"In the first half of 2018, the CAT bond market saw strong growth even after unequivocally the worst period for CAT bond investors in the market’s 20-year history. Led primarily by losses from Hurricanes Irma, Harvey, and Maria, 19 separate CAT bond tranches were triggered in the third quarter of 2017, leaving as much as $1.4 billion in outstanding issuance vulnerable to losses (the actual loss amount is not yet known given that many insurance claims still need to be resolved). Despite the historic level of losses at the end of 2017, new CAT bond issuance in the first half of 2018 reached $9.4 billion, rivaling 2017’s record start.20 Currently, the insurance industry is working to improve CAT bond modeling to cover new types of risk—such as cyberattack and terror risks. So, it appears that the uses of CAT bonds will continue to grow, offering issuers new avenues to transfer a variety of risks."For a previous post on CAT bonds, see "The Allure of Catastrophe Bonds" (August 25, 2016).