David Dreman founded Dreman Value Management in 1977 and has written many books and articles on contrarian investing. In this mini-series I will highlight certain aspects of his investment philosophy that resonate strongly with me.
According to Dreman, sound investment decisions are obstructed by psychological biases that I have called heuristic thinking. Crowd behavior is therefore irrational, which leads to market bubbles and violent selloffs. Contrarian investing aims to profit from the excess.
Dreman discusses the representativeness heuristic: human tendency to draw analogies and see similarities in things that are completely different. Overemphasis on similarity leads to miscalculation if we forget to assess the actual probability of an event occurring. One example would be recognizing a company as belonging to the automotive industry and remembering what happened last time an automotive stock was purchased. Representativeness reduces perceived importance given to the variables critical in determining actual probability of the event (e.g. the stock moving higher).
Dreman discusses the law of small numbers, which is a judgmental bias that occurs when one assumes characteristics of a sample population can be estimated from a small number of observations or data points. An example would be investors flocking to the hottest mutual fund. Research suggests funds that outperform in one time period often underperform in the next. Investors also tend to follow stock analysts who have demonstrated recent accuracy rather than checking the analyst’s performance over time for a logical measure of accuracy.
Investors ignore regression to the mean. Data show a tendency for valuations and returns to revert back to long-term averages—a conclusion overlooked by investors who pile in to buy a hot stock or rush to dump out-of-favor shares.
Investors fall prey to information overload, which is related to information bias. When under siege by information, people tend to see only what they are interested in while blocking out the rest. This is related to confirmation bias. Information bias is a delusion that more information guarantees better decision making.
In the next post I will review Dreman’s recommendations to overcome heuristic thinking.Categories: Wisdom | Comments (0) | Permalink
This morning I take a macroscopic view wondering what I’m trying to do here and why I seem to disagree with so many others in the financial industry. It’s not just that I’m trying to find a better approach: I’m trying to determine whether a better approach even exists.
I am not exaggerating when I say almost everywhere I look, I see marketing of a better trading/investing approach (substitute “Holy Grail” to make for slight exaggeration). Many seemingly innocent, matter-of-fact claims are actually the Holy Grail in disguise but that’s beyond the scope of this post.
Just as I questioned whether successful traders exist, I question whether a better trading/investing approach exists.
Consider the following observations:
–The disappearance of popular/outspoken traders over time
–Frequent flaws in advertising/marketing claims (e.g. affirming the
consequent, hasty generalization, fallacy of the well-chosen example)
–Rampant confirmation bias
–General ignorance about trading system development and inferential
statistics: tools capable of installing meaningful objectivity into an
environment of variable moving targets
–Multiple “professionals” telling me that generation of consistent, modest
annual returns [in comparison to what many investment newsletters and
trader education programs advertise] would have the big money storming
down my door to invest if I were to start a hedge fund
–Repetitive articles in financial planning and investment periodicals about
slight outperformance relative to benchmarks translating to large AUM
—American Greed on CNBC
–Financial industry’s overall ignorance about and misrepresentation of options
to the general public
–Attraction of discretionary trading as the Holy Grail for many profit seekers
If the concept of “a better investing approach” were on trial then perhaps none of these observations taken individually would be sufficient for debunking. Taken together, however, I see a boatload of reasonable doubt.
Sometimes I feel like the Bizarro world of X-Files. On the TV program, Mulder feels compelled to continue searching to ultimately discover “the truth is out there.” With regard to finance, I wonder if there is no particular truth to be found (i.e. a better way) even though everywhere I look I see advertising suggesting there is.Categories: About Me | Comments (0) | Permalink
“Birds of a feather flock together.” So why don’t we as retail investors? I want to spend some time discussing this based on my time spent trying to network with others and meeting with trading groups.
I have had a difficult time trying to find other traders with whom to discuss option trading much less to collaborate on trading system development. I have already written about trading as a lonely pursuit.
If I were a conspiracy theorist then I would say this happens by design. “Divide and conquer” must be an institutional mantra because working unchecked, we [retail traders] fall prey to heuristic thinking. This probably contributes in large part to the fact that 80-90% of retail traders lose money to institutional coffers.
Except I am not really a conspiracy theorist.
Varied style preferences are perhaps the biggest reason traders have difficulty hooking up. Preferences are responsible for what tickers I like to trade, what software I like to use, what time frame I like to trade, and many other considerations. Incongruity amid any of these factors may be sufficient for incompatibility. If I am lucky enough to find a trading group where 10-20 people come together then what’s the probability I will find matches across the spectrum?
Aside from individual preferences, differences in personality traits can derail a potential partnership. I may not like anger, sarcasm, conceit, or laziness. It’s almost like we need eHarmony’s 29 dimensions of compatibility to discover who will get along. This isn’t like a corporate job, either, where people are forced to cooperate or be fired. When we can walk away without obligation, we will. I have found traders (myself included) to be a very fickle lot.
Bottom line: when I overlay the low probabilities of finding an overlap in style with finding a solid personality match, it’s no surprise why the trading space ends up seeming sparsely populated. Suddenly it makes more sense why people turn to commercial means (e.g. selling newsletters, trading services, or forming “trader education” companies) in an effort to create a following and to foster community.Categories: Networking | Comments (0) | Permalink
Several weeks ago I listened to a presentation by David Wilt, co-founder of QuantyCarlo [QC], and for perhaps the first time in the option trading space, I heard what sounded like a kindred spirit. Today I will post some excerpts.
“With this tool you can propose a set of values for DTE, study them, and then evaluate
them: which gives you the best results and whether or not—and this is tremendously
important—any of those results are statistically significant or whether you are simply
looking at the random, stochastic behavior of trades in a sample space.”
“Desirability index is a standard method in inferential statistics and modeling—a single
measure (from 0 to 1) that reflects outcomes of interest to you.”
“When we have results from any kind of backtest… the first question you have to answer
is whether results are statistically significant: can you feel comfortable that when you
trade live you will get similar results?”
“QC Enterprise… provides you with a statistically sound (scientifically sound means to
provide significant, predictable, reliable improvements)…”
“I am absolutely convinced that 20-30 years from now, people will look back on this
and say ‘well that was easy. That was a no-brainer.’ I think what we’re really doing
here is taking a series of methods and techniques that have been applied in other
industries and bringing them to the options trading space and what we have here
is a tool that allows us to do the tests fast enough and sufficiently enough to
apply these statistical models and give us the kind of predictive capability that
has been achieved in other industries.”
“We want to get this in front of the people because there are a huge number of
smart people out there. We believe strongly that if we can engage them… if
they will share with us their views of QC: good, bad, or indifferent… if we
can learn from them then we will be able to continuously enhance this product.
The engagement with folks and the learning that we can anticipate from engaging
with them is invaluable and we appreciate the time and we appreciate people’s
questions and we appreciate their comments because that’s so important to
making this product and making the community more successful and I think
that’s really what we’d like to see. So I want to personally thank everybody
and say I look forward to the continued dialogue and I’m sure… QC [will] be
better for it.”
I look forward to learning more about QuantyCarlo!Categories: Trading Software | Comments (0) | Permalink
Over a year ago I was compelled to respond to “Pete,” a guy who had some definitive, optimistic words for trading strategies he claimed to be using. He posted a number of times before I responded with the following:
> If there’s potential reward then there is no such thing
> as zero risk.
> Your posts have full of phrases like:
> –“consistent weekly profits”
> –“‘gravy’ forever into the next generation”
> –“the coast is clear to keep it and make premiums
> until it runs up again”
> –“those who stayed are rich and retiring”
> –“sounds to me like profit all day long and all
> the way to the bank”
> –“this is a triple grand slam with insurance.”
> Where’s the one about trading being like an ATM
> machine that continuously spits out cash?
> Nothing about trading or investing is free, nothing
> is guaranteed, and nothing here is ever worth the
> kind of exuberance you seem to project with your
> posts. There’s risk inherent with everything and
> if you trade too large aiming to be too greedy then
> you will one day learn the hard way by getting
> blown out of the game for good.
Pete responded by asking me what I felt could possibly be wrong with some of the trades he was putting on. I replied:
> I’m not going to specifically analyze the pros/cons
> of your trade because we have other wonderful
> traders here who routinely share such insights
> Hopefully they can help with some of your analysis.
> Based on my real-world trading experience, though,
> focus on what I said in my last post. It’s at
> least urban legend (if not definitive truth: nobody
> knows) that over 80% of all traders lose money.
> Personally, I think the #1 culprit is unrealistic
> expectations. If you enter the markets thinking
> you’re going to make too much per month then
> you’re going to get beheaded. Your phrases that I
> quoted all suggest just that.
> Hence my caution: learn how to determine the real
> risk, watch your back, and be careful. If you don’t
> see the risk then walk (or run) far away.
I think this is good advice for everybody and that includes, first and foremost, myself. I try to remember this stuff each and every day.Categories: Money Management | Comments (0) | Permalink
Here is a table showing performance of five different investing strategies. Which one is the best?
Do you agree with E > D > C > B > A?
This assumes fixed position sizing. No matter how good or bad the strategy does in any given year, fixed position sizing means I risk the same amount for the following year. This is not typically how longer-term investing is modeled. You’ve probably seen the compound growth curve that so many investing firms and newsletters like to market:
I will not get curves like this by doing the math shown under the “Expected Cumulative Return” column. Beautiful exponential curves are only possible if I remain fully invested. As the account grows, my position size grows. Exponential returns are not a by-product of fixed position sizing.
Following a fully-invested, compound-returns financial plan will generate the following from our five investing strategies:
Now it seems the investment strategies should be ranked D > C > B > E > A. Note how the mighty (E) has fallen! This is the risk of trying to compound returns. Big percentage losses early leave a small amount in the account to grow when the strategy performs well. Big percentage losses late when account equity is at all-time highs have the biggest gross impact.
So which strategy is best?
We must first determine whether fixed or variable position sizing is used to better understand what we are looking at.
One additional column presents some revealing information:
E, the strategy that initially looked best but proved to be rather poor, has by far the highest standard deviation (SD) of returns. SD measures variability of returns. This is why the Sharpe Ratio—a performance measure where higher is better—has SD in the denominator.
In summary, when comparing performance higher average annual returns are better but only to a point. Returns must also be consistent because excess variability can be detrimental. This is why I often study maximum drawdown: the kind of variability capable of keeping me up at night and causing me to bail out of a strategy at the worst possible time.Categories: System Development | Comments (0) | Permalink
Today I will conclude my review of the first day trader Meetup.
Once we finally got around the table and through the introductions, the organizer took 15 minutes to present one strategy and a few other slides. We then got to eating and talking among ourselves. It seems like a good group of people. Being filled with newbies, I think the group could benefit from some basic presentation about trading. This would include some teaching on trading system development, countering heuristic thinking tendencies, and general tenets of optionScam.com.
Later that evening, WM posted a comment on the website:
> I came to a day trading group with undesired long term ideas. I
> then tried to force them on the group. SORRY won’t happen again.
My intent was not to make this guy feel bad but rather to teach him something. I figured that unfortunately, he would just go on studying Hurst and continuing to get nowhere. WM is like the occasional entrepreneur we see on Shark Tank who has spent a huge amount of money [and time] trying to develop a product/business. Without revenue the Sharks often shake their heads and say things like “this is just a bad idea,” or “cut your losses already and move onto something else.”
The Holy Grail is advertised and marketed in many places. I firmly believe it is myth and only capable of impeding my progress by draining resources. One way I avoid this trap is to steer clear of anything too complex. In WM’s case, the advanced theoretical math is literally way over his head. Anything “proprietary” is also too complex for me because by definition, I will never know what it is.
A second Meetup was held a few weeks later on a Wednesday evening and only three of us (WM, the organizer, and myself) showed up. Yes, WM was still trying to preach Hurst theories and he eventually stood up and said “thanks guys but this group just isn’t for me.” I think he’s too brainwashed to contribute but I do hope others attend future Meetups.Categories: Networking, Trader Ego | Comments (0) | Permalink
Last time I praised the organizer of this new Meetup for being a humble, normal guy. Despite his best intentions, we were not spared from blind ego supplied by someone else in attendance.
Like Mr. Know-It-All and our friend DY, let me introduce you to WM. Before the meeting, he posted on the website, “Everyone should check out J M Hurst. He discovered how the market works by using electrical engineering math.”
The Meetup started with the organizer having everyone introduce themselves. WM began by taking 5-10 minutes to explain how Hurst has figured out the markets with his engineering math. He said this works for all markets including stocks, commodities, futures, and currencies: “if you analyze the data then you will see for yourself!”
Since my turn was next, I looked WM squarely in the eye and said “I tend to be skeptical so we will probably do some arguing later on.”
For 30 minutes out of the two hours, we did just that. I started by asking WM whether he is making good money with Hurst’s methods. He said no. I asked if WM’s level of sophistication is sufficient to understand the complex math behind Hurst’s methods. He said no. I asked if WM could reliably predict the future price move on some random charts by applying Hurst’s methods. He hemmed and hawed then failed at several attempts.
WM tried to defend himself by saying “I don’t understand Hurst’s teachings but I have no doubt that a group of us can combine our efforts and make great money.” My blood was boiling and I couldn’t help but raise my voice in talking to him because I felt he wasted so much of our time.
WM reminded me of entrepreneurs appearing on “Shark Tank” with outrageous valuations for their pre-revenue companies. Revenue is proof the product can sell. Without revenue there is little value. Unless WM had been successful making money the Hurst way, we have no reason to think anyone can. Why is he trying to sell it as the Holy Grail? How would he know?!
I am a fool destined for the poorhouse if I have blind faith in matters related to trading and investing.Categories: Financial Literacy | Comments (1) | Permalink
A couple months ago I went to a new Meetup for day traders. This is only the second such group I have seen in the state. The other one has a few hundred members but has been inactive for years. The organizers are franchisees of a well-known national trading school that I believe to be a spam-filled money pit. I had met the organizer of the current Meetup twice in the past so I was interested to see what he put together.
I made my way through the wintery cold on a Saturday afternoon to a quaint, Italian restaurant close to downtown. Eight attendees sat around a table with a TV monitor in the room. Two out of the eight seemed to trade stocks regularly but only the organizer was a consistent day trader.
I give props to the organizer for his humility. He claims to make some money day trading but does not profess to make a lot. He said last year he made $30K but lost $10-20K. He’s looking to become more consistent and to that end he started this group as a means to exchange ideas with others. With a smile, he describes himself as lazy: he wakes up in the morning, sets his entries/exits, and then goes back to sleep. He once told me he hits the bars most nights.
Yes, I am giving props to a guy who doesn’t make much because he prefers to be out late drinking on weeknights!
To me this represents something more insidious about the whole lot of retail traders: we aren’t perfect! Nobody is. So why do I get the marketing/advertising face of positivity, of triumph, and of ego all too often when hearing other traders talk? People sound like they’ve expertly got things all figured out. People try to sell others or to garner a following. You’ve seen me write about this time and time and time again.
No, there’s nothing particular about this organizer. He seemed to be a typical, John Doe type of guy.
If only the story would end right there…Categories: Trader Ego | Comments (1) | Permalink