Bad investment habits
are the norm, not the exception. They include panicking and bailing out at generational market lows, like what too many did in 2009. Conversely, the same people often buy aggressively into market bubbles, like the technology debacle at the turn of this century.
Often these behaviours are the result of conditioned responses. We can have both good and bad investment habits. The key takeaway is understanding how they are created.
In his excellent book, The Power of Habit, Charles Duhigg explains why we continue to do self-destructive things. According to Duhigg, there are three components to forming a habit: cue, routine and reward.