I know, I know, I am one of the little non-believers of this religion here.
I think there are many ways to construct an average and that more than say 50-100 investments do not help reduce risk. They add risk, the risk of missing opportunities. They add to that risk because of the weighting of components. Components that have growth in the past are over represented while components having it in the future are under represented. Too much diversification and done the wrong way. More important than anything in the stock market is sector diversification and many indices do not even consider that.
Now DALBAR publishes a report on how individual investors do compared with “passive” ETF investors. I thought the result would be clearly for ETF investors, but it seems that those times are gone. individual investors did beat “passive” ETF investors, again. And even worse, individual investors were more passive than ETF managers, doing less trading and holding for longer periods of time.
Now, this is an average I trust more. Real numbers that average investors did make, not some self-constructed average with different weighting of the components.
We already established that there are more indices and more ETF than single stocks today. That is just another sign of a bubble in my humble opinion.
I think the DALBAR average may be biased too, because I suppose it includes some big investors that do good and many little investors that do not. Maybe a median calculation would be much worse.
The risk of missing opportunities (ROMO, my own construction) is the risk of missed opportunities in the future, while the FOMO is a bias that comes after the fact and makes you run after performance too late. If you have thousands of components in your ETF and even worse, if they are weighted as most indices do, you risk missing that big winner. Not because you don’t own it but because you own too little of it.
The other bad thing in owning thousands of stocks is the inclusion of companies you would not touch with gloves if you were choosing yourself. Zombies, debt-loaded, badly managed companies, cheaters that are just a burden and nothing more.
Now, the good thing is, and I understand that, that you need no knowledge. You avoid costly errors (others do those errors for you). And you don’t need to learn or spend time with your investments.
But is it really that bad to learn and spend some time with investing your hardly earned money? I don’t think so.
So, that was a con agains the holy grail. Looking forward to some pros.
The DALBAR study: