“…No assumptions were made about this process except that it has well-defined conditional first and second moments. The conditional means of the return process could include autoregressive terms (Howard & D'Antonio, 1991), cointegration (Kroner & Sultan, 1993) or fractional cointegration (Lien & Tse, 1999) terms, time to maturity effects (Low, Muthuswamy, Sakar, & Terry, 2002), terms reflecting external information (McNew & Fackler, 1994), or even dependences on other futures prices (Neuberger, 1999). Meanwhile, the conditional second moments could include GARCH (Baillie & Myers, 1991) or stochastic volatility (Lien & Wilson, 2001) effects, terms reflecting external information (McNew & Fackler, 1994), or time to maturity effects (Low, Muthuswamy, Sakar, & Terry, 2002).…”