Page "Insider trading" Paragraph 4

Legal trades by insiders are common, as employees of publicly traded corporations often have stock or stock options.

These trades are made public in the United States through Securities and Exchange Commission filings, mainly Form 4.

Prior to 2001, U. S. law restricted trading such that insiders mainly traded during windows when their inside information was public, such as soon after earnings releases.

SEC Rule 10b5-1 clarified that the prohibition against insider trading does not require proof that an insider actually used material nonpublic information when conducting a trade ; possession of such information alone is sufficient to violate the provision, and the SEC would infer that an insider in possession of material nonpublic information used this information when conducting a trade.

However, SEC Rule 10b5-1 also created for insiders an affirmative defense if the insider can demonstrate that the trades conducted on behalf of the insider were conducted as part of a pre-existing contract or written binding plan for trading in the future.

For example, if an insider expects to retire after a specific period of time and, as part of his or her retirement planning, the insider has adopted a written binding plan to sell a specific amount of the company's stock every month for two years and later comes into possession of material nonpublic information about the company, trades based on the original plan might not constitute prohibited insider trading.