// market has expired
// settle at lower bound
if (block.timestamp > _expiryTime) {
	uint256 _shortPrice = MAX_PRICE - _floorLongPrice;
	_collateralOwed =
		(_floorLongPrice * _longAmount + _shortPrice * _shortAmount) /
		MAX_PRICE;
} else if (_finalLongPrice <= MAX_PRICE) {
	...
} else {
	...
}
