The main difference between a fixed deposit and treasury bills lies in the issuer, risk level, liquidity, and return structure.

A fixed deposit (FD) is a savings instrument offered by banks and financial institutions. Investors deposit a lump sum for a fixed period at a predetermined interest rate. The interest can be paid periodically or at maturity. FDs are considered relatively safe, especially when placed with reputable banks, but they still carry some bank-related risk. They are suitable for conservative investors seeking stable and predictable returns. However, premature withdrawal may attract penalties, reducing overall returns.

Treasury bills (T-bills), on the other hand, are short-term government securities issued by a country’s central government to meet short-term funding needs. For example, in the United States, they are issued by the U.S. Department of the Treasury. T-bills are typically issued at a discount to their face value and redeemed at full value at maturity, with the difference representing the investor’s return. They are considered one of the safest investments because they are backed by the government.

In terms of liquidity, T-bills are generally more liquid since they can be traded in secondary markets before maturity. Fixed deposits are less flexible due to penalties for early withdrawal.

In summary, fixed deposits are bank-based, fixed-interest savings products, while Treasury bills are government-backed, short-term securities offering high safety and market liquidity.