21.   The Justice Department agrees that corporate insiders cause the most damage.

22.   The SEC often is tipped off by honest corporate insiders.

23.   The Supreme Court will decide whether the federal government can pursue insider-trading charges only against investors who are true corporate insiders.

24.   The widespread sales raise questions among followers of trading by corporate insiders about where the stock market is headed, especially at a time of increased volatility.

25.   They might also take cues from the actions of corporate insiders.