I don't follow you at all. If the information available to the market is provided at the point the insider executes the "sell" then it is the B trader who prov

I don't follow you at all. If the information available to the market is provided at the point the insider executes the "sell" then it is the B trader who provides his information later, and all the B traders will tend to act nearly at once. In the A scenario, the A traders sell immediately, and act upon receipt of the inside information, rather than react to each other, so the information is furnished to the market gradually by all A traders. Please tell me in more detail what you think of the scenario that I posed, and how it makes the point of the article.