While much attention has been focused on the optimal ratio of a firm's debt to equity, the "optimal" or best balance between bond financing and (longer-term) bank financing has scarcely been addressed. This essay examines the principal differences between an economy with a well-developed corporate bond market free from government interference and an economy in which bank financing plays a central role (as in East Asia). When a full-fledged corporate bond market is present, market forces have a much greater opportunity to assert themselves, thereby reducing systemic risk and the probability of a crisis. This is because such an environment is associated with greater accounting transparency, a large community of financial analysts, respected rating agencies, a wide range of corporate debt securities and derivatives demanding sophisticated credit analysis, and efficient procedures for corporate reorganization and liquidation. In addition, the richness of available securities will tend to enhance economic welfare, and the market forces at work on the wide array of bond prices are likely to have a strong spillover effect on the health of the banking system as well.