Natural Factors:

Seasonal variations may affect the demand for a commodity at certain times of the year. For example, during the raining season, demand for jackets, raincoats and umbrellas will increase while during the dry season, demand for commodities such as fans and air conditioners will rise.

Availability of credit:

When consumers are given credit facilities in the form of credit purchases, hire purchases and the use of credit cards and cheques, they are encouraged to buy more goods. Granting of credit facilities will increase demand for goods covered by these facilities, all things being equal.

Cost of borrowing (Interest rate):

If the cost of borrowing is low (lower interest rates) then people can borrow and consume more of normal goods and services. If cost of borrowing is high then people can borrow less and the investment reduces.