Investors are beginning to get nervous about the stock market.

Nearly 45% of investors expect stock prices to fall in the next six months, according to a poll from the American Association of Individual Investors published in late August 2026, while only around 33% believe the market will continue climbing.

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Major market indexes have also stagnated in recent months. After years of record-breaking gains, the S&P 500 (SNPINDEX: ^GSPC) is up by just 2% over the last three months, while the tech-heavy Nasdaq Composite (NASDAQINDEX: ^IXIC) has fallen by 2% in that time.

There's no way to predict the market's short-term future, but a bear market is coming eventually. Hypothetically, if the market were to crash tomorrow, history says this is the smartest move investors can make right now.

The move that will protect your portfolio against a market crash

The single most effective way to protect your investments is to ensure you own a well-diversified portfolio full of stocks with robust fundamentals.

Stock price alone can't predict how well a company will fare during a bear market. Some stocks are fueled primarily by hype, driving up their price while the companies themselves sit on shaky foundations. When a recession hits, those foundations may not be strong enough to weather economic volatility.

The dot-com bubble is perhaps the clearest example of this. Tech stocks exploded in value in the late 1990s, with the S&P 500 surging by nearly 200% between 1995 and 1999 alone. Yet many of these companies had unsustainable business models, lacked a clear competitive advantage, or were poorly managed.

When the bubble popped, hundreds of stocks crumbled under the weight of a bear market. The Nasdaq lost nearly 80% of its value between 2000 and 2002, and countless stocks crashed hard and never recovered.

Healthy stocks, though, are far more likely to recover from volatility. Companies like Amazon, Apple, and Microsoft were all hit hard during the dot-com bubble. However, because they had strong competitive advantages and solid foundations, they not only recovered, but became industry-leading behemoths.

Is it safe to invest in the stock market right now?

With a surge in AI spending renewing concerns about a bubble, it can be tempting to avoid investing altogether. But history suggests it's actually safer to continue investing despite the potential for short-term volatility.