‘Pre-Crisis Framework’
“The deficiencies in the pre-crisis framework included an inadequate definition of the regulatory boundary between the banking book and trading book, which proved to be a key source of weakness in the design of the trading-book regime,” the committee said. In addition, “the models-based capital framework for market risk relied (and still relies) heavily on risk drivers determined by banks, which has not always led to sufficient capital for the banking system as a whole.”
The Basel group completed the market-risk rules after four impact studies over two years. The final study was based on end-June 2015 data. Compared with existing rules, the new framework “is likely to result in an approximate median (weighted average) increase of 22 percent (40 percent) in total market-risk capital requirements,” including securitization and non-securitization exposures, the regulator said.
The review is part of a broader project to limit the use of banks’ own models for calculating their capital needs. The regulator is giving standardized models greater importance compared with internal models, while at
the same time prescribing internal models in more detail than before.