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In High-Stakes Stock Trading, Finger Length Matters
Study finds testosterone exposure in womb creates long ring finger, financial success
By Alan Mozes, HealthDay Reporter, MSN.com/HealthDay News, January 12, 2009

For all those whose ring finger far outstretches their index finger, British researchers have pinpointed the perfect job: high-volume stock trader.

According to a new study, having a relatively long ring finger augurs well for success in those high-stress financial arenas where fast thinking, good reflexes and good old-fashioned guts matter most. A lengthy fourth digit, the authors note, indicates greater exposure to testosterone in the womb, which in turn gives what they call "high-frequency" traders a biological leg up by encouraging the development of the right mix of mental attitude and physical skills for making money in a cutthroat business.

The finding is reported in this week's issue of the Proceedings of the National Academy of Sciences. . . .

The team noted that a reliable marker for high prenatal testosterone exposure is having a fourth finger (ring finger) that is longer than the second finger (index finger), a ratio previously used to predict improved performance in a range of competitive sports. The authors then used this finger size indicator -- known as 2D:4D -- to stack up each trader's financial success with his testosterone exposure while in the womb.

After accounting for both trader age and years of job experience, Coates and his associates concluded that having a relatively long ring finger (meaning more testosterone exposure in the womb) appeared to be equal to experience as a harbinger of greater financial success in high-frequency trading.

They stressed that in other financial arenas, the testosterone effect might not be as central. But in the specific world of high-frequency trading, having a lengthy ring finger relative to the index finger definitely appeared to translate into both higher long-term profitability and a longer period of time in which the person remained in the high-frequency trading field. . . .

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