A lesson in Tennis trading

February 2, 2010

I stumbled across this post on the Bet Angel Blog. It’s a great illustration of how market trading works, and the risk of relying purely on data to predict an outcome.

In the quarter-finals of the recent Australian Open, Roger Federer lost 13 games on the trot to Nikolay Davydenko resulting in his odds to win at Betfair lengthening from 1.3 to around 3.7. He took a break and returned to court a changed man, beating Davydenko with relative ease.

[In a post match interview] Federer commented on how the sun was bothering him and how he couldn’t wait till it had cleared the court. He also, accidentally, revealed how he timed his ‘comfort break’ to allow him a chance to regain his thoughts and break the stride of his opponent.

If you had just been following the score, it’s unlikely you’d have taken such an outside bet on Federer, but if you could tell that the sun was bothering him, you would have made a tidy £27 profit on a £10 bet.

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