Prudence is knowing that not all swans are white

Printed from: http://www.ft.com/cms/s/aa029756-ec4b-11db-a12e-000b5df10621,Authorised=false.html

Print a single copy of this article for personal use. Contact us if you wish to print more to distribute to others.

© The Financial Times Ltd 2012 FT and ‘Financial Times’ are trademarks of The Financial Times Ltd. Privacy policy | Terms | Copyright