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Grantham's Outlook for stocks

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6:56 am
December 6, 2011


somrh

Member

posts 336

3

As for other literature, I'm not sure. I know most of their research is proprietary. They seem to think that bubbles follow predictable patterns. They have pretty charts to corroborate that. I'm always skeptical of pretty charts though (I tend to want to know what ad hoc assumptions had to be made in order to make the chart look so damned pretty.)

I may start playing with the S&P 500 data to see if I can reproduce something along the lines of what they have. The key is trying to figure out how they determine their "historical trend".

There is another interesting piece of research that doesn't make any predictions but does model the "ebb and flo" as they talk about in the portion you quoted:

Bubbling and Crashing Exchange Rates, Grimaldi and De Grauwe

They look at foreign exchanges markets in particular. Instead of the assumptions of EMH (that all people have all available information and make the same sorts of definite infererences from tha tinformation) they assume that there are two types of people (what they call fundamentalists and chartists) and they assume that they use past results to predict how variables will effect future outcomes (so inferences change over time).

Their basic model gives all sorts of bubbles and busts. There are other interesting aspects as well, IIRC.

I think part of the difficulty is actually determining what is, in fact, a "bubble". Folks like Fama are skeptical that there are such things or that they can even be adequately defined. In spite of the fact that I don't share his paradigm, I appreciate the difficulty in defining the term. I'm not too fond of Grantham's characterization (deviation from the trend) but he does seem capable of good predictions so from a purely instrumental perspective, I have sympathy.

It's certainly a fascinating area of research. I hope new insights continue to emerge in research.

5:10 pm
December 5, 2011


Graeme

Austin, Texas

Member

posts 183

2

Some doom and gloom for sure. I remember reading his "7 year famine" prediction when he said it a few years ago and it has always stuck with me. I'm definitely in a "raising capital" mentality for the next few years and trying to get every spare penny put away for the purchase of undervalued assets in the future. Even the spare money I get tutoring grade 8 math gets put in an envelope for investment down the line.  

 

A really interesting observation about the hyper-depressed market and all these big losses followed by rallies after the hysteria calms:

 

Yet the S&P 500, unlike other global equities, has hung in and staged rallies whenever the bad news has eased.  
Why?  Well, 15 years ago, Ben Inker and I designed a model to explain (not predict) the ebbs and fl ows of the 
P/E ratio.  It had a surprisingly high explanatory power.  We found that everything that made investors feel 
comfortable worked.  That is to say, it was a behavioral model.  Fundamentals like growth rates did not work.  
The two (out of three) most important drivers were profi t margins and infl ation.  Well, today we have (remarkably, 
even weirdly) record profi t margins.  And by historical standards, stable and low infl ation.  Because of this, the 
P/E level that one would normally expect to have in these conditions has been way in the top 5% since 1925, 
but today’s market (not to mention the lows of September) is well below the explained level.  It’s depressed by 
a very obvious reason: the cloud of negatives, which generally and surprisingly have historically had very little 
effect individually on the market, but apparently do depress “comfort” when gathered into an army of negatives.  
So, whenever the negative news cools down for a week or so, the market tries to get back to its “normal” level, 
which is about 20% higher.  
Yet the S&P 500, unlike other global equities, has hung in and staged rallies whenever the bad news has eased.  Why?  Well, 15 years ago, Ben Inker and I designed a model to explain (not predict) the ebbs and fl ows of the P/E ratio.  It had a surprisingly high explanatory power.  We found that everything that made investors feel comfortable worked.  That is to say, it was a behavioral model.  Fundamentals like growth rates did not work.  The two (out of three) most important drivers were profi t margins and infl ation.  Well, today we have (remarkably, even weirdly) record profi t margins.  And by historical standards, stable and low infl ation.  Because of this, the P/E level that one would normally expect to have in these conditions has been way in the top 5% since 1925, but today’s market (not to mention the lows of September) is well below the explained level.  It’s depressed by a very obvious reason: the cloud of negatives, which generally and surprisingly have historically had very little effect individually on the market, but apparently do depress “comfort” when gathered into an army of negatives.  So, whenever the negative news cools down for a week or so, the market tries to get back to its “normal” level, which is about 20% higher. 
The other interesting part is his "no market for young men" thesis. He remarks about how the two bigger busts of the Greenspan era weren't allowed to run their natural course. Anyone know of any literature out there that talks about what happens to subsequent bubbles when previous bubbles aren't allowed to naturally burst? 

 

2:15 pm
December 5, 2011


somrh

Member

posts 336

1

Jeremy Grantham Releases The Scariest Market Forecast Yet

Zerohedge posted the entire pdf to the post. It's only 4 pages. His predictions aren't optimistic to say the least.

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