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![]() TWEEDY, BROWNE COMPANY L.P. United Kingdom: The Impact of Insider Accumulation Mervin King and Aisla Roell from London School of Economics examined the relationship between overall market returns and returns on U.K. stocks which had been purchased by a company's own officers and directors. The study sample consisted of companies reported in the weekly "Shares Stakes" section of The Financial Times between January 1986 and August 1987 in which an open market purchase had been made by a company insider. The study assumed that the same number of shares which had been purchased by an insider were acquired for the "Buy" portfolio at the stock price on the day of publication. The investment returns in excess of The Financial Times-Actuaries All Share Index were computed over periods of one month, three months and one year following the publication date. Table 27 shows the results. Table 27: Investment Returns Above the Market Index on United Kingdom Stocks Purchased by Insiders, January 1986 through August 1987
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