The main objective of this study is investigating the relevance of momentum and liquidity market status on short-term (6 and 12 months), medium-term (24 months) and long-term (60 months) periods. Statistical sample in clouded 270 firms that were accepted during years 82-85 in Tehran Stock Exchange, and are still working. The results showed that liquidity market status is a factor for separation of the market's effects on excess returns in different  periods of times. So that the momentum in the companies with high liquidity in 6 months formation and 6 & 12 months holding periods was positive, and the momentum in the companies with low liquidity in 24 & 60  months holding periods was negative. Also there was no significant difference between the profitability of momentum strategy in the companies with high and low liquidity.