Wikinvest Wire

Tuesday, September 21, 2010

More Not So Deep Thoughts

Yesterday right before the close Maria asked a guest why the market was up yesterday. Based on his answer I don't think he was expecting the question. This lead me to a new thought on a Talebesque concept brought up in past posts. Taleb has noted that people like there to be explanations for things that happen. This is called fallacies of explanation. I'm sure that this is not new ground for you but we feel better if an event or occurrence can be explained.

The idea behind the fallacy of explanation is that for many things that happen there really is no explanation. This is very true for day to day movements of the stock market. If you look at articles before the open you might see something like futures are down due to growth concerns in Europe. If you look at articles recapping the day from after the close you might see something like equities rose over optimism for earnings.

I buy into the idea about explanations being mostly a psychological thing but the new thought is that one determining factor for success is being able to tell when the explanation actually is important versus the majority of the time when it isn't; more specifically having a good internal filter for sorting out news from noise. Even if most explanations/news doesn't matter some does and being able to understand this could be huge, I think it is anyway.

The best example of this I can come up with might be my experience with Bank Of America (BAC). I bought it years ago with the expectation of holding it forever. Being one of the largest American companies (by market cap) there is a lot of news on it every day most of which is meaningless. For the last few years the market has cared less about analysts raising or lowering estimates or changing ratings than it used to. Sometimes the market does care but in general I believe there is less regard for this sort of news. If you are a long term holder of a stock like Bank Of America it is unlikely that some analyst moving a full year earnings target by ten or 20 cents in either direction would serve as much of a catalyst for action. But the stock is covered by everyone (intentionally vague hyperbole) and it is their job (presumably) to call 'em as they see 'em which creates a lot of noise as opposed to news.

Occasionally news is very important; a ringing bell so to speak as was the case with BAC's announced takeover of Merrill Lynch after Lehman Brothers died but before the market opened and stocks could react (here there was a real explanation). I sold right away at about $29, the stock went to $37 a week or two later and then imploded along with the rest of the sector, well the ones that didn't literally go to zero. This news is as close to a bell ringing as I have ever experienced as an investment manager and candidly I'm not sure I would have known to sell had they waited a few hours and announced they were buying for a third of what they ended up paying so understanding this news for what it was--important and a catalyst for action was about two things; luck and being aware enough to understand that in the noise there is real news now and then.

I would be very surprised if something is ever that obvious to me again; that strikes me as a once in a career type blunder to capitalize on.

Another not so deep thought came to me yesterday afternoon. As some readers may know I go to the gym when the stock market closes for the day (commit yourself to fitness, don't drink soda LOL). The first thing I do at the gym most of the time is a turn on the StairMaster machine. Our gym has two StairMasters and the vast, vast majority of the time one of them is available for me to use. Yesterday I got to the gym and saw only four vehicles in the parking lot. Sweet, the StairMaster won't be an issue! Sure enough both of them were occupied and I felt sort of silly, on the inside, for the assumption I made and immediately tied the behavior in with the complacency that investors often have like forgetting after several up years that markets can go down a lot. That both StairMasters were being used was almost a personal black swan.

9 comments:

Anonymous said...

If we go below the 200 dma you have sold

Now we go above the 200 dma and you are silent.

Are you being biased and negative towards the downside? I expect a pull back here in a day or two also, but are you letting your bias replace your rules?

Nasdaq and dow charts look even better. The fall looks good to me.

Roger Nusbaum said...

um yeah, I disclosed a while back that I would probably wait for the 50 day to crossover the 200 day to try to minimize the trading around this.

as far as biased to the downside; written about that many times. the downside hurts our clients but the upside does not.

if you're going to leave a comment with a snarky tone maybe you should read a little more thoroughly.

Anonymous said...

well i missed the 50 vs 200 cross over comment.

difficult questions are useful in my opinion. I try to question myself the same way. Not quite sure how and when i crossed over from difficult/probing to snarky, but i did notice a difference in your rules which i questioned and you explained.

Anonymous said...

Filtering the real news from the noise is very important and deep(IMHO).
Thanks,
Jeff from Milan, Italy

schtoonkmeyer said...

good post - i get some calls from clients as to why the market or stocks did this or that today. and like you, i think most of it is random noise.

a question - at the top of the post you mentin maria as if we should know who she is - well who is she and why did you quote her?

thanks

Roger Nusbaum said...

Bartiromo

Anonymous said...

what roger meant to say was "Maria Bartiromo, my all-time favorite financial analyst."

(sorry, couldn't resist)

schtoonkmeyer said...

ok i still have never heard of her. what am i missing?

Michael Comeau said...

If people ask me why the market is up/down and there's no obvious answer (econ numbers, earnings, etc.), I usually go with one of the following:

1) Market is Down - it's manipulation by high-frequency traders/hedge funds
2) Market is Up - we're in full-on recovery mode!

The media should pay less attention to these day-to-day moves - there's not always a rational explanation.

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