"Planned selling" by insiders - what you need to know
Insiders file a form 144 to request intent to sell shares. Here is the exact verbage of the form:
"The Form 144 is filed with the Securities and Exchange Commission to reflect the intention of any holder of restricted stock to sell those shares. After the 144 is mailed to the S.E.C., the filer is permitted to sell the shares, or any fraction of them, within 90 days."
In any event. the point is two fold on insider trading. 1. Shares to be sold are not "pre-determined" months in advance....if an exec wants to sell, the form is filed and usually within a 2days they can sell (with electronic exchange now) 2. Once they file the form, they can sell anytime (up to their broker) - as long as it's within 90days of filing.
Bottom line. insider trading is very liquid and is not planned out way in advance. why do you think so many of them sold so quickly right when the down turn was happening.