Set forth below is the text of a comment that I recently posted to the discussion thread for another blog entry at this site:
A person would have to be drunk to believe in VII.
I don’t think so, Anonymous.
I think it is common sense.
In every other market that exists, we all practice price discipline. I have never heard anyone question that that is the right thing to do. So it’s simple and non-controversial.
When it comes to stock investing, the way we practice price discipline is by engaging in market timing. Shiller showed that the value proposition of stocks varies depending on the valuation level that applies. So the common-sense thing to do is to vary your stock allocation in response to big shifts in valuations so that your risk profile is roughly constant over time, That’s Valuation-Informed Indexing! That’s the entire deal. That’s the concept. You take Buy-and-Hold, which is wonderful in many ways, and you incorporate market timing into the mix and you have Valuation-Informed Indexing. Now you’ve really got something that works!
But there’s controversy.
Huh? What the f? Where does this controversy stuff come from? Why is there even one person in the world who feels so opposed to the idea of practicing price discipline when buying stocks that he would say that someone would have to be drunk to believe in Valuation-Informed Indexing?
It’s because we did not always have Shiller’s Nobel-prize-winning research available to us. Buy-and-Hold was developed in the 1960s. Shiller did not publish his “revolutionary’ (his word) research findings until 1981. Had Shiller published in 1961, there never would have been a Buy-and-Hold. It would have been Valuation-Informed Indexing all along. It’s possible that we would have called it Buy-and-Hold. But the thing that we would have come up with if we had had Shiller’s research available to us at the time would have called for market timing (the long-term variety, obviously) by all investors. And there would have been no controversy attached to it. We all want the same things. We all want to be able to invest effectively. So we all would have went with what made sense and with what the research supported. Easy, peasey.
The problem was this thing called the Efficient Market Theory. There was never any research supporting the Efficient Market Theory. It was just an assumption. Economists thought that it made sense that investors would act rationally in pursuit of their own self-interest, which is to get prices right. And it does make sense so long as you ignore the fact that humans are highly emotional creatures. Given that Shiller’s research was not available to us, a lot of us came to believe that this Efficient Market Theory thing was real. If the Efficient Market Theory were real, market timing would be a mistake and Buy-and-Hold would be the ideal strategy. So we went with that.
Then Shiller came along and blew it all up.
And the Buy-and-Holders — did nothing. They didn’t change their strategy to reflect what we learned from this “revolutionary” (Shiller’s word) research. They just acted as if nothing had happened. They just kept rolling along.
And here we are. It’s now 50 times harder to acknowledge that market timing is always required as it would have been to acknowledge that in 1981. It looks bad to have engaged in a 39-year cover-up. But we cannot move backwards in time. We are where we are. There has been a 39-year cover-up and as a society we need to come to terms with it.
The idea that market timing is 100 percent required for every investor makes perfect sense. There shouldn’t be anything even a tiny bit controversial about it. The controversy comes from the unfortunate reality that we once didn’t know everything there is to know about stock investing and so we made a mistake and now it hurts to say those words “I” and “Was” and “Wrong.” But the idea that market timing (price discipline!) is required is the future and we are going to have to learn how to say those words sooner or later. So we are all better off just doing it now and moving on to a better future as soon as possible.
I think it is the idea that it is not necessary to practice price discipline when buying stocks that is evidence of drunkenness, Anonymous. I think that the idea that market timing is always required is just common sense. And the fact that 39 years of peer-reviewed research supports it is just icing on the cake.
I naturally wish you all the best of luck with whatever investment strategies you elect to follow, in any event.
Common-Sense Rob


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