Are a growing number of top executives choosing to take advantage of a rule that allows them to sell their company’s stock on a regularly scheduled basis? It sure seems this way; in November alone, executives at nearly one dozen companies said they will take advantage of Securities and Exchange Commission rule 10b1-5.

But experts note that the rule is not a new one. “The rule is four years old,” points out David Sakowitz, partner with Winston & Strawn. “I wouldn’t expect a surge recently. The rules haven’t changed.”