To readers of the following article:

The Harvard Business Review editors of this article introduced an error on page 81 during the editing process. As a result, what was published is mathematically incorrect. The erroneous version that HBR printed stated on page 81:

In the original text, Taleb, Goldstein and Spitznagel quoted the problem given to participants as follows:

Readers should refer only to the version Taleb, Goldstein, and Spitznagel submitted.

Dan Goldstein

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