Bond funds don't have a fixed maturity date, so they can loose value. (thedigeratilife.com)
A target maturity fund invests in bonds with a fixed maturity date. (etfbase.com)
In addition to having a 401 (k) and savings account, you should consider investing in other deposit products, such as certificates of deposit (CDs), which consist of fixed maturity dates and fixed interest rates. (synchronybank.com)