Researchers at Cambridge university have found a strong statistical link between the profitability of male traders at a London bank and the ratio of index to ring fingers on their right hand. The longer the fourth digit in relation to the second, the more money the traders are likely to make.
This ratio, known as “2D:4D”, is affected by the amount of male hormone to which people are exposed while growing in their mother's womb.
Previous research has shown that higher prenatal exposure to testosterone and other male hormones leads to a lower 2D:4D ratio. Finger ratios have been used to predict performance in competitive sports.
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