JPMorgan Chase's $2 billion blunder not only fanned the fires of tighter bank regulation, it led Monday to the resignation of the bank's chief investment officer, Ina Drew.

By Jennifer S. Altman, for USA TODAY
JPMorgan Chase CEO Jamie Dimon.
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By Jennifer S. Altman, for USA TODAY
JPMorgan Chase CEO Jamie Dimon.
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Those fighting for stricter rules to curb excessive risk-taking by big U.S. banks now have 2 billion more reasons to say, "I told you so."