Feedback trading
研究了在现货美元/欧元外汇市场中，当数据采样频率为1分钟和5分钟时，同期反馈交易会显著增大订单流对价格的影响。
Abstract Order flow has been found to carry information to the market. When assessing how informative order flow is, the VAR methodology is typically employed, using impulse response functions. However, in such analyses, the direction of causality runs explicitly from order flow to asset return. If data are sampled at anything other than at the highest frequencies then any feedback trading may well appear contemporaneous; trading in period t depends on the asset return in that interval. The implications of contemporaneous feedback trading are examined in the spot USD/EUR currency market and we find that when data are sampled at the 1 and 5 minute frequencies, such trading strategies cause the price impact of order flow to be significantly larger than when feedback trading is ruled out. Copyright © 2006 John Wiley & Sons, Ltd.