There is a lot of pain still to be had in the equity markets, particularly aimed at the risky end of the spectrum. We think the fair value on the market is about a third lower in the U.S. . .

Profit margins are probably the most mean-reverting series in finance, and if profit margins do not mean-revert, then something has gone badly wrong with capitalism. If high profits do not attract competition, there is something wrong with the system and it is not functioning properly.

Ridiculous as our market volatility might seem to an intelligent Martian, it is our reality and everyone loves to trot out the 'quote' attributed to Keynes (but never documented): 'The market can stay irrational longer than the investor can stay solvent.' For us agents, he might better have said 'The market can stay irrational longer than the client can stay patient.'

Investment bubbles and high animal spirits do not materialize out of thin air. They need extremely favorable economic fundamentals together with free and easy, cheap credit, and they need it for at least two or three years. Importantly, they also need serial pleasant surprises in such critical variables as global GNP growth.

The investment business has taught me – increasingly as the years have passed – that people, especially investors (and, I believe, Americans), prefer good news and wishful thinking to bad news; and that there are always vested interests to offer facile, optimistic alternatives to the bad news.

I believe the only things that really matter in investing are the bubbles and the busts

I find the parallels between how some investors refuse to recognise the trends and our reaction to some of our environmental challenges very powerful. There is an unwillingness to process unpleasant data.