Monetary–financial crises appear in different forms (section 8.1). A stable money requires a set of conditions including the independence of a central bank (section 8.2). The solidity of the banking system is an important condition for financial stability (section 8.3). When a financial crisis arises, it is the role of the IMF to prevent it from spreading into a systemic crisis of the global economy (section 8.4). Some propose to impede and to control international capital flows (section 8.5). The Tobin tax has gained prominence (section 8.6). Finally, approaches to stabilizing the exchange rate are described (sections 8.7 and 8.8).