Step 1: Define Demat shares.
'Demat' is short for dematerialization, which is the process of converting physical share certificates into an electronic format. These electronic shares are held in a demat account.
Step 2: Define fungibility.
Fungibility is the property of a good or a commodity whose individual units are essentially interchangeable. For example, one kilogram of gold is identical to any other kilogram of gold.
Step 3: Apply the concept to Demat shares.
In a demat account, shares of a particular company are not identified by distinct certificate numbers as they were in physical form. One equity share of a company is identical to and interchangeable with any other equity share of the same company. This makes them fungible.