”This Time it’s Different” and 2 Other Investing Fallacies - Deepstash
”This Time it’s Different” and 2 Other Investing Fallacies

”This Time it’s Different” and 2 Other Investing Fallacies


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”This Time it’s Different” and 2 Other Investing Fallacies

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Expectations during the formation of bubbles

When investors deal with an exceptional event, they often say, ”This time, it’s different.”  It is more likely to happen during the formation of bubbles.

For example, in 2021, investors and commentators said we were in a bubble for growth stocks and SPACs. While some said it was similar to the Dotcom crash of 2000, other investors said we're certainly not in a bubble. We were, and it started to crash from mid-2021. 


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Didier Sornette, a former professor of Entrepreneurial Risks at the Swiss Federal Institute of Technology, published a book,  Why Stock Markets Crash, and found that half to two-thirds of all bubbles crashed.

Stock market events repeat themselves. When fiscal policy is easy, and credit comes cheap, asset prices rise. The trend inevitably reverses at some point. 


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The “Hot hand” fallacy: When you can’t lose

The “hot hand” fallacy is a cognitive bias that assumes a person who experiences a successful outcome has a greater chance of success if they continue. 

When you invest during a bull market, you may feel like a winner on every investment or trade. But hot streaks never last. It is unsustainable if you want to build long-term wealth.


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Extrapolation is estimating the values of a variable based on known data. Scientists can look at the existing birthrate and use that data to extrapolate the future population. However, it's not a reliable method when dealing with finance and the economy.

For example:

  • If today is bad, you assume the future will worsen. 
  • If today is good, you assume the future will be even better.

Nothing lasts forever, not the bad or the good times.


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The aware investor avoids losing all their money

Long-term investing is about ensuring you can keep investing. It's not about the right stocks, taking risks, buying low or selling high.

Smart investors stay in the game regardless of the conditions. They recognize patterns in the market and their own thinking, which is an important characteristic of sound investing.


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