This paper, through constructing new liquid indicator as representative variables which measures microscopic liquidity, and taking the volume as the representative variables of the macro liquid indicators, using Granger causality test of VAR model, variance decomposition method, researches the relationship between liquidity and returns in fuel oil futures market. The results show that fuel oil futures market only exists that the rate of return guides on liquidity, and liquidity is driven by yield, but liquidity has no effect on yield, that is to say,...