News events in particular cause traders to make incorrect decisions, because they play on emotions. The urge to follow the crowd is normal. It is comforting. And in a strong bull market, it may just be correct.
But in most circumstances, letting emotions push you into making trading decisions costs traders money.
There are two kinds of traders.
1. Those who make emotional decisions based on any of the above.
2. Those who make money off of those who make emotional decisions.