Level from SEC tabulation of submissions of FOCUS and FOGS reports, Statement of Financial Condition, Liabilities and Ownership Equity, Payable to brokers or dealers and clearing organizations (sum of series F1490, F1500, F1510, F1520, F1530, F1540, F1550, F1560, and F1570). Unadjusted flow is the change in the level; data for the most recent ten years show no significant seasonality.