Using return series with various differencing intervals that are as short as half-hour and as long as two weeks, I investigate the short-term volatility accentuation in five equity markets: the Nasdaq Stock Market and the New York Stock Exchange in the US, and the London Stock Exchange, Deutsche Boerse and Euronext Paris in Europe. Results confirm an intra-day reverse J-shaped pattern of half-hour volatility in these markets. In addition, I find evidence of an intra-week pattern in volatility with higher volatility on Monday opening periods and Friday closing periods. The evidence also...
Using return series with various differencing intervals that are as short as half-hour and as long as two weeks, I investigate the short-term volatili...
