Thinking
Get flash to fully experience Pearltrees
Neuroscience
Psychology
Behavioural Economics
Thinking Styles
Language
Math
Philosophy
Mabel Yu didn’t trust the numbers. It was 2006 and Yu was an analyst with The Vanguard Group, a financial firm based in Malvern, Pennsylvania, that manages almost $1 trillion in investment funds. Bond sellers were trying to convince her to buy a new financial security backed by huge bundles of home mortgages. They assured her these bonds were risk free; after all, Moody’s and Standard & Poors had graded them “AAA,” the highest rating. But to Yu, the data made no sense. “There was nothing to support those ratings,” she says.
