P. Halpern et J. Rumsey, A NOTE ON MARKET-EFFICIENCY, INSTITUTIONAL PRACTICE, AND ECONOMIC-CONSTRAINTS IN THE EXPERIENCE OF THE CANADIAN BOND MARKET, Journal of banking & finance, 21(1), 1997, pp. 113-123
For many years, Government of Canada bonds with high coupons traded at
much higher yields than those with lower coupons. This apparent marke
t inefficiency virtually disappeared over a short period of time durin
g 1993. Several events occurred in 1993 which relate to the narrowing
of the spread. This paper shows the earlier yield spread to be consist
ent with restrictions on the trading of strip bonds. It also finds it
difficult to defend the hypothesis that the higher yield spread repres
ented unexploited profit opportunities.