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"If It Hasn't Happened Yet, It Doesn't Mean It Won't": Understanding Risk in Investing

Updated: Mar 15



When considering investments, one common pitfall is to assume that because a particular event or outcome has not occurred in the past, it will not occur in the future. This cognitive bias is often referred to as "normalcy bias." The saying, "If it hasn't happened yet, it doesn't mean it won't," serves as a cautionary reminder of this tendency. In the realm of investing, understanding this concept is crucial for assessing risk and making informed decisions.




The concept was popularized by Nassim Nicholas Taleb in his book, "The Black Swan". Taleb describes Black Swan events as those that are highly improbable, unpredictable, and carry massive impact. Just because we haven’t observed such events in the past does not mean they can’t or won’t happen in the future. Example: The global financial crisis of 2008 was a Black Swan event. Many investors, even sophisticated ones, failed to anticipate the collapse of major financial institutions. Those relying solely on historical data were especially caught off-guard.


The Fallacy of Linear Projection


Investors sometimes wrongly project past trends into the future linearly, assuming that because something has grown at a certain rate or followed a certain pattern, it will continue to do so indefinitely. Example: The dot-com bubble of the late 1990s is a classic illustration. Many investors believed that any business with a ".com" in its name would keep appreciating in value because that was the prevailing trend. However, when reality set in, many of these companies collapsed in value, leading to significant investor losses.


The Limitations of Historical Data


While past performance data can provide insights, it is not always indicative of future results. Market conditions, regulations, technology, and countless other variables evolve over time. Example: Blockbuster was once the dominant player in the video rental market. But technological advancements, particularly the rise of streaming platforms like Netflix, rendered its business model obsolete. An investor basing decisions only on Blockbuster's past success might have missed the looming threat.


Changing Geopolitical Landscapes


Global politics and relations can introduce unforeseen risks to investments. Relying solely on historical peace or stability in a region can lead to massive oversights. Example: Consider an investor in early 2010s Crimea. Historical data might not have predicted Russia's annexation of the peninsula in 2014. Such an event significantly altered the region's investment landscape.


Natural and Unpredictable Events


Natural disasters, pandemics, and other unforeseeable events can dramatically impact investments. Example: Few could have anticipated the far-reaching economic consequences of the COVID-19 pandemic. Industries such as travel, hospitality, and brick-and-mortar retail were particularly hard hit. Relying solely on pre-pandemic data would not have prepared investors for the volatility of 2020.


Strategies to Mitigate the "It Hasn't Happened Yet" Bias


  • Diversification: Spread investments across various asset classes, industries, and regions to reduce the risk associated with any one Black Swan event.

  • Scenario Analysis: Regularly consider various "what if" scenarios to challenge your assumptions and preparedness.

  • Continuous Education: Stay updated on global events, technological advancements, and market trends.

  • Seek Expert Advice: Regularly consult with financial advisors or experts to gain a broader perspective.


While history provides valuable lessons, investors must resist the temptation to view the past as a certain predictor of the future. The adage, "If it hasn't happened yet, it doesn't mean it won't," reminds us to remain vigilant, consider the improbable, and ensure our portfolios are resilient in the face of uncertainty.

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