JPMorgan’s Blunder Doesn’t Mean U.S. Should Bust Up Banks

JPMorgan Chase & Co.’s colossal $3 billion-and-counting trading blunder has breathed new life into long-simmering calls to break up big U.S. banks. We agree they’ve become too concentrated, too complex and too unwieldy to effectively regulate or manage, but there are better solutions than asking bureaucrats to take them apart.