It seems Barton Biggs, the former chief investment strategist for Morgan Stanley who has been off running a hedge fund for the past two years, is about to become the Samuel Pepys of the investing world.

Biggs has been quietly writing a tell-all diary of his investing adventures that is likely to put a few noses out of joint and also - since he uses only first names and has occasionally changed even those names - will keep a lot of people guessing.