An Investigation of Trades That Move the BBO Using Strings

We investigate the common movement and information content of trades at steps away from the best bid and offer (BBO) using Tokyo Stock Exchange data. We create strings, a series of trades at the same or at an inferior price. The number of the strings is invariant for securities across trading days. The number of shares traded during a string and the time needed for the completion of a string are also significantly related across days for a given stock. The strings represent liquidity beyond the BBO. In addition, the strings characterize the price adjustment process in which we relate to the information on the underlying asset value. The strings measure order aggressiveness beyond the BBO. Finally, we show that the return for the strings is significantly related to the state of the limit order book at the start of the string. Thus, traders can infer information using strings to achieve higher returns.