My biggest takeaway from this chart is that I don't buy into the supposed safety of the iShares 20+ Year Treasury Bond Fund ( TLT ) . You can buy them at a hefty discount right now… 2 Cheap Income Generators to Buy Today But MUB and TLT aren't the best ways to play this game. When it comes to ultra-safe US-issued bonds, I think the volatility in TLT and the inevitability of stronger inflation in the near term make it a bad choice.