OID does not appear on the monthly statements. OID is reported on the 1099-OID form. Login to your account and click on the Account Status link on the left navigation bar. From the Account Status page, click on Download Account History. Cost basis is the amount you paid to buy a particular stock.
Cost basis includes the amount paid for the stock, and the commission paid on the purchase.
If shares were purchased at NDB, you can locate your cost by reviewing your year-end account statements or by using our historical activity search function. Login to your account and click on the Account Status link on the left navigation bar. From the Account Status page, click on Historical Activity. From the Historical Activity page, you may set the parameters of your search by trades, dates, symbols and type of transactions. Click display to run your search.