Something interesting about trading I normally only put in orders that expire at the end of the day but recently I had buy order in that was good till the end of the week. It never got filled and then I noticed that the limit price was lowered by $0.03 and my first thought was that my account got hacked. Changed my password and then sent a message asking if they would have changed the bid. As it turns out, if you have a bid in that crosses the ex-dividend date they lower the bid by the amount of the dividend being paid.
Not sure if other companies do this but thought I would share.
GLTA