You know the numbers by now: the Dow down 7.6 percent, below 8,600. But if you want an idea of how bad things got for the local economy yesterday, consider this: The PMI Group, the 12th largest publicly traded company in the East Bay and the second-largest mortgage insurer in the country, lost almost 40 percent of its value in one hour. No one was spared. Find out how bad it was after the jump. Chevron: down 12.45...
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