Unadjusted flow from BEA, BOP, Table 8a Transactions in Long-term Securities, line A4, Stocks, net purchases by U.S. residents, with sign reversed. Beginning 2006:Q1, level from BEA, IIP, Table 2, line 21, Corporate stocks. Prior to 2006:Q1, IIP level is only available for year-end; level for other quarters is estimated by the FR Board, International Finance division. Data for the most recent ten years show no significant seasonality.