What are the examples of stock variable and flow variable?

Answer 1

A stock variable measures a variable at a specific point in time, for example the amount of foreign direct investment at the moment in a specific country. This variable is only denominated in terms of a currency. A flow variable on the other hand looks at the measure of a variable over a period of time, for example the GDP of a country as this variable looks not only at a fiscal amount but also also a time amount (in this case the amount of money spent in the economy over the course of a year).