All Systems, from Victor Niederhoffer
All systems that move tend to devolve to a structure and shape that increases the current through it. Thus, when a contract changes from June to September like SPU today, there is a increase in volatility and fearfulness to induce those who are long one to switch to the other, especially if they are long so that they can't get out of their positions without an extra curren(T)cy to the top feeders.