Patent ID: 8214274

Claim:
A computerized method of offering for purchase, positions predicting the location of occurrence and level of severity of a future natural event resulting from a substantially continuous ongoing natural process culminating in the future natural event, comprising: a computer configured to contain a database including: 1) a map of geographical areas corresponding to the positions to be offered for purchase; 2) ongoing current severity of the substantially continuous ongoing natural process; 3) strike probabilities of future natural events for the geographical areas; and 4) offer prices for purchasing positions predicting future natural events in respective geographical areas, that are based at least in part on respective strike probabilities and the level of severity of the future natural event; the computer configured to provide a graphical user interface to display the map in the graphical user interface, with user selectable portions corresponding to the geographical areas of the map; during the substantially continuous ongoing natural process, the computer configured to electronically obtain updated data providing the basis for electronic calculations of strike probabilities of a future natural event for the geographical areas and updated current level of severity of the substantially continuous ongoing natural process; and the computer configured to electronically make an offer price available to prospective purchasers, wherein the offer price is electronically updated in substantially real time so as to be based at least in part on an updated strike probability and an updated current level of severity of the continuous ongoing natural process, for purchasing a position predicting the occurrence and level of severity of the future natural event in a selected geographical area that is selected by the user.