Where did you see the "volume" ... pre market , or Europe?
Buy low , Sell high ... means that when BigMoney wants to sell, they drive the price up.
The situation in Europe is more "informed" , in that one expects a massive move into stocks due to MIS-trust in the Euro paper currency due to the ECB's illegal ( or call it "ESM pre-emptive" ) buying up Govt. Junk .... i.e. buy any stock paper that seems low.
DAF just said this effectively on Deutsche Anleger Fernsehen - German Investor TV :
Die Währungsreform kommt
Dr. Ulrich Horstmann daf.fm
http://www.youtube.com/watch?v=Sb_vjhR0GfM