In this respect, I must stress that the Basle Committee, as illustrated by the new Capital Accord, is encouraging banks to use more sophisticated and accurate risk measurements techniques. In addition, supervisors might help –and obviously they are already helping- to spread the idea that financial institutions should round out their current range of risk management tools to include extensive use of stress testing. This technique offers a better reflection of the varying situations of institutions and of the diverse perceptions that institutions have of exceptional events. The application of stress testing techniques and their results are thus inherently more diversified than those resulting from methods based on the value-at-risk approach. These are only examples of options to help improve the functioning of markets. There is probably some merit in an overall review of regulatory, accounting and tax rules and regulations, as well as of codes of good conduct and good practices, and of structural developments of market themselves, to identify possible amendments and improvements that could help protect and enhance the behavioural and conceptual diversity of modern financial markets. In conclusion, let me stress the important role played by central banks in preserving monetary and financial stability in an increasingly globalised world. The recent years have shown the benefits of monetary stability in terms of growth in a globalised world. It is of course closely linked to central bank’s independence, which is no longer a matter of debate.

Experience suggests that asset price cycles continue to be very substantial In the last two decades market forces have indeed tended to cause misalignments between equilibrium and actual asset prices. Stock markets in particular have experienced this phenomenon. But in foreign exchange markets as well, prices have also a tendency to diverge substantially from their “equilibrium level”, although those divergences have been contained through fruitful G7 co-operation during the last 15 years. In addition, some markets have seen an increase in volatility and frequent volatility peaks. Although cyclical moves should be clearly distinguished from volatility, the latter may in some circumstances exceed what can be considered optimal, making the price determination mechanism less efficient and thus contributing to misalignments. Moreover, as demonstrated by a number of financial crises during the last two decades, contagion among countries and across financial markets has been frequent. As a result, investors have faced asset price fluctuations that might be more synchronised than before. Lastly, the connections between credit, asset price and business cycles have tended to amplify cyclical swings. Credit, in particular, is playing an important role in asset price fluctuations. Observed in particular during the “speculative bubbles” of the 1980s and early 1990s, this trend has persisted. Another example is provided by boom-bust cycles in asset prices which have often been associated with sharp economic contractions. Several factors are in play when financial asset prices experience amplified moves I shall give a few examples.