While the interest on municipal bonds is tax free, this doesn’t mean gain or loss on the sale of bonds is excludable from gross income. Gain or loss on the sale of municipal bonds is figured in the same way as for any other asset. What’s more, municipal bonds are includible in a decedent’s gross estate for estate tax purposes.
A revenue ruling is the Commissioner’s “official interpretation of the interpretation of the law” and generally is binding on revenue agents and other IRS officials. Taxpayers generally may rely on published revenue rulings in determining the tax treatment of their own transactions that arise out of similar facts and circumstances.