Optimal #Trading #Psychology

Understanding  basic psychology is one of the most important but also most neglected tasks for investors.  Of course, everyone realises that they need to analyse the investments they are considering buying.  But many traders do not realise that winning in investment is also about successfully predicting what other market players will do.  And that is a psychological task.

Most of the advice on the internet is not really psychology.  It is quasi-psychology.  You might get famous traders telling you things like “I always played tennis in the morning before my best trades to make sure I felt good.”  This is useless.  By all means, study what these guys do to get insights into how they analyse opportunities and maybe any tricks they have for bouncing back from a loss.  But famous traders don’t have any specific training in psychology so if you are specifically wanting to improve your own trading psychology, adopting their tips (such as the tennis one above) won’t really help you in achieving that goal.

Alternatively, there are some actual psychologists who write on the topic and are experts in the field of psychology.  But be careful about their specialisms.  Someone who is a clinical psychologist may be an expert  in schizophrenia but not necessarily other aspects of human psychology.  And of course the main thing is that these experts do not have any serious trading experience, so they also can’t help you improve your trading psychology.

photo of head bust print artwork
Photo by meo on Pexels.com

To identify the right sort of person, you need to ask two questions: does this person have significant trading experience and are they qualified in a related field?  I am one of these people.

To try to convince you of this, I will outline my ideas on how to optimise your trading psychology.  The first thing to know about is that we have a lot of cognitive biases —  mental shortcuts that are often useful when we want a quick and dirty answer and often very unhelpful when we are trying to get something right.  One example is Confirmation Bias, where people look only for evidence that supports what they already believe.  There have been many robust psychology experiments published, that show time and time again that we do this often and consistently.

The first thing to note here is that if you use this bias when making your own trading decisions, you will make bad decisions.  Every time!  So you will definitely not be optimising your trading psychology.  But here’s the key point: everyone else in the markets will be doing it too.

So what does that mean?  It means you need to know about Confirmation Bias and think about it in a market context.  Look out for it in yourself and be careful.  Expect it in other market players and trade accordingly.  

That’s how you stand the best chance of optimising your trading psychology. 

See Also:

The Psychology Of Successful Trading – Behavioural Strategies For Profitability

Why #Value Investors Should Buy #Bank Stocks

The Illusory Truth Effect And Financial Markets

Bad Arguments for the Permanence of Bitcoin

 

#Strumia Is Wrong To Claim That “Smarter People Are Less Affected By Implicit #Bias”

Strumia made the claim of the title in a controversial talk at CERN.*  I will show that this claim is falsified by the psychological literature.

There are a large number of cognitive biases operative in our psychology: over 180 at the last count, and that is just the ones we know about so far.  All of these biases share the characteristics of being largely invisible to us in their operation and extremely hard to eradicate.  Data show for example that significant financial incentives do not cause reduction of the effects of some of these biases.  And I have discussed myself at length (Short, 2017) the way biases can cause highly suboptimal decision-making, even when there are very serious financial consequences.

The types of bias I mean would be exemplified by Confirmation Bias, which occurs when people look for evidence which confirms hypotheses they already believe.  I think we should also consider Gender Bias in this same arena, though the claim we should not represents an objection to my position.  I will show below that my position has adequate resources to defeat that objection, but first I will show that intelligence offers no protection against implicit biases.

I will do that by mentioning three types of bias where it was not the case that more intelligent subjects exhibited less bias, and then making a broader point.

  1. Myside Bias — this is related to Confirmation Bias.  It occurs when people evaluate and generate evidence or test hypotheses in a way that conforms to their prior opinions and attitudes.  Stanovich, West and Toplak (2013, p. 259) found that the “magnitude of the myside bias shows very little relation to intelligence.”
  2. Dunning-Kruger Effect — this is best known as the claim that unskilled persons also lack insight into their relatively poor abilities in an area.  However, similar bias effects operate at the other end of the spectrum.   Schlösser et al. (2013, p. 85) report that their model “partially explained why top performers underestimate their performances.”  (I am assuming a correlation here between high intelligence and an ability to be a top performer in the fields of endeavour examined by the authors.)  But here we see that intelligent subjects are also not immune from a variant of the Dunning-Kruger Effect.
  3. The Gambler’s Fallacy — this is the tendency to think that fixed probabilities are altered by past events.  For example, the odds of getting heads on throwing a fair coin are always 50%, irrespective of what has happened previously.  If someone sees heads ten times in a row and then says either “it must be heads again next” or the opposite, they are exhibiting this apparently maladaptive heuristic.  Xue et al. (2012) found that “individuals’ use of the [Gambler’s Fallacy] strategy was positively correlated with their general intelligence.’’

More generally, we may note that many experiments in social psychology are conducted on psychology undergraduates.  This has been mooted in the past as a potential “ecological” objection, meaning that the results could be unrepresentative of the general population.  Nevertheless, robust and widely replicated data exists to show the existence of 180+ cognitive biases.  We may assume that undergraduates in psychology are a more intelligent subset than the population in general.

I will close by considering one potential objection to my account.  This is that Gender Bias is not a cognitive bias and should not be considered in the group above where intelligence is not a protective factor.  I will counter this objection in a number of ways.

  1. If Gender Bias is not a cognitive bias, what is it?  It results in a systematic slanting of judgements away from what would be strictly rational, and that accords precisely with my working definition of a bias (Short, 2015).
  2. I do not need to assume a narrow and precise definition for Gender Bias.  I am including within it all of what people refer to by the terms Sex Discrimination, Sexual Discrimination, Homophobia, Anti-LGBTQ+ prejudice etc.  These discriminations often take place via stereotyping — assuming that everyone in group X has certain characteristics which may in fact be possessed by only some or indeed none of the members of group X.  Stereotyping appears on the standard list of cognitive biases.
  3. Krieger (1995) explicitly considers racial bias within a cognitive bias framework and includes also discussion of Gender Bias. 

I conclude that this objection fails, and that therefore the claim that intelligence protects against implicit bias is false.

*According to a letter published by the Office of the Chair, Department of Physics and Astronomy, University of California, Irvine on 01 October 2018. 

See Also:

The Psychology of Successful Trading

#Proust: An Argument For #SimulationTheory

Women Are Better Traders Than Men

The Importance Of Hindsight Bias In Financial Markets

 

References

  • Krieger, L H  1995. The Content of Our Categories: A Cognitive Bias Approach to Discrimination and Equal Employment Opportunity. Stanford Law Review  47.6 pp. 1161–1248
  • Schlösser, T, Dunning, D Johnson K L, Kruger J  2013  How unaware are the unskilled? Empirical tests of the “signal extraction” counterexplanation for the Dunning–Kruger effect in self-evaluation of performance  Journal of Economic Psychology 39, December 2013, pp. 85–100, DOI: 10.1016/j.joep.2013.07.004
  • Short, T L  2015  Simulation Theory: A psychological and philosophical consideration, Psychology Press,  ISBN 9781317598145
  • Short, T, L  2017  The Psychology of Successful Trading: Behavioural Strategies for Profitability, Routledge, ISBN 9781351601016
  • Stanovich, K E, West, R F and Toplak, M E  2013  Myside Bias, Rational Thinking, and Intelligence, Current Directions in Psychological Science, 22. 4, pp. 259–264, DOI: 10.1177/0963721413480174
  • Xue, G,  He, Q, Lei, X, Chen, C,  Liu, Y,  Chen, C, Lu, Z-L, Dong, Q, Bechara, A  The Gambler’s Fallacy Is Associated with Weak Affective Decision Making but Strong Cognitive Ability PLOS One, October 5, 2012  DOI: 10.1371/journal.pone.0047019

What Is A #Bear #Market?

People often ask what the common stock market terminology of bullish or bearish means.  While these have standard meanings in normal speech — bullish being positive or optimistic, and bearish being the opposite — at least the term “bear market” has a precise technical definition in the arena of stocks.  I will explain this here.

The formal definition of a bear market is a market that has declined 20%.

brown bear in body of water during daytime
Photo by Pixabay on Pexels.com

The first item to clear up on the way to understanding the definition is “what do we mean by a market?”  Normally people will be talking about a particular stock market index, such as for example the Dow Jones Industrial Average (“DJIA”), the S&P 500 or the Nikkei-225 (“N-225”).  So now we want to know what a stock market index is.

Individual shares go up and down all the time.  One cannot say what is happening in more broad terms to “the market” by looking at single shares because of this volatility.  So instead, one looks at a basket of shares.  That is what an index is: a basket of shares listed in a specific location.  There are thousand of these, and they can be selected in many different ways.  

To illustrate this, the DJIA is a basket of 30 major US shares that are selected so that they represent a good spread of major US stocks in different sectors such as computers, aircraft manufacture and banking.  The S&P 500 is a broader basket of shares issued by the 500 largest public companies listed in the US.  The N-225 is somewhat different as it is made up of the 225 largest stocks listed in Tokyo.  It is price weighted, meaning that more expensive stocks will be more heavily influential in the movement of the index.

So, put simply, if all of the component stocks in the DJIA go down 20% in a period, the whole index will also go down 20% over that time.  Since this index and the others are a broader measure of market sentiment than any single stock, if the DJIA goes down 20% in a period, we can say that it was a bearish episode for the market.  Since that is an approximate measure of the health of blue chip US equities, one would also be justified in saying that that period was a bearish period more generally for major US companies.

The DJIA has been published since 1896.  The graph looks like a long uptrend punctuated by occasional bear markets.  You can see this below.

Untitled

People tend to talk less about the technical definition of a bull market — they will often use it more colloquially to just mean “stocks are going up.”  But if one wanted to be precise, it would just be the opposite of a bear market.  It would mean that a particular index had increased by 20% from a trough.

See Also:

The Psychology of Successful Trading: see clip below of me explaining my new book!

Why #Value Investors Should Buy #Bank Stocks

What Is “Theory Of Mind?”

Cognitive Biases And How They Affect Stock Markets

Why #Value Investors Should Buy #Bank Stocks

I recently discussed (in Investment Styles) the two major different styles of investing: value and momentum.  One difficulty with following a value approach is the difficulty in measuring value, since much of it these days is tied up in intangible assets.  I will suggest here that, counter-intuitively, buying bank stocks is the solution to this problem.

bank bars business commerce
Photo by Michael Steinberg on Pexels.com

The value approach to investing is simple to understand, though perhaps a little harder to implement.  The basic idea is that you buy things when they are cheap.  Finding cheap assets would classically rely on looking at concepts like “book value,”  which is just the accounting value of everything owned by the firm in which you are thinking of investing.

In previous decades, book value would have been simple to calculate: you could just look at the published accounts and examine how much the accountants said each asset was worth.  A company making cars, say, would own a lot of items like factories, car parts, machinery and land.  You could look at all of those items that you could walk up to and touch, and add up all the values, and that’s it: you have calculated book value.  If you can buy the stock for less than book value per stock, you have made a good investment.  If the company sold all of its assets, and turned that book value into actual cash, each shareholder would get more than book value.  That’s why value investing is a good idea, and why you should try to buy stocks at less than book value.

This simple approach is more difficult in modern times, because IP — Intellectual Property — is much more important than it used to be.  IP is anything the company owns which is valuable but that you can’t touch.  It could be a suite of software, the value of a brand, or

close up of computer keyboard
Photo by Pixabay on Pexels.com

simply the know-how involved in producing the products or services that the company produces.  To illustrate the scale of this IP problem for value investors, consider the following estimate.  Ocean Tomo, an investment bank, reckoned that the proportion of the value of S&P500 companies which was tied up in IP increased from 17% in 1975 to a huge 84% in 2015.  So it is clear that there is a very serious problem in adopting a value investment approach these days, and that’s unfortunate because in my opinion, it is the only approach that works.

So what should investors do about this?  I think they should look at bank stocks.  This will seem dramatically strange at first sight, because banks own hardly anything at all that is tangible.  However, we already saw above that this is true for all companies now, so it can’t be avoided.  The key point though is this: there is a well-determined market value for everything owned by a bank.

business charts commerce computer
Photo by Pixabay on Pexels.com

If you look at the balance sheet for Deutsche Bank, for example, you will see a very large number of items.  They will all have market values though.  That will be true of shares, bonds, interest rate swaps, credit default swaps, loans to corporates, futures and options, office buildings, warrants, cash in various currencies and any of the other myriad financial assets.  There will also be a certain amount of brand value but I think that will be fairly low in the mix.  So basically everything owned by Deutsche Bank could be turned into cash, and a known amount of cash, quite quickly.

Banks typically traded at 2.0x book value before the crisis.  The rule of thumb for value investors in the sector was “buy at 1.0x book value, sell at 2.0.”  Something like this is still true: you can buy Deutsche Bank at 0.3x book value and I think you should.  That’s the right approach for value investors today.

See Also:

Investment Styles

What Is “Theory Of Mind?”

The Illusory Truth Effect And Financial Markets

The #Bitcoin Bubble Is Caused By The Halo Effect

Investment Styles

An Introduction To Different Ways To Invest

There are two major investment styles which take completely different approaches.  They are value investing and momentum investing.  The former, also known as contrarianism, seeks to find cheap assets to buy.  It is called contrarianism because often it involves looking for assets which are cheap because no one likes them.  Momentum investing is simpler.  This simply observes that often, assets that have been performing well continue to do so.  So investors adopting this style just look for assets which have gone up and hope that they will continue to do so.

black point and shot camera near macbook pro
Photo by rawpixel.com on Pexels.com

I favour value investing.  One reason for this is because the problem with momentum investing is that assets which have done well continue to so until they don’t.  There is no way to tell when something which has gone up will stop doing so.  And we definitely know that nothing will appreciate forever!

The difficulty with value investing is knowing when an asset is cheap.  In the early days of investing, the concept of book value was very useful.  This is simply the accounting value.  If a company owns a factory and some machinery, the book value will be close to the value for which the factory and the machines could be sold. If you can buy a share, or a slice of the company, for less than the book value per share, you should.  

Book value is still very useful on many occasions.  But modern companies are very complicated, and often much of what they do cannot be valued simply.  A lot of their worth might be tied up in software, for example, which is harder to value than a building.  Or they might own a lot of IPR — intellectual property which again, is intangible and hard to value.  But the effort is worth it.  Finding a cheap company to buy is one of the best ways to trade successfully. 

pexels-photo-1051744.jpeg
Photo by Artem Bali on Pexels.com

I have written a lot about the importance of psychological factors in investing.  It is absolutely crucial that you understand these, for two reasons.  Knowing about your own psychology will help you understand and improve your decision-making processes. It will be especially valuable to know when cognitive biases are likely to cause you to make errors in evaluating investments.  But just as important is knowing how other investors will think — after all, they have the same psychology as you do!  And knowing what other investors are likely to think of an asset is the key.  Because you want to find an asset which is not just cheap — but unjustifiably so.  Then you can expect it to go up sustainably.

See Also:

The Discerner Art Publication

What Is “Theory Of Mind?”

The Late Evaluation Effect And Financial Markets

The Psychology of Successful Trading: see clip below of me explaining my new book!

What Is “Theory Of Mind?”

Psychologists study psychological capacities – what we the call “the mind.” One of the distinctive psychological capacities of human beings is the ability to explain and predict the behaviour and mental states of other humans. Psychologists call this ability “Theory of Mind”. We all have “Theory of Mind” – but how does it work? That is, by what method or mechanism do we explain and predict other people’s behaviour?

People are very good at predicting and explaining each other’s behaviour.  We are so good at it, that often we do not realise we are doing it.  And it is very unclear how we do it.  In this post, I will briefly introduce some ideas in psychology about how we do it.

“Theory of Mind” is the label for how we predict and explain the behaviour of others.  It was originally called that because the first idea was that we have a theory of other people.  On this account, we learn this theory as children, or it is innate — meaning we are born with it.  It ought to be something like a theory in that it has some kind of rules in a system.  They would say things like “everyone who wants some ice cream will go where they think the ice cream is.”

photography of person holding two ice cream
Photo by May Day on Pexels.com

Subsequently, there was a debate as to whether this was really the right explanation for our Theory of Mind.  Alternative accounts emerged.  This means that some new terminology was required.  The account I have already outlined above, where people use a theory to predict and explain others, became known as Theory Theory.  It was, if you like, the theory that using a theory is how we do Theory of Mind!  We use rules to predict and explain the actions of others.

The challenger account was called Simulation Theory.  This says that people predict and explain others by simulating them.  In other words, I predict what you will do in a situation by imagining that I am in that situation and then deciding what I would do.  I might think (implicitly probably) “I want some ice cream, where would I go?”

We can see that both methods produce results that look plausible, to begin with.  Both of them would account for the way that if I say to you “why did Jimmy go to the ice cream van?,” you don’t have any difficulty coming up with what looks like a good answer.  What we don’t know is whether you came up with that answer by using a rule (Theory Theory) or put yourself in Jimmy’s place (Simulation Theory).

abandoned ancient antique architecture
Photo by Pixabay on Pexels.com

The debate continues as to whether Theory Theory or Simulation Theory is correct.  The major objection to Simulation Theory was that it could not explain cases of systematic Theory of Mind error.  In the Stanford Prison experiment, for example, the participants acted much more harshly than anyone outside the situation predicted.  Those objecting to Simulation Theory said that if it was the correct account of Theory of Mind, then we would be able to get the right answer.  We would be able to correctly predict the harshness of the participants by imagining that we were there.

I have provided what I think is the only response to this objection.  I call it the bias mismatch defence.  In it, suggest that if there is a systematic error in Theory of Mind, like the one in the prison experiment, it is because the people in the experiment are acting under a common cognitive bias, and the people outside it are not.  They do not simulate the bias, in other words.  There could be several reasons why they do not simulate it.  They might, for example, have no particular emotional involvement in the situation.  After all, being outside prison is much less intense than being in prison!

In this particular case of the prison experiment, I think the bias in question is Conformity Bias.  This is the way we all tend to do what we are told, to some extent.  But I could use this bias mismatch approach much more widely.  It could be used to explain any cases where people systematically fail to predict how experimental participants will react, if those participants can be seen to be exhibiting any cognitive bias.  We know about more than 150 of those so far, so there is plenty of opportunity for bias mismatch to arise.  This bias mismatch happens a lot I think, and it is why so many results in social psychology are interesting and surprising — and also why so often, we fail to understand others.

See Also:

#Narcissism and #Unexpected Behaviour

The Illusory Truth Effect And Financial Markets

The Psychology of Successful Trading: see clip below of me explaining my new book!

Simulation Theory: A psychological and philosophical consideration

 

grayscale portrait photo of shocked woman
Photo by Alexander Krivitskiy on Pexels.com

#Proust On #Memory

I will argue that Proust has an interesting and modern perspective on the role and function of memory, based on an early perspective — by which I mean just the first two books.

Midway in book two, the “narrator” is surprised and delighted to receive a letter from Gilberte.  (I place the word “narrator” in scare quotes because it is already clear to the reader that the person writing is doing so with a much more sophisticated perspective than would be available to a child or adolescent.)  This occurs just before the introduction of the name Albertine; a name one is already certain will be of the highest significance.

green ram card collection
Photo by Fancycrave.com on Pexels.com

One immediate observation is that both the names Gilberte and Albertine appear to an English speaker to be feminised versions of male names (but this may just be an artefact of time in that those were common at the time).  More importantly, the name of Albertine is suggested in the way that Gilberte’s signature apparently begins with a G which looks like an A and the l is undotted; together with the way the final e is obscured in a “flourish” such that we could imagine it to be “–ine.”

This cannot be understood by the reader on first pass at least since the name Albertine has not yet at that stage been introduced — though it is about to be — which makes it seem to be something like a “shadow of the future…”

This all seems to tie in with the way “narrator” writes in an impossibly sophisticated way for a child and how all of the relations towards women seem to be similarly obsessive — it looks now as though either Swann relates to Odette in the same way as “narrator” does to Gilberte (and one awaits the arrival of Albertine with interest).  Or, more plausibly, as though “narrator” is mapping his later more subtle appreciations on to others or finally — and we are presumably supposed to be talking about memory in In Remembrance of Times Past — to the idea that memory does not record events but is a later fabrication of them with heavy embeddings of later intellect/desire/perceptions which would be a very modern approach.

It is still common to see memory on a photography model: a more-or-less faithful record of actual events.  Modern psychology sees it much more along the lines of a later heavily-biased reconstruction.  Philosophers have taken varied views; Nietzsche has a particularly modern approach.  I discuss this and outline some of the contrasting philosophical views in my thesis: http://discovery.ucl.ac.uk/1421265/

ball shaped circle close up dark
Photo by Pixabay on Pexels.com

Returning to my “shadow of the future” remark above, we could say — if Albertine turns out to be yet another obsessive love, and perhaps the paradigm case — that “narrator” has painted aspects of that episode on to all previous memories of love affairs including the initial one he apparently had with Gilberte, and even his perceptions/recollections of the one that Swann “must have had” with Odette.  That would explain Swann’s readiness to destroy his own social position and consort with the most mediocre people in order to be with her.

Naturally, all of this remains subject to revision depending on subsequent developments, but I think it is already clear that Proust is working with extremely subtle and sophisticated conceptions of memory and identity.

See Also:

#Proust: An Argument For #SimulationTheory