The Expiry of Lock-In Agreements of UK Ipos: A Look at the Directors' Trading Activity
39 Pages Posted: 14 Jun 2003
Most UK IPOs include lock-in agreements, which prevent the directors and other initial shareholders from selling their shares for a specified period after the IPO. Using a sample of 94 UK IPOs, we analyse their stock performance around the time of expiry of the lock-in agreements. We also look at the volume and pattern of directors' sales before and after the expiry of the lock-in agreement. We find that the average cumulative abnormal return around the lock-in expiry is negative and is significantly different from zero. However, examining stock performance around the lock-in expiry in the UK is not straightforward.
The announcement effect of directors' sales on the stock performance is examined as well. The increase in stock sales by directors in the weeks immediately after the lock-in expiry is substantial. Interestingly and unexpectedly, the sub-sample of the companies that reported directors' sales in the period of interest had lower negative average cumulative abnormal returns, albeit not statistically significant, than the sub-sample of the companies that had no reported sales. Finally, the likelihood of directors' sales occurring around the expiry of the lock-in agreement is investigated.
Keywords: Initial Public Offerings, Lock-in, High-Tech
JEL Classification: G24, G34
Suggested Citation: Suggested Citation