You can use your HSA to invest tax-free funds for tax-free growth, but it's helpful to understand how your investing and cash funds actually work.

When you purchase an ETF, mutual fund, or stock, you're making a purchase in the stock market. As that investment increases or decreases in value, your investment balance changes to reflect the growth or loss.

To spend investment balance funds, you'll need to sell the amount you want first. Allow up to three business days for the sale to complete and the funds to move into your cash balance.

Your investment balance updates at the close of the most recent market day.

Your cash balance reflects HSA funds available for spending on health expenses right now.

Your total HSA balance combines your cash and investment balances. To see both, along with your total, check your account information in your Health Wallet.