What $100 Invested in 1928 Would Be Worth Today

Many people think the biggest risk with money is losing it. A bad investment. A market crash. A bet that doesn't pay off.

But what if the most expensive financial decision isn't a bad choice — it's no choice at all?

That's what nearly a century of market data suggests. And the numbers are hard to argue with.

What $100 Looked Like in 1928

In the late 1920s, $100 went a long way. It could cover a month's rent in most parts of the country, with money left over for groceries, clothes, and transportation.¹

Today, that same $100 might buy dinner for the family. Maybe a tank of gas. The dollars didn't disappear — but what they could purchase quietly shrank, year after year, for almost a century.

That's the nature of inflation. It doesn't announce itself. It doesn't spike your anxiety the way a stock market drop does. It just works in the background, slowly and relentlessly, reducing the purchasing power of every dollar that sits still.

Three Paths, Three Very Different Outcomes

Imagine placing $100 into one of three vehicles in 1928 and walking away for nearly a century. Here's how each one played out:

Cash under the mattress: Your $100 stayed $100. But by today, its purchasing power eroded to the point where it barely covers what a few dollars bought in 1928. The money didn't move. The world around it did.

U.S. government bonds: Earning roughly 4.5% per year on average, that $100 grew to over $7,700.² Not dramatic. Not exciting. But real, steady growth that meaningfully outpaced inflation over time.

The broad stock market: Earning roughly 10% per year on average, that same $100 grew to almost $1.2 million.² Not because the ride was smooth — it included the Great Depression, World War II, stagflation, the dot-com bust, and the 2008 financial crisis. The returns came despite the turbulence, not in the absence of it.

The gap between doing nothing and staying invested over this period was enormous — the difference between $100 and nearly $1.2 million.

Why "Safe" Doesn't Always Mean What We Think

There's a reason cash feels safe. You can see it. You can count it. It doesn't fluctuate on a screen. In uncertain times, that certainty has real psychological appeal.

But certainty and safety aren't the same thing — at least not over long time horizons. Cash gives you certainty about the number. It gives you no protection at all against what that number can buy.

Government bonds offered a middle ground — real growth, lower volatility, and a meaningful step ahead of inflation. For many investors, that kind of steady progress is an important part of a well-balanced approach.

The stock market, meanwhile, required something different entirely. It required patience through decades when staying invested felt uncomfortable, even reckless. The reward for that patience was extraordinary — but it came with no guarantee along the way.

The Real Variable Wasn't the Investment. It Was Time.

The most striking thing about this data isn't which investment "won." It's how much of the outcome was determined by simply staying in the game.

The broad market didn't deliver roughly 10% per year because every year was good. Some years were terrible. But compounding doesn't need perfect conditions. It just needs time — and the discipline not to interrupt it.

That's the part many people underestimate. The urge to step aside during a downturn, to move to cash when headlines get loud, to wait for things to "settle down" before getting back in — those impulses feel responsible in the moment. But historically, stepping out of the market — even temporarily — has meant missing some of the strongest recovery periods. According to J.P. Morgan Asset Management, missing just the 10 best trading days over a 20-year period could cut total returns roughly in half.³

What This Means for Today

This isn't a recommendation to put everything in stocks or ignore risk entirely. Real life includes taxes, fees, personal goals, and timelines that a hypothetical thought experiment can't capture.

But the core insight holds up: over long periods, one of the most underestimated risks may not be market volatility — it may be avoiding the market altogether.

Time and discipline have historically been two important factors in long-term financial outcomes. Not prediction. Not perfect timing. Not finding the one stock that outperforms everything else.

Just participating. Consistently. Through the noise.

There's no way to know exactly what will happen tomorrow. But you can decide how you prepare for it — and whether your current approach aligns with your long-term goals.

If it's been a while since you've reviewed how your investments line up with where you want to be, that conversation is always worth having.

Sources

1. Bureau of Labor Statistics, 2026 [URL: https://babel.hathitrust.org/cgi/pt?id=uiug.30112046177546&seq=252]
2. Aswath Damodaran, 2026 [URL: https://pages.stern.nyu.edu/~adamodar/] Returns reflect geometric average historical returns from the "Historical Returns on Stocks, Bonds, Real Estate and Gold" dataset, "Returns by year" tab. Stock returns based on S&P 500 including dividends. Bond returns based on U.S. T-Bonds. Growth figures calculated by applying geometric average annual returns to a $100 investment starting in 1928.
3. J.P. Morgan Asset Management, 2024 [URL: https://www.jpmorgan.com/insights/markets/top-market-takeaways/tmt-back-to-school-3-principles-for-your-portfolio]

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