zero coupon bonds

A peculiar bond exchange-traded fund (ETF) doubled the returns of the S&P 500 over the last month. The PIMCO 25 Year Zero Coupon U.S. Treasury Index ETF (NYSE:ZROZ) surged 19.4% from Nov. 1 to Dec. 1, outshining the SPDR S&P 500 ETF Trust (NYSE:SPY), which posted a 9.9% gain. ZROZ invests...