Managers' best (and worst) calls of the past 20 years

What has been the best or worst investment theme of the past 20 years?

As Investment Week celebrates its 20th anniversary, fund managers reveal their best and worst investment decisions of the past 20 years, and what they may have done differently.

Stewart Cowley, head of fixed income and macro, Old Mutual Global Investors Beating the crisis When you look back, the calls that give you the most satisfaction are not the ones that were done by grinding through chart books and coming to the right conclusion just a little bit faster than other people.  It has been when you have had a moment of pure enlightenment and you see something that not many other people are seeing. It is like all the pieces of an unknown object you are assembling inside a black velvet bag, in a darkened room, suddenly click together. I have had a couple of t...