However, at their origin, these institutions were created precisely to deal with the financial instability caused by frequent bank runs in the late 19th and early 20th century. Furthermore, the concern for price stability was even institutionalized later on around the world, with the inflation-targeting regime being the latest stage of its development. It is important to review jointly the issues of price stability and financial stability, because here the well-known Tinbergen principle is clearly present. This principle indicates that, to achieve a certain number of objectives, at least an equal number of instruments are needed. We often have used this argument when asked to achieve inflationary, output and exchange rate objectives with only one instrument, that is, the interest rate. Although several objectives can and do coincide with an instrument fairly frequently, there is no reason why they should. For instance, during a period of declining inflation, an expansionary monetary policy could be justified, which could trigger an excessive credit expansion, asset price bubbles and, hence, introduce vulnerabilities into the financial system. If the monetary authority decides to fight the credit expansion with a high interest rate, it may end up reducing inflation excessively incurring in unnecessary costs in terms of employment. Here a new instrument is in order, namely, financial regulation. About these issues I want to talk today. Price stability: inflation targets The regime adopted in Chile and in a number of other countries with low and stable inflation to pursue the price stability objective, is that of flexible inflation targeting.
It is necessary to continue strengthening the robustness of these methods to evaluate situations of extreme tension. Starting tomorrow, the Central Bank of Chile will hold its Annual Conference, and this version will feature frontier work in this area. From the regulatory standpoint, supervision must consider the macroeconomic impact of financial activity. In the months to come, we will have to analyze also the potential procyclicality of the Basel II capital requirements, as well as the modeling and quantification of liquidity risk. A regulatory framework will be necessary to ensure the building of sufficient reserves in the boom phase of the cycle in order for the financial system to be well capitalized when the bust phase comes. 9 One of the most recurring sources of financial stress in the past few years in emerging economies are periods of euphoria or pessimism, which trigger movements in their exchange rates beyond what their fundamentals would justify. For example, when economic expectations are good, foreign exchange appreciations can arise with symptoms of bubbles in favor of all the domestic assets. As I discussed before, a first line of defense for specific asset prices, stocks or housing is to raise the interest rate. However, in the area of exchange rates this may trigger more pressures to appreciate and exacerbate financial imbalances.