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Previous studies have documented the informational role of order imbalances in price discovery of the Treasury market. In this paper, we explore the liquidity dimension of order imbalances. Through our research, we find evidence which indicates that order imbalances affect Treasury market liquidity. More importantly, order imbalances have significant effects on Treasury market returns and volatility, consistent with the contention that order imbalances can cause an inventory problem of marketwide concern. Results suggest that a significant portion of the effect of order imbalances on price and quoted spread is associated with the inventory premium that compensates market participants for providing liquidity to uninformed traders. The effects of order imbalances on market liquidity, returns and volatility are stronger for two- and five-year notes and Treasury bills. Furthermore, there is commonality in order imbalances. Sensitivity of order imbalances individual bonds to marketwide order imbalances varies across securities.

The flow of orders from buyers and sellers, relative to past returns and stock characteristics, was examined in the Chinese stock market. Order imbalance (the gap between buyer- and seller-initiated trades) was found to be negatively related to long term returns. Turn of the calendar year trading provided strong indications of tax-motivated trading as well as support for the flight-to-quality hypothesis, which suggests selling in response to perceived increases in market risk.