The Transaction Motive:

The principal motive for holding money is to carry out transactions. In general, the transaction demand for money in an economy, MdT, can be written in the following form

Mt = k.T

where T is the total value of (nominal) transactions in the economy over unit period and k is a positive fraction. The number of times a unit of money changes hands during the unit period is called the velocity of circulation of money. In general, equation can be modified in the following way

Mt = kPY

where Y is the real GDP and P is the general price level or the GDP deflator. The above equation tells us that transaction demand for money is positively related to the real income of an economy and also to its average price level.

The Speculative Motive :

An individual may hold her wealth in the form of landed property, bullion, bonds, money, etc. Everyone in the economy will hold their wealth in money balance and if additional money is injected within the economy it will be used up to satiate people’s craving for money balances without increasing the demand for bonds and without further lowering the rate of interest below the floor level. Such situation is called a liquidity trap. The speculative money demand function is infinitely elastic here.