As Wall Street continues to question why its business is declining, a recent Financial Industry Regulatory Authority (FINRA) arbitration case provides part of the answer. The arbitration panel ordered Bank of America Merrill Lynch (Merrill Lynch) to pay $1.38 million to an investor who lost money in a complex structured product composed of pooled loans that were sliced into tranches with varying payouts and risks. While the basic claim doesn’t sound particularly egregious, the underlying facts were.