In this study, we analyze the annual returns, returns fluctuation and the day of the week effect for five stock markets in Southeast of Asia (Indonesia, Malaysia, Philippine, Singapore and Thailand) from 31, December 2007 to 31, December 2011. Non-parametric tests and parametric test are used for equality of variance returns and equality of mean returns on the daily returns of the week. Graphical representation of indexes annual changes and their correlation were explored to employ this analysis. The results indicate that all of the indexes experienced high negative changes in 2008 and after this decline, market index growth enormously. Especially Indonesia experienced the highest increase. There was generally high volatility of returns. The results of the Levene's test of the equality of standard deviations of

This study examined the network topology of international foreign exchange markets from 2009 to 2012 in terms of European sovereign debt crisis by using the minimum spanning tree (MST) approach. In the process, the time series evolution is analyzed in relation to the structure changes of MSTs during the crisis period. By deriving some notable changes in network feature, we compare their properties for two subdivided period of currency crisis.