The cost basis of an asset is the original value used for tax purposes, usually the purchase price. You compare the current or sale price of an asset to its cost basis in order to calculate a gain or loss.
You can view information about realized and unrealized gains in your account, by logging in to Folio website. (Folio is your account’s broker-dealer and custodian.) You can find your Folio username on desktop by clicking on “Hi, [your name]” in the top right-hand corner of your Dashboard and then selecting “Accounts” from the dropdown menu. Your Folio username and login information will be on the page under your Investment Account.
Click here to log in to your Folio account. Then you'll click on “Statements and Tax Records.” At the bottom of the page, you should see a section labelled “Unrealized Gains/Losses”, which shows the cost basis for securities you still hold. ”Realized Gains/Losses" shows the cost basis for securities you have sold.