A Dallas investment firm bought a quarter horse this week for a price that sources close to the deal place at just under $10 million. It's a high price, especially for a 24-year-old stallion that is sterile, leaving him virtually without value.

But the horse, High Brow Cat, comes with a semen bank whose value may prove far greater than the purchase price. "It's a big risk," said Darren Blanton, owner of Colt Ventures, the purchaser.

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