“Washington dealt a double blow Thursday to JPMorgan Chase as a Senate report accused its iconic chief executive of hiding information about a massive loss from regulators while the Federal Reserve unexpectedly said it had found a ‘weakness’ in the bank’s capital plans.  The report takes the bank to task for hiding losses for three months last year, overstating the value of its trading positions and ignoring red flags. When regulators grew concerned, JPMorgan withheld information about the nature of the portfolio, Senate investigators say.”