Ann: Change of Director's Interest Notice , page-6

A stronger correlation between Director buying and SP rising, than Director selling and SP falling. In fact, it is inconclusive for the relationship between Director selling and SP falling.

Sure, during the last days of Enron, those criminals sold their shares despite encouraging their workers to buy more Enron shares.

I don't think the level of sale, so far, is not significant enough for us to over-analyse. Directors have their own private agendas and entitled to change their portfolios.

Besides, if you are in for the long haul, these things should not matter too much.