imo, stock market is very conservative world and most of the time, sudden resignation and departure of the officers (CEO, President, COO, CFO, Secretary) will be considered as a bad news but not much for director. (since it’s the difference of the nature of the position)...company’s officers take care the business directly, but not a director....not for a small company, but often director can be appointed and assamp from outside of the company for whatever the reason. (imo)