Some forms of money are easier to spend than othersthey are more liquid, economists say. Money in your - account is a little more liquid than money in a bank - account. Some small-denomination time deposits (CDs) charge a penalty for early withdrawal. This makes money in a CD - liquid than money in savings or checking that can be withdrawn using an ATM. The money supply measure - comprises the most liquid forms of money. morecheckingM1savingslessM2