Why/how do some stock prices have large moves (mostly up) when there are no anouncements? Insider traders can't be responsible for the total volume as there is too many trades taking place.
So how do 'normal' traders not privy to such insider information get in on the rise when it is occurring? Is there some sort of scanning software involved that alerts of large price spikes?
An example of this of late is ERH & MEO. No anouncements, but both have had significant upwards movement in their SP in the last week.