Yes, HSA funds can be invested in a variety of options, such as mutual funds, stocks, and bonds, depending on the HSA provider. Investing HSA funds allows the account to potentially grow over time through investment earnings, which can be used for future medical expenses or in retirement. Investment earnings in an HSA are tax-free, providing a significant tax advantage compared to traditional investment accounts. However, it’s important to consider your investment time horizon and risk tolerance when investing HSA funds, as there is potential for investment losses.