For the first 29 years, a 30-year bond works more or less like any other security, and you can short it just like anything else. However, I'm interested in what happens if you want to short it at the 30-year mark exactly. You can't agree in advance to sell the bond at 30 years plus one week, because at that time the bond will no longer exist.
Let's say my prediction is that the market will trust a 30-year bond completely, right up until the final payment at which time the company will go bankrupt and fail to pay. Is there anything I can do to profit from this?