Reproduction permitted only if source is stated.ISBN 978-3-95729-1 -(Printversion) Non-technical summary
Research questionThe role of securities trading by banks has assumed significant importance in the modern financial system. Commercial banks today hold a significant amount of securities in their asset portfolio.In the aftermath of the recent financial crisis, there is considerable debate both in academic and policy circles about the implications of security trading by banks' for credit supply and securities markets. A recurrent argument has been that securities trading activities by banks in the crisis have led to a reduction in credit supply. Moreover, there have been several policy initiatives to impose some restrictions on banks' trading activities as there are claims that weak banks take excessive risk through securities trading (Volcker rule in USA, the Liikanen Report in the European Union and the Vickers Report in the UK).However, empirical analysis is scant due to the lack of comprehensive micro datasets.
ContributionIn this paper, we empirically analyze securities trading by banks, and the associated spillovers to the supply of credit to the real sector. We use the German securities' register that contains information on investments made by German banks at the security level as well as the German credit register with information on the credit given by German banks to each firm. The main testable hypothesis, which we examine is that banks with trading expertise will increase their investments in securities during the crisis, especially in those securities that had a (larger) drop in price, to profit from the trading opportunities, thereby withdrawing funds from lending.
ResultsWe find that, during the crisis, banks with trading expertise increase their overall investments in securities, especially in those that had a larger price drop. The quantitative effects are largest for trading banks with higher capital and in securities with lower rating and longer maturity. In fact, there are no differential effects for triple-A securities. Moreover, banks with trading expertise reduce their overall supply of credit in crisis times -i.e., for the same borrower at the same time, trading banks reduce lending relative to other banks. The credit reduction is stronger for trading banks with higher capital and is binding at the firm level. All these differential effects for trading banks are not present outside the crisis period. The use of detailed micro data allows us to control for a number of characteristics that deal with several other interpretations, which makes our results robust. Our results suggest that during a crisis, security-trading activities can crowd out lending. However, at the same time, we also find that banks buy securities that have a larger drop in price, especially in long-term and low rated securities, in turn acting as risk absorbers.
Nichttechnische Zusammenfassung Forschungsfrage
AbstractWe analyze securities trading by banks and the associated spillovers to the supply of credit. Empir...