Who that thinks about this?
You've mentioned the effect first and then the reason while it should be the other way around. Bad news and FUDs are the reasons for the negative effects on the market. There may be some news websites that posts bad news when the market goes down and vice versa. But it is because these websites catch up to the trend a little late when the effect is already present in the market. But if you follow major news websites like CNBC, CNN money, Yahoo Finance etc, you will see a different dynamics of the market.