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...Order imbalance liquidity and market returns tarun chordia richard roll avanidhar subrahmanyam april contacts voice fax e mail bus emory edu rroll anderson ucla asubrahm address goizueta business school university atlanta ga los angeles ca this paper owes a significant debt to charles lee mark ready for developing the trade signing algorithm helpful comments we owe of gratitude an anonymous referee hank bessembinder jeff busee clifton green paul irvine jonathan karpoff olivier ledoit ross valkanov sunil wahal abstract traditionally volume has provided link between trading activity focus on hitherto unexplored but intuitive measure aggregate daily new york stock exchange signed imbalances increase decrease following declines rises which reveals that investors are contrarians in either direction excess buy or sell orders reduce wide strongly affected by contemporaneous lagged reverse themselves after high negative large return days magnitude reversal is partially predictable from level e...