Just when we think we have some idea ... http://www.zerohedge.com/news/2014-12-11/because-usdjpy

With all the 'non volatility' there are billions being made on the daily volatility. These guys have the game all tied up. Just imagine the coin made so far in tis sudden turn on the USD/JPY!

Then we come to the junior pms ... totally controlled. A nimble trader though, could have done well on the swings of 10% to 40% on a lot of juniors ie: GPR in 3 months from 1.37 to 1.01 to 1.24 to .81. and hundreds more ... although the quality ones with cash and cash flow, good business plan, legs, managment etc. are a minority . I would reckon a 'GPR' is one helluva buy at .81 this morning. (MUX; LSG; P; TNX; CNL ... it goes on and on).

Ain't hindsight great!