20080929 FT - FTfm - Directors dealings database proves valuable.pdf
http://www.inside-analytics.com/
Concept: Insiders are intimate with the company they work for, thus their trades factor in all information (public & private). After washing out boring annual buy/sells and other life event based trades, its is understandable that insider trades would be a good predictor of direction, and have a degree of reliability.
Description of logic from weekly top ten (http://www.inside-analytics.com/2008-09-29-Weekly-Top-10-EN.html)
"About directors (corporate insiders):
Typically, directors (insiders) buy on weakness and sell on strength. Empirical evidence shows that directors' purchases tend to outperform the market while directors' sells tend to slightly underperform the market. Under certain circumstances, purchases or sells can lead to a strong price reaction. Directors' deals potentially convey private information to the market that has not already been discounted. In order to evaluate the conviction behind these transactions, 2iQ Research recommends to check the value of the trade, the hierarchical position of the insider, other dealings within the company, and also the news-flow."

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