If you have ever made financial decisions based on gut feelings, hunches, or avoided certain dates for investing, you are not alone.
Financial superstitions are more common than most investors care to admit, and they’re quietly influencing portfolios across the globe.
Research from the Australian National University reveals these unfounded beliefs can significantly impact financial decision-making and stock market behavior. What’s fascinating is how deeply these beliefs penetrate even the most rational financial minds.
1. The October curse that spooks investors
October has earned its reputation as the market’s most feared month, and for good reason. The Panic of 1907, the Crash of 1929, Black Monday, and the 2008 financial crisis all unfolded during this supposedly jinxed time. Nine of the 20 largest single-day percentage declines in the Dow Jones Industrial Average happened in October.
This grim track record has created a self-fulfilling prophecy. Investors often pull back from major decisions during October, creating the very volatility they’re trying to avoid. While there’s no logical reason October should be any riskier than other months, the collective anxiety creates real market movements.
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2. Friday the 13th and the mysterious market dips
Superstition meets statistical reality in the strangest way. Research shows market index returns on Friday the 13th are notably lower than on other Fridays. There is absolutely no fundamental reason for this pattern.
What happens is pure psychology. Enough traders believe something bad might happen that they trade more cautiously or sit out entirely. This reduced activity and increased caution create the exact market weakness everyone feared. It’s behavioral finance at its most irrational, yet the impact on returns is measurable.
3. Your own zodiac year is unlucky
Chinese horoscope believers consider their own zodiac year particularly unlucky. Mythology suggests people offend Tai Sui, the God of Age, during this time.
The belief in bad luck makes these financial professionals more cautious and risk-averse. They’re more concerned about making errors and adhere more strictly to accounting standards. The outcome is that this superstition accidentally improves financial outcomes.
4. The Super Bowl stock market predictor
Since 1978, some investors have sworn by the Super Bowl Indicator, which claims the game’s outcome predicts the stock market’s direction for the year.
This “indicator” has zero logical basis, yet it gained enough traction that major financial publications still mention it annually. Recent years have shown it to be about as reliable as a coin flip, but some investors still factor it into their thinking, proving how entertainment and superstition can bleed into serious financial planning.
Breaking free from financial folklore
These superstitions might seem harmless, even entertaining, but they can lead to poor financial decisions. When investors act on unfounded beliefs instead of sound analysis, it causes mispricing, volatility, and suboptimal outcomes.
The solution isn’t to completely ignore human psychology, but to recognize when superstition might be influencing your decisions. Ask yourself: Am I avoiding this investment because of data or because of the date? Am I following the crowd based on evidence or folklore?
If you have more than $100,000 in savings, advice from a pro is likely more reliable than superstitions. SmartAsset offers a free service that matches you to a vetted, fiduciary advisor in less than 5 minutes.
Humans naturally rely on superstitions to cope with uncertainty, but prioritizing critical thinking and evidence-based research is essential. Your portfolio’s performance should depend on research and strategy, not whether Mercury is in retrograde.
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