(Read time: 3 mins) Successful investing is rarely about picking this year’s hottest market. It’s about setting yourself up—decade after decade—to capture the world’s long‑term growth, wherever it shows up. This way, you can fund the life you want, especially once you start drawing down your portfolio (“decumulation”). The numbers in the table below, pulled straight from our latest Matrix Book update, tell the story.

1. Returns arrive unevenly—but they arrive

Over the last six decades, leadership has rotated dramatically among asset classes. The S&P 500 lost money in the “lost decade” of 2000‑2009 (‑0.9% per year), while U.S. small‑value stocks advanced +12.4%. International small‑value stocks surged 23.4% a year in the 1970s but have been far more subdued since. Even bonds have seesawed, posting a solid +12.4% in the 1980s and slipping to -0.3% in 2020‑2024. These wide swings are precisely why we diversify: no one can reliably predict next decade’s winners.

2. Patience turns small dollars into real wealth

A single dollar invested in 1970 grew to $304 in the S&P 500—but ballooned to $1,894 in U.S. small‑value stocks and $1,415 in international small‑value stocks. Cash left in one‑month T‑bills became just $11. Compounding rewards disciplined investors who stayed the course through booms, busts, stagflation, and global crises.

3. “Home bias” leaves opportunity on the table

As of year‑end 2024, U.S. companies made up about 65% of global market capitalization, up from 54% in 2019. International developed markets accounted for 25%, while emerging markets accounted for an additional 10%. Owning only U.S. equities ignores more than a third of the investable world and concentrates your fate in a single economy.

4. Global balance matters even more in decumulation

When you’re adding to your nest egg, volatility is uncomfortable but manageable. Once withdrawals begin, poor returns early in retirement can permanently dent your plan (the “sequence‑of‑returns” problem). A globally diversified mix of U.S., international, and emerging‑market stocks—paired with high‑quality bonds and cash—spreads that risk across thousands of companies, sectors, and currencies. This breadth smooths the ride and helps secure the steady cash flow retirees need.

5. Key takeaways for investors

•Embrace uncertainty. The decade‑by‑decade record shows there is no predictable pattern—so design a portfolio that thrives without predictions.

•Diversify by size, style, and geography. U.S. large caps alone are insufficient; small‑value, international, and emerging stocks have each delivered leadership at different times.

•Stay invested. Compounding works only for capital that remains in the market.

•Plan for withdrawals. A balanced global allocation plus a disciplined rebalancing and spending policy reduces the impact of any single market’s slump.

“Owning the world” is not a slogan; it is the data‑driven path toward meeting long‑term goals while sleeping better at night.

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