We analyse whether different levels of country ties to Europe among the rating agencies Moody’s, S&P, and Fitch affect the assignment of sovereign credit ratings, using the Eurozone sovereign debt crisis of 2009-2012 as a natural laboratory. We find that Fitch, the rating agency among the "Big...

Bitcoin plunged by 30% on May 19, 2021. We examine the outage the largest crypto exchange Binance experienced during the crash, when it halted trading for retail clients and stopped providing transaction data. We find evidence that Binance back-filled these missing transactions with data that...

Kalibrierung interner Ratingsysteme bei korrelierten Ausfallereignissen In dieser Arbeit vergleichen wir vier verschiedene Testverfahren für die Qualität der Kalibrierung interner Ratingsysteme bei korrelierten Ausfallereignissen. Zwei der Ansätze sind approximativer Natur und die anderen...