The price at which a government or the authorities managing a commodity agreement agree to purchase or sell stocks to maintain a particular price Investment - Investment is the purchase of capital equipment. Replacement investment - this is where companies buy new machinery and equipment that simply replaces something they had already that was worn out or inefficient. Depreciation is often used as an approximation for this. Net investment - this is where companies buy new machinery or equipment. It is this type of investment that actually adds to the capital stock of the economy.
Investment can also refer to changes in the level of stocks.
Invisible balance - The difference between a country's income and expenditure on services such as tourism and banking together with profits earned and interest payments received from overseas.