it depends on the news and the timing of it. also it depends on the market itself too.
for example bitcoin market is a lot bigger than any altcoin market so the new effect on bitcoin is not the same as the effects on altcoins. a simple news can push an altcoin up or down a lot more than it can bitcoin's price.
also the reality of the news and the history of the effects of such news can make a difference. for example when an exchange is hacked there will be panic but also speculators expecting a price drop so the price WILL drop. or when a shitcoin is listed on a big exchange it creates hype but also speculators know in the past it has led to price rise so they buy it and price WILL rise.