Seat changes are measured as the absolute difference between seats held immediately before the election and seats held after certification. For newly formed parties that did not contest the prior election, seats gained equals seats won. If the total number of legislative seats changes, the calculation is still based on the net difference in party seats, not proportional representation. If multiple parties tie for the greatest gain/loss, each tied party's market resolves to $1 divided by the number of tied parties. If there are no net changes for any party, both gain and loss markets resolve to No. Seats held by independents who join a party after the election do not count. Delayed or canceled seat results are excluded unless certified before the expiration date. Post-election resignations, deaths, or appointments are not considered. If the election is postponed beyond one year or cancelled entirely, markets resolve to last fair market price.