Quick math for the 8th grader: okay, I buy for 49 cents and sell, like the guy on the subway platform, for a dollar.

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The yanqui dollar is still a hard sell for Latin American politicians.

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The fact that the debt could be converted for a set dollar value of shares added an extra incentive to sell short.

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Still, the sell-off in the dollar value of platinum is worrisome for companies since it comes at a time when costs are escalating for South African producers.

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This raises big questions for companies such as Boeing, which has recently booked a multibillion-dollar deal to sell dozens of F-15 fighters and attack helicopters to Saudi Arabia.

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The idea was that the banks would be able either to sell their shares in GoodCo now, getting perhaps 10 cents for each dollar of their debt, or hold them for a few years in the hope that their value would increase.

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