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🚨 Vanguard just dropped a bomb on Wall Street. They now expect the S&P 500 to return just 3.8%–5.8% a year over the next decade. Adjust for inflation, and that’s a real return of just 1–3%. (Save this thread)
If you’re not familiar: Vanguard is one of the largest asset managers on Earth managing over $10 trillion for investors around the world. They pioneered index funds and serve millions of long-term investors, retirement accounts, and institutions. When they talk, markets listen.
For decades, investors have believed the stock market delivers 8–10% returns like clockwork. That’s based on historical averages but averages don’t predict the future especially when the market is this expensive. Vanguard thinks the next 10 years will look very different.
Why so bearish? Because stock prices have surged far beyond fundamentals. Vanguard estimates U.S. equities are now trading 44% above their fair value meaning investors are overpaying relative to long-term earnings and economic reality.
Let’s define “fair value.” Vanguard’s model looks at stock prices relative to inflation-adjusted average earnings over the past 10 years, a metric similar to the Shiller P/E ratio. This smooths out temporary profit spikes and gives a long-term perspective. Right now? Overvalued.
When prices rise faster than earnings, valuations inflate. Valuation is how much you pay for each $1 of company earnings. The higher it is, the harder it is to earn strong future returns unless earnings grow rapidly or prices fall. Neither is likely in today’s market.
So what does Vanguard actually forecast? • U.S. equities: 3.8%–5.8% • Emerging markets: 3.3%–5.3% • U.S. Treasuries: 4.0%–5.0% Yes, government bonds may beat stocks over the next decade and that hasn’t happened in years.
Let’s define that further: These are nominal returns meaning they don’t account for inflation. To calculate real return, you subtract inflation from nominal. So if you earn 4% and inflation is 2.5%, your real return is 1.5%. That’s what matters for your purchasing power.
And inflation is no small thing. Vanguard’s forecasts assume inflation averages 2% to 2.5%. But if it runs hotter say 3% your real return on stocks could be close to zero. Meaning your investments won’t keep up with rising prices.
So how does Vanguard build these forecasts? They use something called the Vanguard Capital Markets Model® (VCMM). It’s a Monte Carlo simulation that runs 10,000 scenarios, using data from 1960 onward to predict possible outcomes based on macro trends and risk factors.
What’s a Monte Carlo simulation? It’s a method that runs thousands of randomized “what-if” scenarios changing interest rates, inflation, GDP, and more to estimate the distribution of possible returns. Not a guess, not a single forecast, a statistical universe.
And in that universe, stocks look weak. Why? Because in addition to high valuations, there’s a new competitor: bonds. For the first time in a decade, fixed income offers compelling returns with much less risk.
Let’s define fixed income. “Fixed income” refers to assets like bonds that pay predictable interest. When yields were near 0%, nobody cared. But now? • U.S. Treasuries: 4.0%–5.0% • Aggregate bonds: ~4.5% • TIPS (inflation-protected bonds): ~4.2% These are back.
And that return gap is vanishing. In April, Vanguard’s model said U.S. equities would beat bonds by 0.9% per year. Now? That difference is just 0.1%. You’re taking all the risk of stocks for almost no reward premium over bonds.
Another shift: value stocks. Vanguard expects U.S. value stocks companies with low price-to-book ratios to return 6.3% to 8.3% annually. That’s well above the broader market. Why? Because they’re cheaper, and starting valuation still matters.
What’s a price-to-book ratio? It compares a company’s stock price to the book value (assets minus liabilities) on its balance sheet. Low price-to-book = value. High = growth. Value stocks are often unloved, but historically offer better long-term returns.
So what does all this mean? Here’s the simplified playbook: • Don’t expect 10%+ returns from U.S. stocks • Diversify beyond large-cap growth • Consider value stocks, Treasuries, and REITs • Pay attention to real (inflation-adjusted) returns • Lower your long-term assumptions
This isn’t short-term market timing. Vanguard is crystal clear: valuations don’t predict 1-year moves. But over 10–30 years, starting valuations are one of the strongest predictors of your return. And right now, valuations are screaming “caution.”
And remember: these forecasts aren’t guarantees. They show a range of possible outcomes, based on today’s conditions. Things can change fast but if you’re building a long-term plan, you can’t ignore them. Better to be realistic than shocked.
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