It looks like a number of other ratio call spreads have taken shape on Yahoo!

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Fortunately, farmers are in better financial shape these days: the debt-to-asset ratio, over 25% in the crisis years of the 1980s, is now closer to 15%, notes Bob Stutzman, of Prudential Agricultural Investments.

ECONOMIST: Farm prices

Looks-wise, the hardware's largely unchanged, aside from the bigger footprint and a screen ratio that appears closer to the iPad competition, rather than the widescreen shape that arrived on RIM's first tablet.

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Even in cultures without access to mass media, the optimum waist-to-hip ratio for women is around 0.7, which corresponds most closely to an hourglass shape, and is linked to fertility.

ECONOMIST: Baby you can drive my genes