Turkey’s Capital Markets Board spent Wednesday and Thursday doing two jobs at once. It filed criminal complaints against dozens of people over alleged share-price manipulation, handed two-year trading bans to fund managers at Pusula Portfoy and Tera Portfoy, and then watched police detain four senior figures, among them Pusula chairman Muhammed Yariz and Destek Holding chairman Altunc Kumova. At the same time it tried to talk the market down off a ledge. Those jobs pull against each other. The second is harder than it looks because the first one caused it.