In the case of the D-Mark it was certainly the profound confidence of market participants in the stability of the German currency that established is as the second most important reserve and investment currency after the US dollar.
CRILC provides a timely window on any degradation of credit of a large borrower at a bank to the central bank and to other banks having the same entity as a borrower. The Asset Quality Review (AQR) that followed in 2015 relied heavily on CRILC data to cleanse the Augean stables of massive and unrecognised non-performing assets (NPAs) that have saddled our banks.