Keep in mind that long duration low coupon treasury's are the "kryptonite" that have sunk some banks this year. Many funds are loaded with far more of that than banks. Many long term low coupon treasury's are trading at 50-60 cents on the dollar. When a fund is in a forced selling mode, due to redemptions, the loss from the sale of that security is realized and there is no recovery of that security back up to par. That capital is gone forever. Before you put new money into a fund, look for the red flags like a low average coupon relative to current yields or high levels of unrealized losses, and a wide disparity between the reported SEC yield and distribution yields. Don't be led off a cliff with all the other lemmings. Fixed income investing is all about math.