“…The expectations hypothesis of the term structure, which suggests that systems of nonstationary, default-free, interest rates of different maturities should be driven by a common trend in the long run, is one of the two issues. Bradley and Lumpkin (1992), Engsted and Tanggaard (1994), and Hall et al (1992) indicate that US Treasury rates of different maturities are bound together by a single nonstationary common factor. 4 Engsted and Tanggaard examine 2-, 5-and 10-year Treasury bonds, in addition to short-term interest rates, in the US and find that the zero-sum restrictions implied on the cointegrating vector by the expectations hypothesis of the term structure cannot be rejected.…”