Many people have experienced a rollercoaster ride in the stock market this year, and a major reason for this is their reluctance to take profits when emotions are high. Of course, there's another group who didn't have many opportunities to take profits because almost all their buying operations involved chasing high prices with large positions or trying to buy the dip too early during a major downturn. Most investment losses fall into these two categories. The first type needs to train themselves to subconsciously take profits; the second type should just get out of there—are you trying to be a sucker?