Sir FT, do you, or our dear The Undercover Economist Tim Harford, have an explanation for what is a monstrous regulatory mistake?

Sir, I refer to Tim Harford’s “The Changing Face of Economics” December 19.

As an economist, if I were to regulate or supervise banks, I would mostly be concerned with bankers not perceiving the credit risk correctly. Wouldn’t you?

That’s why I cannot understand why so many economist colleagues, when acting as bank regulators, can be so dumb so as to bet our banking systems on that bankers will be able to perceive what is safe correctly. 

Let me explain it having bankers answering the four possible outcomes.

If the ex ante risky, ex post turns out safe = “Great News we helped an entrepreneur to have success”

If the ex ante risky, ex post turns out safe = “You see, that is why we lend them little and charge them high risk adjusted interest rates.”

If the ex ante safe, ex post turns out safe = “Just as we expected”

If the ex ante safe, ex post turns out risky = “Holy moly what do we now do? We lend it way too much at way too low interest rates”

But the regulators in the Basel Committee, in their Basel II of 2004, assigned risk weights of only 20% for what is so dangerous to our bank systems as what human fallible credit rating agencies have rated AAA, and a whopping 150% for what has been made so innocous, by being rated below BB-?

Sir, so do you, or our dear The Undercover Economist Tim Harford, have an explanation for what is clearly a monstrous regulatory mistake? 

Or is it that you, and our dear The Undercover Economist Tim Harford, out of sheer collegiality solidarity, both agree with such dumb regulations?

If so, let me assure you that when I studied economics, it was to learn and understand economics, not to join an economists’ union/mutual admiration club.

http://perkurowski.blogspot.com/2016/04/here-are-17-reasons-for-why-i-believe.html

PS Tweet: I can understand a child believing that what’s rated below BB- is more dangerous to our bank systems than what’s rated AAA, and therefore assigning a bank capital requirement of 12% to the BB- rated assets, and only 1.6% to those rated AAA. But mature professionals?

@PerKurowski