“Trade what you see” is a common mantra among short-term traders who formulate their trade ideas from charts. But do we process information from charts in accurate and non-biased ways?
An interesting set of studies reported in the 2003 Journal of Behavioral Finance suggest that perceptual biases in what we see can skew our trading and investment decisions.
Specifically, when investors see a chart that has a salient high point, they are more likely to want to buy that stock. When the chart depicts a salient low point, they are more apt to sell. In the words of the authors, “expectations about future prices assimilated to extreme past prices.”
The authors found that, when a chart contained a highly noticeable high point, traders listed more favorable features of the stock; when the chart depicted a salient low, more negative aspects of the stock were emphasized. Their analyses suggest that charts affect investors by providing them with enhanced access to either positive or negative information about the stock. In other words, our processing of the chart creates a selective bias in retrieval, leading us to view shares in artificially positive or negative ways.
It isn’t too far from the authors’ finding to a broader psychological hypothesis that *any* highly salient feature of a trading situation may skew information retrieval, perception, and action. For instance, the salient information may be a recent large gain or loss; a dramatic market move; or a piece of news. Trading what we see might be dangerous for the same reason that it is dangerous to trade what we hear or what we feel.
When one facet of a situation becomes highly salient to us, we overweight it in our perception and information processing. Our ability to view the entire situation in perspective is compromised. What is most obvious in a chart–or in our minds–may not be an accurate reflection of underlying supply and demand in a marketplace.
Archives of “future prices” tag
rssTraders Make Decisions based on Probabilities
Most traders take price swings personally. They feel very proud when they make money and love to talk about their profits. When a trade goes against them they feel like punished children and try to keep their losses secret. You can read traders’ emotions on their faces.
Many traders believe that the aim of a market analyst is to forecast future prices. The amateurs in most fields ask for forecasts, while professionals simply manage information and make decisions based on probabilities. Take medicine, for example. A patient is brought to an emergency room with a knife sticking out of his chest – and the anxious family members have only two questions: “Will he survive?” and “when can he go home?” They ask the doctor for a forecast.
But the doctor is not forecasting – he is taking care of problems as they emerge. His first job is to prevent the patient from dying from shock, and so he gives him pain-killers and starts an intravenous drip to replace lost blood. Then he removes the knife and sutures damaged organs. After that, he has to watch against infection. He monitors the trend of a patient’s health and takes measures to prevent complications. He is managing – not forecasting. When a family begs for a forecast, he may give it to them, but its practical value is low. (more…)
9 Wisdom Quotes from George Soros
George Soros doesn’t need an introduction. He is a living trading legend. Here are some of the smartest things he has ever said about markets. His thoughts are in brown.
1. Perceptions affect prices and prices affect perceptions
I believe that market prices are always wrong in the sense that they present a biased view of the future. But distortion works in both directions: not only do market participants operate with a bias, but their bias can also influence the course of events.
For instance, the stock market is generally believed to anticipate recessions, it would be more correct to say that it can help to precipitate them. Thus I replace the assertion that markets are always right with two others: I) Markets are always biased in one direction or another; II) Markets can influence the events that they anticipate.
As long as the bias is self-reinforcing, expectations rise even faster than stock prices.
Nowhere is the role of expectations more clearly visible than in financial markets. Buy and sell decisions are based on expectations about future prices, and future prices, in turn are contingent on present buy and sell decisions.
2. On Reflexivity
Fundamental analysis seeks to establish how underlying values are reflected in stock prices, whereas the theory of reflexivity shows how stock prices can influence underlying values. One provides a static picture, the other a dynamic one.
Sometimes prices change before fundamentals change. Sometimes fundamentals change before prices change. Price is what pays and until expectations change, prices don’t change. What causes expectations to change? – it could be change in fundamentals or change in prices. So what I am saying is that sometimes prices could be manipulated to change expectations, which will fuel further price momentum in a self-reinforcing way.
3. “Once a trend is established it tends to persist and to run its full course.” – Sentiment changes slowly in trending markets (up or down) and extremely fast in choppy, range-bound markets.
4. “When a long-term trend loses it’s momentum, short-term volatility tends to rise. It is easy to see why that should be so: the trend-following crowd is disoriented.” (more…)
5 Facts for Speculators & Traders
1) It’s not by making large profits that money is made over time. It’s by consistently keeping losses small in relation to profits. |
A Look at 9 Quotes from George Soros
1. Perceptions affect prices and prices affect perceptions
I believe that market prices are always wrong in the sense that they present a biased view of the future. But distortion works in both directions: not only do market participants operate with a bias, but their bias can also influence the course of events.
For instance, the stock market is generally believed to anticipate recessions, it would be more correct to say that it can help to precipitate them. Thus I replace the assertion that markets are always right with two others: I) Markets are always biased in one direction or another; II) Markets can influence the events that they anticipate.
As long as the bias is self-reinforcing, expectations rise even faster than stock prices.
Nowhere is the role of expectations more clearly visible than in financial markets. Buy and sell decisions are based on expectations about future prices, and future prices, in turn are contingent on present buy and sell decisions.
2. On Reflexivity
Fundamental analysis seeks to establish how underlying values are reflected in stock prices, whereas the theory of reflexivity shows how stock prices can influence underlying values. One provides a static picture, the other a dynamic one.
Sometimes prices change before fundamentals change. Sometimes fundamentals change before prices change. Price is what pays and until expectations change, prices don’t change. What causes expectations to change? – it could be change in fundamentals or change in prices. So what I am saying is that sometimes prices could be manipulated to change expectations, which will fuel further price momentum in a self-reinforcing way. (more…)
Traders Make Decisions based on Probabilities
Most traders take price swings personally. They feel very proud when they make money and love to talk about their profits. When a trade goes against them they feel like punished children and try to keep their losses secret. You can read traders’ emotions on their faces.
Many traders believe that the aim of a market analyst is to forecast future prices. The amateurs in most fields ask for forecasts, while professionals simply manage information and make decisions based on probabilities. Take medicine, for example. A patient is brought to an emergency room with a knife sticking out of his chest – and the anxious family members have only two questions: “Will he survive?” and “when can he go home?” They ask the doctor for a forecast.
But the doctor is not forecasting – he is taking care of problems as they emerge. His first job is to prevent the patient from dying from shock, and so he gives him pain-killers and starts an intravenous drip to replace lost blood. Then he removes the knife and sutures damaged organs. After that, he has to watch against infection. He monitors the trend of a patient’s health and takes measures to prevent complications. He is managing – not forecasting. When a family begs for a forecast, he may give it to them, but its practical value is low. (more…)
Traders Make Decisions based on Probabilities
Most traders take price swings personally. They feel very proud when they make money and love to talk about their profits. When a trade goes against them they feel like punished children and try to keep their losses secret. You can read traders’ emotions on their faces.
Many traders believe that the aim of a market analyst is to forecast future prices. The amateurs in most fields ask for forecasts, while professionals simply manage information and make decisions based on probabilities. Take medicine, for example. A patient is brought to an emergency room with a knife sticking out of his chest – and the anxious family members have only two questions: “Will he survive?” and “when can he go home?” They ask the doctor for a forecast.
But the doctor is not forecasting – he is taking care of problems as they emerge. His first job is to prevent the patient from dying from shock, and so he gives him pain-killers and starts an intravenous drip to replace lost blood. Then he removes the knife and sutures damaged organs. After that, he has to watch against infection. He monitors the trend of a patient’s health and takes measures to prevent complications. He is managing – not forecasting. When a family begs for a forecast, he may give it to them, but its practical value is low. (more…)