A rentier is an investor whose relationship to a company or enterprise is strictly limited to the ownership of financial wealth (such as stocks or bonds) and the receipt of income on that wealth (such as dividends or interest). The financial system performs dismally at its advertised task, that of efficiently directing society's savings towards their optimal investment pursuits. The system is stupefyingly expensive, gives terrible signals for the allocation of capital, and has surprisingly little to do with real investment.