The anomalies, inefficiencies and difficulties in the market for catastrophic bonds are so pronounced as to lead strongly to the inference that psychological factors have a major impact on the pricing of these bonds, and on the lack of acceptance they have encountered from investors. In this article, we examine major factors influencing the market for catastrophe bonds. Most of the economic factors involved-considered either singly or in combination-are insufficient to account for the magnitude of the anomalies observed. Decades ago, irregularities in the orbit of the planet Uranus allowed astronomers to deduce the existence of another planet, subsequently named Pluto. Since the economic forces at work in the marketplace cannot satisfactorily explain the situation in the catastrophe-bond marketplace, we infer that the gravitational pull of psychological forces is at work. We discuss eight psychological dynamics that may influence the pricing, mispricing, acceptance or lack of acceptance of catastrophe bonds. Losses from catastrophic events represent an increasing problem for the property and casualty insurance industry. These losses have significant repercussions not only for insurance firms, but also for governmental policy makers and consumers in the insurance market. In principle, one way to deal with these risks is through securitizing them. Doing so would allow spreading risks of local disasters across global capital markets. However, previous attempts at securitizing insurance risks have, by most accounts, met with minimal success. This paper examines possible barriers to securitization, focusing on behavioral responses to such novel instruments. These barriers include the difficulties of conveying the associated risks, even to investors who are sophisticated about finance. Our analyses will draw on research in behavioral decision making and psychology. They will lead to proposals for empirical research and general strategies for making securities design more consonant with investor behavior.