Authors: Albert J. Menkveld, Asani Sarkar,
and Michel van der Wel

Customer order flow correlates with permanent price changes in equity and non-equity markets. We examine macro news events in the thirty-year Treasury futures market to identify causality from customer flow to risk-free rates. We remove the positive feedback trading effect and establish that, in the fifteen minutes subsequent to the news, intermediaries rely on customer orders to determine a substantial part of the announcement’s effect on risk-free rates—about one-third relative to the instantaneous effect. Intermediaries appear to benefit from privately observing informed customers, since their own-account trade profitability correlates with access to customer flow, controlling for volatility, competition, and the macro “surprise.”