Online high-yield savings accounts: Some of the best yields you’ll get on savings that you’ll need quick access to (e.g., for emergencies, an upcoming trip or a down payment) can be had in FDIC-insured online high-yield savings accounts. Money market funds and deposit accounts: A money market mutual fund invests in highly liquid, low-risk, short-term debt instruments. The average 7-day yield on money market funds was 3.50% on Wednesday, according to Crane Data. By contrast, your bank may offer a money market deposit account, which is FDIC insured. Some of the highest rates available on money market deposit accounts come from online bank offerings.