What you need to understand is that news does't cause pumps - the pumps are simply timed to coincide with news so that people don't think it's odd and they can rationalise in their minds why the coin is pumping.

Most of teh action is on Bitfinex, using tethers to buy (and tethers arn't real US dollars, they're just another crappy alt) - so there is a bit of fakery going on. Be careful out there people.