The Cassandra Syndrome & Demon Extrapolation

Money   Written by David L. Smith - Word Count: 1418
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Why calamity catches us by surprise.   And what to do about it.

Novice investors often suffer serious losses from economic calamities causing sudden market reversals that catch them by surprise. Blame the Cassandra Syndrome and Demon Extrapolation, two very basic psychological mechanisms we all share to some extent. Learning to overcome these two very common pitfalls is essential for anyone striving to avoid surprises and become a seasoned, successful investor. Let me tell you about the Cassandra Syndrome first.

I define the Cassandra Syndrome as the refusal to contemplate bad news about the future usually accompanied by rejection of the messengers who bring it. Remember Cassandra? Recall the Iliad, in which Homer tells the story of the beautiful young princess, Cassandra, to whom Apollo gave the gift of clairvoyant prophesy and, when she rejected him, cursed with disbelief ­she could see the future clearly, but no one would believe her predictions.

Greek myths, as you know, are all about human nature ­even the gods are human. The Cassandra myth reveals how it is human nature to refuse to hear bad news about the future and to reject, disparage and sometimes kill the messengers who deliver it. Succumbing to the Cassandra Syndrome, we run the risk of ignoring the most valuable information we can get, to our great regret. See how the Cassandra myth makes the point.

When Cassandra’s brother Paris returned to Troy with Helen, Cassandra shrieked with horror and despair, and railed against him because she foresaw Troy would be attacked and plundered by Greek armies coming to rescue Helen. Cassandra’s father, King Priam, did not want to believe that Troy’s peace and prosperity would be shattered by Greek armies. It was much more comfortable to believe Troy’s longstanding peaceful and prosperous independence would continue forever, without hostile Greeks at the gate. So Priam locked Cassandra in a palace room to keep her quiet. It wasn’t long before Troy was surprised by Greeks pounding at the gate.

After about a decade of fruitless siege, when the Greeks had seemingly given up and left, nobody believed Cassandra when she warned that the wooden horse the Greeks left at Troy’s front gate was full of soldiers. No Trojan wanted to believe the departed Greek armies would come back. It was more pleasant to envision a future without hostile Greeks surrounding them. However, once again, Cassandra was right. The Greek soldiers emerged from the horse at night, surprised the Trojan guards and opened the gates to the returned Greek army, which then sacked and burned Troy, brutally slaughtering most of its inhabitants.

After the destruction of Troy, Cassandra was taken captive back to Greece by king Agamemnon. Once there, Cassandra quickly sized up the situation and warned Agamemnon that his wife, Clytemnestra, and her lover, Aegisthus, were plotting to kill them. Agamemnon did not want to believe his wife was unfaithful or murderous. It was more pleasant to envision a future without wifely deceit, betrayal, and lethal motives. Agamemnon ignored Cassandra¹s prescient warning, and so the king and Cassandra were killed, just as she had foreseen.  

Imagine Cassandra’s excruciatingly bitter irony: she could clearly see calamity coming, she could cry out the warning, but no one would believe her. She was the original vox clamantis in deserto (my college motto, by the way). As Cassandra cried out in the wilderness, her listeners, yearning for a happy future, suffered the ultimately fatal consequences of refusing to hear bad news simply because they did not want to believe it could happen.

Dismissed as a doomsayer, Cassandra was then condemned to live the horrors she had foreseen, including her own imminent death. It is worth noting, that each of Cassandra’s pessimistic prophesies provided the most valuable information her audience could have heeded, and by the same token, proved to be the most costly advice they would ever ignore.


Which brings us to the lesson of the Cassandra myth. It is one thing to dismiss gloomy predictions after careful consideration, if they are clearly flawed. However, if you find yourself dismissing bad news out of hand, because like the Trojans, you don’t want to believe calamity is coming and prefer the comfort of imagining a pleasant future, you suffer from the Cassandra Syndrome. My advice to you is: Snap out of it! Major calamities are not swayed by our desires; they will happen regardless of our wishes. The only question is, will you succumb to the Cassandra Syndrome and refuse to contemplate approaching calamity, and thereby suffer its consequences; or will you heed cogent warnings of impending calamity and be prepared when it comes?

Seasoned, successful investors learn to examine their response to dire predictions and resist the tendency to reject them out of hand in a fit of wishful thinking. Instead they logically weigh the merits of the arguments presented in support of each plausible calamity scenario, and if they are sound, respond to them appropriately with profitable investment strategies, as developments confirming the scenario begin to materialize. Moreover, seasoned investors do not conclude that because a predicted event hasn’t happened, that it won’t happen. This is a state of mind astute investors grow into, some by hard experience, others by sudden insight. Hopefully I can save some of you the hard experience by offering you the sudden insight.  

In addition to the Cassandra Syndrome, most of us suffer from another psychological mechanism that leaves us vulnerable to surprises: demon extrapolation -- the human tendency to project our immediate past into the indefinite future. It is a useful mechanism much of the time, since often the future does resemble the past. However, demon extrapolation implies the future will advance indefinitely in a straight line from the past. Yet history tells us straight lines are rare in economics and finance, and never last.

Demon extrapolation is analogous to driving while looking into the rear view mirror. Not surprisingly, therefore, demon extrapolation suffers from the same fatal flaw as driving while looking backwards: you always miss the turns ahead. There is nothing in the immediate past revealing changes in the direction of the road ahead, so, if you expect “more of the same” indefinitely, you invariably miss a turn, crash and burn. . . guaranteed.

Astute investors regard the immediate past only as a point of departure from which inevitable turns are likely to originate. They study the curves of the distant past as an indication of how curvy the future is likely to be. They also notice conditions in the past that have signaled imminent turns and use these signs as warnings of turns to come. As these signals of impending turns multiply, seasoned investors re-deploy their assets so as to prosper from the new conditions likely to prevail after the turn. Consequently, they do not buy and hold, but rather buy and sell to make money.

So while there will be calamities in our future, the good news is, by avoiding the Cassandra Syndrome and Demon Extrapolation, you are likely to see calamity coming and not only avoid suffering adverse consequences from it, but by monitoring its progress and adroitly redeploying your resources as it develops, you will profit handsomely when calamity comes. Remember, for every move, up or down, in any market, there is a profitable course of action. The trick is in navigating the turns so that you are riding the horse in the direction it’s going.

When the Chinese write "crisis," they combine the characters for "danger" and "opportunity."  Louis Pasteur, a man intimately acquainted with the dangers and opportunities arising from crises, once said "Chance favors the prepared mind." I urge you to learn the lessons of the Cassandra Syndrome and Demon Extrapolation so that you may prepare yourself to find the opportunities in the calamities ahead.

This might just be the most valuable information you will ever get, and the most expensive advice you will ever ignore.


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David L. Smith is an economist and futurist whose views have intrigued U.S., Canadian and international audiences over the past 20 years. Describing the transformation of the global economy presently underway, Dr. Smith provides logical and useful predictions about the economic and social conditions we are likely to encounter as we begin the 21st century. He is the author of Cyclical Investing. For information about David’s Keynote presentations,



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