 It's triple tax-free. How should you figure out whether you want to buy this or not? Well, you've got to compute your tax bracket, and that's what's important. You've got to see what your tax bracket is and how it could be effective on it. People in a low bracket probably can do better buying taxable, higher-yielding investments. People in a high bracket may have a benefit of buying this right now, but there's a bit of a monkey wrench thrown in that