How to interpret a surprise index

Printed from: http://www.ft.com/cms/s/1c75c80c-20f0-11e1-8a43-00144feabdc0,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