I've been told that banks will release news to sway investors to take action contrary to what they will do. So, a big news article with gloom and doom saying to sell everything is to drive the price down so the banks can scoop up stocks on the cheap. What do you think? https://ca.finance.yahoo.com/news/huge-market-crash-coming-warren-121015499.html
It's pretty common thought amongst most people. Certain banks are pretty widely accepted to be doing it, like Goldman Sachs. An analyst will release a bearish analysis of some company, downgrade them from BUY, to neutral for example, then months later, they'll scoop some up and put the stock rating back where it was.