NEW YORK ( TheStreet) -- The Current Yield column in last Saturday's Barron's recapped the action in the bond market from two weeks ago and the impact it had on one bond ETF and a couple of closed-end municipal bond funds. This was instructive as a reminder of what can happen to bond funds when rates go up and worth exploring further.
Barron's reported that during the week of March 12, the yield on the 10-year U.S. Treasury went from 2.03% up to 2.29%. As most investors know, interest rates at various points along the yield curve are at or near all-time lows; certainly well below normal as the Federal Reserve maintains a 0% interest policy in an attempt to spur natural economic demand.
If rates are low, then prices of bonds and bond funds must be high. Prices can remain high for years but for now they are high and the price movements from two weeks ago for bond funds with longer maturity targets give an indication of what to expect when rates do finally begin to normalize.The iShares Barclays 20+ Year Treasury Bond ETF (TLT) dropped 5.05% the week of March 12. The Nuveen Municipal Value Fund (NUV) dropped 5.57% that same week and the PIMCO 25+ Year Zero Coupon US Treasury Index ETF (ZROZ) fell by 8.9%. A general rule of thumb for individual bonds is that the price of a 10-year bond will drop 8% for every 100 basis point increase in interest rates. This doesn't have to matter for an investor because they will get the par value of the bond back at maturity. Obviously bond funds have no par value to return to. TLT shows a trailing yield of 3.48% which means that the 5.05% price drop from two weeks again equates to approximately 1.5 years of interest (technically a bond fund pays dividends). Of course, interest rates could go down from here which would make up some or the entire price drop in the fund. Unless the U.S. has the same fate as Japan awaiting it, lower 10-year rates are very unlikely and it makes sense to expect that the various liquidity program implemented by the Fed will result in higher interest rates making the price declines from two weeks ago a drop in the bucket.
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