What determines the composition of a firm's cash reserves?

We investigate what determines variation in the composition of the financial assets that constitute corporate cash reserves and how this variation relates to other key liquidity management practices. The degree to which a firm invests its cash reserves in less liquid, longer-maturity financial assets that earn a higher yield is explained by financial constraints, the ability to accurately forecast short-term liquidity needs, and the firm's likelihood of defaulting on its debt. During years when a firm's cash reserves are required to fund increases in investment or operating expenses the firm transfers funds from less liquid to more liquid financial assets. A firm's decisions relating to the composition of its cash reserves interacts with other key liquidity management practices, such as relying on credit lines for liquidity, extending trade credit or using it as a source of financing, and holding large amounts of inventories. Our findings provide insights on an important component of corporate liquidity management decisions.