Abstract In the context of a search model of asset trading with adverse selection, we demonstrate that trading of a financial asset will seize, when its average quality drops sufficiently. A large player, however, can establish trading again, if he removes a sufficiently large quantity of bad assets which involves assuming losses. Most importantly, we show that such a player does not have to
... [Show full abstract] intervene immediately: a mere announcement today of intervening at a later point in time can cause markets to function continuously, even after a drop in the quality of assets. We characterize when immediate intervention is necessary for continuous markets and when it is indeed optimal. Finally, we intend to study the trade-off between the size and the timing of the intervention. The views expressed in this paper are not necessarily the views of the Bank of Canada.