Unadjusted flow from BEA, BOP, Table 8a Transactions in Long-term Securities, line B16, Corporate bonds, net purchases by foreign residents; plus memorandum line 3, U.S. corporate and other bonds purchased by foreign official agencies. Fourth-quarter level is calculated as BEA, IIP, Table 2, line 38, Other foreign assets, Corporate and other bonds; plus line 33, Other foreign official assets; less an unpublished estimate from BEA of foreign official holdings of U.S. stocks. Level for other quarters is obtained by adding flow to preceding level; data for the most recent ten years show no significant seasonality.