Is this because traders think the stock has hit a bottom and now the price is cheap?
You asked this question before and I replied and asked you the name of the stock after you said you had done all the research to verify there was
no news.
I then checked to find out there was indeed news that you simply ignored, discounted or just didn't see.
There's also the issue of
social media itself. Someone or group of folks may be drumming up heavy positive interest or negative interest in a stock that has no traditional news events. Simply, although you may have check all your bloomberg news, reuters news, corporate news, Google news or whatever and there's nothing there...don't forget to check social media resources such as twitter, stocktwits, yahoo or other non traditional discussions that showed a large spike (pump) of discussions
prior to the volatility spike that pushed prices upwards or downwards.
The use of social media is a
well known tactic for penny stocks and even used on regularly traded stocks today especially by an organization that has a large subscription for its newsletter in which they give publicity for the stock and their subscribers push the stock higher or lower.
There's also the issue involving correlation when news is about an industry group the stock is within or when there's big news about another stock in your stock's industry group even though your stock had no news. This type of correlation news is very common.
Anyways, I remember many months ago when you started that other thread about a specific Chinese stock that had "no news". That's what I did...I checked several traditional news resources and there was a big non traditional stock discussion (hyping) that occurred online (social media) just before the spike.
Social media and correlation news are very powerful weapons for stocks to get publicity to help push stocks up or down when there's no traditional news specific to your stock especially those stocks that have low liquidity. Actually, its a very smart thing to do by investors but only if they don't do something illegal like trying to spread false news to push stocks up or down...that's illegal and have gotten many folks arrested.