If your TWS settings are set to "Average Cost" instead of "Statement Cost", then the TWS may not always correctly update the average price when an asset you hold goes through a corporate action, a position is opened through multiple trades, or a position is transferred into your account. Your statements, which are the official record of your account, will always show the correct cost basis. Those who have their TWS set to "Average Cost" may update the average price shown in TWS to reflect the official cost basis reported on your statements:
- At the top of TWS, click on the Account menu and choose Account Window.
- In the Account Window, scroll down to the Portfolio section.
- Right-click the position and choose Adjust Average Price.
- Edit the Average Price. Please note that although the Position value is grayed out, you should still be able to adjust the average price
- Click OK.
Find more information on adjusting the average price in TWS in our Users' Guide.
Please Note: it is not possible to update your average price using IBKR Mobile at this time.
In some cases, clients are allowed to rectify the official cost basis of transferred securities in the Activity Statements. For additional information, see: