"The ones that are large, dark or old--they're dead, " he says, watching two pit bulls bounce up and down.

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But, for example, whereas market-risk models can be tested every day as markets bounce up and down, credit-risk models have to be tested over the economic cycle.

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With passenger revenues stagnant, MTRC's bottom line depends a lot on proceeds from the sale of property atop its stations, which tend to bounce up and down.

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And when they do, they bounce up or down, and then what used to be the ceiling becomes the floor.

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Showing supreme confidence, he dummied a pass to Dowling, kicked forward on the left wing and scooped it up on the bounce with his right foot before gleefully touching down.

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