Systemic Risk Designation Improvement Act of 2013 - Amends the Dodd-Frank Wall Street Reform and Consumer Protection Act to authorize the Financial Stability Oversight Council to determine that a bank holding company shall be subject to enhanced supervision and prudential standards by the Board of Governors of the Federal Reserve System, if the Council makes a final determination that material financial distress at the bank holding company, or the nature, scope, size, scale, concentration, interconnectedness, or mix of its activities, could threaten the financial stability of the United States.

Prescribes an indicator-based measurement approach to be considered by the Council.