Just catching up on this thread; I've been busy defending common sense against an onslaught from bitcoin barbarians, whilst you guys have been enjoying yourselves
I remember the original article and was tempted to exchange some of my Prize Bonds for Renishaw. Alas my risk aversion is of the chronic variety, but I do sleep nights.
I think I go along with the argument that Colm was "lucky" to beat the market with a concentrated portfolio. I also think Warren Buffet was lucky.
This discussion would have had a very different colour in 2010. Though I am persuaded by one of Colm's favourite themes - the Bernanke Put Option, one that he highlighted again in his thought provoking presentation to the Society of Actuaries on DC pensions.
Here's the way the argument goes. I think if the markets had been left to run their course during the crisis we would possibly have had a meltdown which would have knocked us back to the Stone Age. The financial models do allow for the possibility of such a meltdown. But what happened is that the powers that be (I'm with TheBigShort on this) pulled out all the stops to save the situation. Most notable and enduring of all is QE. There can be little doubt that QE is behind the strong recovery in stock markets in recent years. I'm not saying that is a bad thing but it does seem that the stock holding classes (which includes workers' pension funds) have a sort of buyer of last resort in the central management of our economies. So whilst I myself will remain mostly in "safe" assets, I think over the medium term there are systemic reasons for believing equities will out perform.
What little part of my portfolio (an ARF) is invested in equities I chose one of those funds which purported to invest in, I think, only 20 stocks. I sort of felt that I should take a slight "punt" if I was putting my toe in the water. I didn't track it very closely but I don't think it significantly outperformed a fully diversified approach, at least certainly not to the extent of Colm's portfolio.
I did actually once try picking my own 10 stocks as per Brendan's advice. The volatility kept me awake and glued to Bloomberg and within a matter of weeks I threw in the towel.
I think the following quote from
fella needs a clarification.
...if you only hold a small number of stocks i’d expect you to beat the market that’s kinda obvious but your been rewarded for taken extra risk ...
Modern Portfolio Theory argues the opposite. You get rewarded for overall stockmarket risk but you do not get rewarded for concentration risk. The reason being that the latter can be avoided whilst the former cannot. But I think he meant that Colm was lucky which, as I said, I think I agree with.