an average annual return of 10.7% since its inception in 1957. This performance includes periods of market downturns, corrections, and bear markets, making an S&P 500 index fund a reliable foundation for wealth building over time.

However, younger investors often have the advantage of time, which allows them to accept more risk in exchange for the possibility of higher returns. Investing in a diversified portfolio of around 50 individual stocks can bring increased volatility compared to the broader market. Yet, this approach could pay off significantly, especially when considering the exceptional gains delivered by technology giants like Amazon and Microsoft since their public listings.

Amazon's stock has surged an incredible 338,180% since its 1997 initial public offering, equating to a compound annual growth rate of 32.3%. Microsoft, which went public in 1986, has experienced an even more dramatic rise of 676,310%, with an annualized return of 24.7%. These numbers highlight the potential for substantial wealth accumulation through ownership in leading tech companies.

Emerging technologies, particularly artificial intelligence (AI), continue to drive growth opportunities for these firms. Both Amazon and Microsoft are investing heavily in AI, suggesting they have room to expand further.

Amazon: Beyond E-Commerce

Amazon began as an online bookseller, a novel idea in the 1990s. Today, its e-commerce platform offers over 600 million products and remains its largest revenue source. Yet, the company's cloud computing division, Amazon Web Services (AWS), has captured increasing attention from investors over the past decade.

AWS provides a broad array of digital tools that support businesses in the evolving digital landscape. In recent years, AWS has become central to Amazon's AI ambitions. It operates a global network of data centers equipped with thousands of specialized AI chips sourced from partners like Nvidia. Amazon has also developed its own AI chips, such as Trainium3, which outperform competitors in price and performance.

The chip segment within AWS already generates annualized revenues exceeding $25 billion. Still, Amazon's AI strategy extends beyond hardware. The AWS Bedrock platform offers hundreds of pre-built AI models from leading research organizations, including OpenAI and Anthropic, to help developers accelerate their AI projects.

Additionally, AWS features its own AI-powered coding assistant named Kiro, which saw usage triple in the second quarter of 2026 alone. This growth underscores the increasing demand for AI solutions and Amazon's efforts to position AWS as a critical player in this space.

Microsoft: A Tech Powerhouse

Microsoft's stock performance over the past few decades reflects its ability to adapt and innovate. The company has successfully transitioned from a software-centric business to a major cloud services provider, with its Azure platform competing closely with AWS.

Microsoft also invests heavily in AI technologies, integrating advanced features into its software products and cloud services. These initiatives contribute to sustained growth and help maintain the company's leadership within the technology sector.

Why These Stocks Matter for Young Investors

For investors in their 20s, the combination of time and the ability to tolerate market fluctuations makes long-term investments in companies like Amazon and Microsoft appealing. Their history of remarkable returns and ongoing commitment to innovation, especially in AI, suggest these stocks could continue to deliver strong growth.

While investing in the broader market through index funds remains a proven strategy, adding high-potential individual stocks can enhance portfolio performance. Amazon and Microsoft represent two trillion-dollar companies with established track records and promising futures, making them attractive choices for building wealth over decades.

As technology evolves and AI becomes increasingly integrated into business operations worldwide, these companies are well positioned to benefit. Their strong balance sheets, extensive infrastructure, and continuous research and development provide a foundation for continued success.

In summary, young investors looking to maximize their growth potential might consider acquiring shares in Amazon and Microsoft and holding them for the long term. With both companies deeply involved in cutting-edge technology trends, they offer potential beyond traditional market returns.