Financial traffic jams are also caused by financial Global Positioning System

Sir we are grateful to Christopher Caldwell for drawing our attention to "Traffic" by Tom Vanderbilt, "Caught in the human traffic", August 23. From what we see that book should urgently be made obligatory reading to all bank regulators in Basel, so that they learn what happens when you impose credit rating agencies as the Global Positioning System supposed to direct the financial flows of the world.

That "Predictions about traffic become 'self-destroying'" is exactly what lies behind that systemic risk that brought us the subprime mess. They should have known it!

"Once everyone gets the same reliable real-time information about traffic everyone mobs the same route" questions the whole underpinnings of our current bank regulations, namely that you are able to measure risks without affecting the risks.

When the book quotes German physicist Michael Schreckenberg "telling them the whole truth is not the best way" we begin to understand Angela Merkel's request for a purely European credit rating agency.