Even though Treasuries have gotten bounced around quite a bit over the past few years, they remain one of the best long-term risk-off assets. Save for a couple of brief periods, there hasn’t been high demand for safe haven trades. Covered call strategies, however, have been in demand. The iShares 20+ Year Treasury Bond BuyWrite Strategy ETF (TLTW) has been able to deliver huge yields up to this point, but total returns have been mixed.