Economic concerns have plagued investors throughout the year, and the stock market has tumbled as a result. The S&P 500 has fallen 21% from its high, and the Nasdaq Composite is down 32%, putting both indexes in a bear market. But that chaos comes with a silver lining for patient investors.

Software giants Salesforce (NYSE: CRM) and Adobe (NASDAQ: ADBE) have seen their share prices plunge 48% and 54%, respectively. Neither stock has suffered a greater loss at any point in the past 10 years, meaning investors now have a once-in-a-decade buying opportunity.

Here's what you should know.

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Source Fool.com