PowerShares DB 3x Long 25+ Year Treasury Bond ETN (NYSEArca: LBND)

Year-to-date gain: 84.6%

Comment: LBND takes the 3x or 300% performance of long-term U.S. Treasury bonds with at least 25 years remaining to maturity. The exchange traded note  has capitalized off the unexpected fall in yields this year and rising demand for U.S. debt.