FIELD: automatic permanent-option deals on various markets such as commodity and stock exchanges. SUBSTANCE: device and method are meant for use of definite assets in making permanent-option deals. User having video display is invited to enter data on definite assets, type of option, execution price, current price, difference in price of assets during quotation time, and required guarantee payment for given assets. These data may be also obtained from data source and stored in future on data medium. These data are used in option deal data calculations for dealing with permanent option. EFFECT: provision for time-independent deals using permanent options. 15 cl, 17 dwg, 2 tbl
