S. Datta et Me. Iskandardatta, DOES INSIDER TRADING HAVE INFORMATION-CONTENT FOR THE BOND MARKET, Journal of banking & finance, 20(3), 1996, pp. 555-575
This study documents that there is significant information content in
stock trading by registered corporate insiders for the bond market. We
report significant positive price reactions for convertible and strai
ght bonds in response to the Wall Street Journal's Insider Trading Spo
tlight publication of insider buy transactions and significant negativ
e reactions for insider sell transactions. The stock market response t
o the publication of the insider transactions, although weaker than th
e bond market reaction, is also found to be significant. Cross-section
al results suggest that bond market participants extract the quality o
f the insider-trading signal by observing factors such as the dollar v
olume of the trade, the percentage change in the holding of the inside
r, and the insider's position in the firm. Lower-rated (riskier) bonds
are found to be more sensitive to the information than higher-rated i
ssues. The empirical evidence presented in this paper suggests that th
e absence of any reporting requirement for insider bond transactions m
ay create an enhanced opportunity for the insiders to exploit private
information to expropriate wealth from uninformed bond traders.