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A "post-event bond" is an alternative vehicle for intertemporal spreading of the risk of catastrophic loss. When a loss occurs, an entity such as a government arranges with those in a pool subject to catastrophic loss to issue a bond with a face amount equal to the amount of the loss. The interest rate and amortization period of the bond are likely to depend on the spot market for credit at the time, the size of the loss, and the pre-existing debt load of the borrower. The proceeds from the bond issue are used to pay the losses of the members of the pool. Someone, perhaps the members of the pool, perhaps taxpayers, perhaps others, or some combination of these then pays to amortize the bonds. This Demonstration simulates for 100 years the finances of an entity that annually issues post-event bonds. Each year, a loss is chosen from a random distribution that you specify. You choose three sets of parameters: (1) loss distribution parameters; (2) credit market parameters; and (3) a visualization preference. The loss distribution parameters involve the family of distributions from which the annual losses are drawn, the mean loss of that distribution and the standard deviation of that distribution. These parameters generate an uncorrelated time series of losses faced by the pool. The credit market parameters are the starting "low risk" base interest rate, the volatility of "low risk" interest rates in the credit market, and the sensitivity of the interest rate the bond issuer must pay to the aggregate outstanding principal balance on its existing bonds. The first two parameters generate a "random walk" of interest rates. This random walk combines with (a) the history of post-event bonds issued by the borrower as a result of events and (b) the sensitivity parameter to determine the set of interest rates the borrower will need to issue on post-event bonds. Generally, the higher the aggregate outstanding principal balance at the time a bond is issued, the lower the borrower's credit rating, and the higher the interest rate it will have to offer investors. The visualization produced by the Demonstration depends on your choice of visualization function. In ... and ... mode two graphs are displayed. The first shows the history of events and related borrowings. The second shows the history of market interest rates and the interest rate on post-event bonds issued. In the top graph, the gold line shows the history of annual losses, the red line shows the history of the outstanding principal balance on all pre-existing bonds, and the blue line shows the annual debt service on the bonds. You choose whether to visualize these values on a conventional or logarithmic scale. In statistics mode, the Demonstration also produces a chart showing the mean, standard deviation, minimum, and maximum of a variety of statistics. You can also obtain these statistics by hovering your mouse over the "statistics here" marker at the bottom of the display in ... and ... mode.
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