it's definitely both - at times one can have total razor sharp clarity and focus when they are positive in things like trend and economic data etc.. and at other times the market shakes and distorts that clarity by switching gears and moving ...
i don't often check news - maybe once a week before rate decisions or several other data releases like non-farm payroll, unemployment and building permits etc. i find that trading the news is a gamble since the market can respond in both up and down ...