17.     STOCK
1.      Meaning
Stock refers to entire quantity of a commodity which is in the custody of the seller. So it is the potential supply.

2.      Dependence
Stock depends on production.

3.      Relationship
Stock can be greater than the supply.
(a) For perishable commodities the stock and the supply can be the same.
(b) For durables commodities, the stock can be more than the supply.

4.      Order of existence
Stock comes before supply

Supply refers to the quantity of a commodity offered for sale at a given price and at a given time and place.

Supply depends on stock and price.

Supply cannot be greater than the stock.
(a)    Supply is either equal or less than the stock.

Supply follow stock there cannot be supply without stock.