The Position Transfer Basis page lets you specify the cost basis for positions transferred into your IB account using ACATS (Automated Customer Account Transfer Service), ATON (Account Transfer Online Notification) or Free of Payment (FOP). Under the FIFO cost basis accounting method, a closing transaction is matched with the cost basis of the earliest transaction in the position to determine realized profit or loss. The FIFO cost basis method is used throughout the US for stocks, security options, single stock futures and Forex.
To specify the position transfer basis for an ACATS, ATONS or FOP transfer