Should banks be diversified or focused? Does diversification indeed lead to enhanced performance and, therefore, greater safety for banks, as traditional portfolio and banking theory would suggest? This paper investigates the link between banks' profitability (ROA) and their portfolio...

The stochastic frontier analysis (Aigner et al., 1977, Meeusen and van de Broeck, 1977) is widely used to estimate individual efficiency scores. The basic idea lies in the introduction of an additive error term consisting of a noise and an inefficiency term. Most often the assumption of a...

The German Commercial Code ("HGB") allows banks to build visible reserves for general banking risks according to section 340g HGB. These "GBR reserves" may, in addition to their risk provisioning function, be used to enhance capital endowment, for internal financing, signaling or earnings...

Developments in risk-transfer instruments and risk management techniques in the last two decades have fundamentally changed how banks manage their assets and liabilities. In this document we show that, for all three sectors of German universal banks (private commercial banks, savings banks, and...

We analyze the dynamics of banks’ regulatory capital ratios. Using monthly data of regulatory capital ratios for a subset of large German banks, we estimate the target level and the adjustment speed of the capital ratio for each bank separately. We find evidence that, first, there exists a...

After decades of steady liberalisation and financial market development, emerging capital markets experienced unparalleled capital inflows in the aftermath of the emerging markets crisis in the 1990s. This paper studies portfolio investment decisions of German banks in 30 emerging capital...

Section 340f of the German Commercial Code allows banks to provision against the special risks inherent to the banking business by building hidden reserves. Beyond risk provisioning, these reserves are implicitly accepted as an earnings management device. By analyzing financial statements of...