389The global financial crisis caused economic cycles in most European countries to become more strongly synchronized without increasing of the real convergence process. While there is a wide range of literature focused on the economic cycle synchronization within the Euro area, the developments since the crisis have not yet been researched in detail. The point is to filter the country-specific economic activity in order to eliminate this global symmetric shock from the time series. We apply the singular value decomposition to estimate the long-term trend in time series and the wavelet co-spectrum to identify the changes of co-movements at different frequencies over time.From the theoretical point of view, a currency union is expected to increase trade and financial integration because of the decrease in transaction costs and the elimination of the exchange rate risk. Frankel and Rose (1998) argued that the business cycles synchronization would be higher because of the demand shocks or the intra-industry trade. As well, they pioneered the idea of the hypothesis of the endogeneity of the Optimum Currency Area (OCA) criteria sig nificant relation between the historically greater integration and the more highly synchronized cycles.The endogeneity of the OCA criteria was discussed by many authors in several branches, which are not isolated between themselves. Zhang (1997, 1999) identified the positive impact of the fixed exchange rate on the business cycles synchronization, contributed by growing trade links between the EU countries. The endogeneity of symmetric shocks and trade was followed by Fontagné (1999), Fidrmuc (2004, Artis et al. (2008) and many others. Blanchard and Wolfers (2000) focused on the endogeneity of labour market institutions, Kalemli-Ozcan et al. (2003) provide the empirical evidence that the risk sharing within the Euro area enhances specialization in production.The hypothesis assumes that the EU accessing countries would be expected to meet the OCA criteria better ex post than ex ante, which is an important topic in discussion about the benefits and costs of adopting a common currency. Joining a currency area is related with the loss of autonomous monetary policy and the exchange rate control. The traditional version of the OCA theory argues that joining costs are minimized and the benefits maximized with a high degree of cyclical and structural synchronization (Corden 1972).However, the recent financial crisis confirmed the Lucas Critique. Lucas (1976) assumed that the structure of all econometric models is not applicable for We provide the wavelet analysis of the economic cycle synchronization during the recent fi nancial crisis. However, the global fi nancial crisis caused economic cycles in most European countries to become more strongly synchronized without increasing of the real convergence process. Our contribution is an application of the singular value decomposition to identify and remove the long-term trend including outliers appearing in the year 2007-2010. We found that the his...