A cascade, not a list of percentages
Treaties sit in programme order and each is offered what the treaties above it did not take. A quota share cedes its share of the whole risk first; a surplus works in lines on the retention that is left; facultative sits on top of whatever is still uncovered. Excess of loss responds per risk or per catastrophe event above an attachment point, with reinstatements and the capacity still standing, and stop loss responds to the aggregate loss ratio. A treaty answers for losses inside its period even after it has expired, because cover follows the date of loss.









