Reactions to Corporate Insider’s Transactions: Do Legal Stock Market Disclosure Rules have an Impact?

Caspar Rose; Nicolai Søpstad

doi:10.1007/s10657-014-9475-7

Reactions to Corporate Insider’s Transactions: Do Legal Stock Market Disclosure Rules have an Impact?

Caspar Rose, Nicolai Søpstad

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

We test the impact on security prices of top manager’s requirement’s to disclose their own share transactions in the firm. Specifically we study whether buy or sales transactions convey relevant information for market participants thereby studying the effects of legal stock market disclosure rules. Based on a comprehensive collection of stock market announcements from Danish CEOs and chairmen we find that insiders’ transactions influence share prices. However, it appears that there is a surprisingly difference, as buy transactions by chairmen have a much higher impact compared to CEO transactions, which to our knowledge have not been noticed already by others. Thus, our event study shows that the Danish stock market seems to be efficient in the semi-strong from.

Original language	English
Journal	European Journal of Law and Economics
Volume	40
Issue number	2
Pages (from-to)	247-272
ISSN	0929-1261
DOIs	https://doi.org/10.1007/s10657-014-9475-7
Publication status	Published - 2015

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@article{600096f09d2e4e8e869df6a3b2851154,

title = "Reactions to Corporate Insider{\textquoteright}s Transactions: Do Legal Stock Market Disclosure Rules have an Impact?",

abstract = "We test the impact on security prices of top manager{\textquoteright}s requirement{\textquoteright}s to disclose their own share transactions in the firm. Specifically we study whether buy or sales transactions convey relevant information for market participants thereby studying the effects of legal stock market disclosure rules. Based on a comprehensive collection of stock market announcements from Danish CEOs and chairmen we find that insiders{\textquoteright} transactions influence share prices. However, it appears that there is a surprisingly difference, as buy transactions by chairmen have a much higher impact compared to CEO transactions, which to our knowledge have not been noticed already by others. Thus, our event study shows that the Danish stock market seems to be efficient in the semi-strong from.",

keywords = "Disclosure rules, Insider{\textquoteright}s transactions, Event study, Signaling and stock market efficiency",

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N2 - We test the impact on security prices of top manager’s requirement’s to disclose their own share transactions in the firm. Specifically we study whether buy or sales transactions convey relevant information for market participants thereby studying the effects of legal stock market disclosure rules. Based on a comprehensive collection of stock market announcements from Danish CEOs and chairmen we find that insiders’ transactions influence share prices. However, it appears that there is a surprisingly difference, as buy transactions by chairmen have a much higher impact compared to CEO transactions, which to our knowledge have not been noticed already by others. Thus, our event study shows that the Danish stock market seems to be efficient in the semi-strong from.

AB - We test the impact on security prices of top manager’s requirement’s to disclose their own share transactions in the firm. Specifically we study whether buy or sales transactions convey relevant information for market participants thereby studying the effects of legal stock market disclosure rules. Based on a comprehensive collection of stock market announcements from Danish CEOs and chairmen we find that insiders’ transactions influence share prices. However, it appears that there is a surprisingly difference, as buy transactions by chairmen have a much higher impact compared to CEO transactions, which to our knowledge have not been noticed already by others. Thus, our event study shows that the Danish stock market seems to be efficient in the semi-strong from.

KW - Disclosure rules

KW - Insider’s transactions

KW - Event study

KW - Signaling and stock market efficiency

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