>The use of finance is, at least in theory, it's ability to provide growth to productive sectors. The main distinction is between the primary market (which pro

>The use of finance is, at least in theory, it's ability to provide growth to productive sectors. The main distinction is between the primary market (which provides new funding to companies) and the secondary market (which trades existing securities). You need a certain amount of the latter to support the former by providing liquidity. But anything beyond the required amount starts creating what's known as deadweight losses in economics. Unfortunately, an increasing share of the overall financial sector is the secondary market (mainly proprietary trading operations).