www.itau.com.br / Sede: Sao Paulo, BR
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What would you rather buy: one AAA $1000 bond or one hundred BBB $10 bonds?
Not sure if they're looking for a right answer here. I used probability distribution they gave for each rating notch and calculated two different probabilities: of losing the first dollar, and of losing everything. In the former case, AAA was better; in the latter the BBBs.