The commission month usually ends a few days or a week before the 30/31 and is payable in the middle of the next month.
As with all commission salesmen and make no mistake, your financial guy is a salesman, the end of the month means it's time to do business.
As you can imagine, the end of month comes all too quickly and everyone has bills to pay, your financial guy hopes that he can bring in some new money to save the month and bring home the bacon but if not, you know what happens next - you get the call to make a move within your account (which of course creates commissions, concessions or fees).
Brokerage firms report massive increases in phone usage and costs near the end of the month. Sales managers have contests and incentives for placing product near the end of the month. Mutual fund wholesalers working with your financial guy provide increased commissions over short periods, usually near the end of the month.
What are the chances that the best time for you to invest or change investment are coincidentally near the end of the month? None. Fiduciary responsibility will take a back seat to increased commissions every time.
Check the calendar next time you get the call and beware!