Martin Wolf on how much capital banks should be required to hold:
The new regulatory regime is an astonishingly complex response to the failures of this model. But “keep it simple, stupid” is as good a rule in regulation as it is in life. The sensible solution seems clear: force banks to fund themselves with equity to a far greater extent than they do today.
So how much capital would do? A great deal more than the 3 per cent ratio being discussed in Basel is the answer. As Anat Admati and Martin Hellwig argue in their important book, The Bankers’ New Clothes, significantly higher capital – with true leverage certainly no greater than 10 to one and, ideally, lower still – would bring important advantages: it would limit the implicit subsidy to banks, particularly “too big to fail” ones; it would reduce the need for such intrusive and complex regulation; and it would lower the likelihood of panics.
An important feature of higher capital requirements is that these should not be based on risk-weighting. In the event, the risk weights used before the crisis proved extraordinarily fallible, indeed grossly misleading…..
There is no magic in the number of 10 times leverage (or 10% Tier 1 Capital to Total Assets) but the larger the buffer, the greater the protection against fluctuations in asset values. The Basel III minimum leverage ratio of 3% is too low to offer adequate protection, even with the highest quality assets, and while 10% is not readily attainable in the short-term, it makes a suitable long-term target.
Read more at Financial reform: Call to arms – FT.com.