| http://www.w3.org/ns/prov#value | - The S&P/TSX composite index has risen about 6 per cent annually over the past 30 years.On average, there is some sort of market move before announcements, Dr. Sonmez concluded, although she cautioned the analysis does not confirm anything untoward - just that there was an unexpected rise in the target's stock price, relative to other stocks.The shares having abnormal returns before announcements
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