Trembling Hand
Can be found on the bid
- Joined
- 10 June 2007
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Having said the above....
When I am designing something I try not to use preconceived ideas. I am distrustful of the statement "everyone knows". To give you some background I currently have a long-term portfolio that is based on blue chip shares from the ASX 200 with over ten years of history. Whilst I do not hold 200 stocks in that portfolio, it is balanced against the ASX200 index - requiring a weighting that you've stated is ridiculous...yet it meets the goals that I have set for that portfolio. It works very well for what I am trying to achieve.
The answer to that question from my perspective is...perhaps. It depends upon the power law and level of return that your strategy operates under. If your system compounds gains, then it only takes very small gains over a ten year period to make it more than worthwhile to expose yourself to a single outsize risk depending upon the frequency of that event. Unfortunately without data it is a moot question.
You've mentioned trading, but what I am seeing is not a "trading" system as I would normally define that. It's kind of a hybrid. You are buying and holding the core portfolio. You are not trading the core portfolio, seeking instead to profit in other means, so the question to me is why are you applying traders rules rather than fund manager rules? Is it of benefit to do so?
Sir O you haven't convinced me in any way.
Counter these points.
Even if i did have backtesting results that remove the survivorship bias of using current weightings. Will the last 10 years be the same as the next 10? Good bet would be no?
That aside the weightings question is really a coin toss. Its just as likely that NCM will outperform BHP. In that case being weighted to the index will be a huge drag rather than benefit. You can in no weigh assume that being heaver into one stock will not benefit or degrade performance. But you can be sure that its skewed your risk.
Therefore unless you have a crystal ball and ensure me that BHP will not buy Xstrata at the next top or NAB buy AMP or a Super Tax on WOW etc etc I'll pass on a coin toss and be happy to reduce portfolio risk. That's my thinking.
The hedging can be fine tuned to the portfolio with a few extra oppies.