You may be wondering what theories there could be about cash! We all know what cash is, and the more of it we have the better - or is it?? What we have to remember about cash is that it has an opportunity cost . If a firm holds too much cash in the bank, then that money is not working for it as hard as it could be. So in the same way that too little cash may be a problem, too much also has negative implications. There are various aspects to the firms cash management:- Liquidity Investment Cash flow Liquidity The firm has to ensure that it has sufficient cash for all its day-to-day activities. It needs to be able to pay its bills when they are due and pay its staff and so on. It therefore needs to have sufficient of its cash in a liquid form to cope with all contingencies. However, the more liquid a form the cash is in the less it will be earning for the firm. You could check this by trying to compare the rates that a bank or building soci...