As I have reported recently, it is not unusual for the stock market to have a correction after a lengthy time on the rise. Yesterday we saw that a correction can still be painful. The stock market dropped a little over 2% yesterday, meaning that anyone in the market at that time lost money. Although you are a long-term investor, that is your money. A correction is usually about a 10% drop in the value of stocks. This usually sets the stage for another increase in value.