No
Treasury bills are a type of bond issued by the national finance to make up for imbalances in balance of payments or monetary policy. There is basically no risk of default. A type of treasury bond, treasury bills are in bearer form and can be transferred and circulated without endorsement.
Funds generally refer to securities investment funds, such as a financial product that is initiated and raised by securities companies for investment and financial management needs and then invested in different types and directions in order to obtain returns. For example: Bond funds (or even other types of funds) will invest in products such as treasury bonds, treasury bills being one of them. Closed-end funds cannot be subscribed or redeemed during the closed period.