In this paper we examine the sectoral demand for U.K. gilt-edged securities. The Tobin-Markowitz model of portfolio choice generates the prediction that asset holdings should be negatively correlated with the own price, and positively correlated with the prices of major substitutes. In contrast, for all the five major groups of U.K. gilt holders, we find evidence consistent with a reverse correlation between the own price and market holdings which we argue arises due to the passive revaluation of existing holdings. We examine the empirical evidence using both cointegration analysis of stock holdings and a dynamic model of net transactions. Copyright 1994 by John Wiley & Sons, Ltd.