Even If You Had a Crytal Ball, It Wouldn't Help

Who wouldn't want a working crystal ball or know what the news headlines are going to be, a day or two in advance?

"When a Crystal Ball Isn't Enough to Make You Rich" (click to read original study) a research paper by Victor Haghani and James White challenges the belief that knowing the future would guarantee investment success.

​The short answer: It Doesn't

The "Crystal Ball Challenge," an in-person November 2023 experiment involving 118 finance-trained young adults (current MBA or Masters of Finance students), the rules stated, "The object is to see how well you can do trading stocks and bonds if you know the news from the front page of the WSJ one day in advance. In other words, you’ll be in that dreamed-of position of being a trader who “knows the future.” For example, you will be shown the front page of the WSJ for a Wednesday and be able to take a long (or short position) in the stock market and in the bond market at prices prevailing at Monday’s close (that is, two days earlier)."

The Results Were Sobering

• The average payout was a paltry 3.2% gain (which is statistically indistinguishable from breaking even).
• Predicted market direction only 51.5% of the roughly 2,000 trades made.
• Half lost money, and
• 16% went bust.

The study demonstrated that even with advance knowledge of the Wall Street Journal’s front page, participants didn't perform well.  This underscores that predictive information alone is insufficient without accurate market interpretation and disciplined trading.

The paper reveals the difficulty in short-term trading and essentially having a crystal ball is no guarantee of success. The counter to trying to predict the future is, first realizing it's impossible, and even if it was possible, it probably wouldn't help much. 

To Be Successful, Investors Must Prioritize

• A robust decision framework,
• A well-thought-out investment strategy,
• Discipline, and
• An understanding of risk and return.

-Paul R. Rossi, CFA