The arb generates more overall volume and basically becomes a multiplier until the Market decides that the edge is smaller than the cost of doing business on two platforms. Right now the Arb is still creating more volume because there is still edge in it. Soon it will dissipate and the Floor should disapear, but the Exchange can put up some barriers to change. I have seen several Arbers make a move from Arbing to staright Electronic Execution in the last several months. It is starting!
An example of the Exchnage putting up temp barriers is:
As soon as the Bonds and Notes on the CBOT/Ace system hit the 60% level the exchange lowered the Floor fees and raised the Electronic fees substantially. ACE fees went from $.80 to $1.25. You would think that Business logic would necessitate a move in the other direction, so that the CBOT would not have to support 2 cost centers. Not done. The Exchange leadership was put in their by the Members.
The short story is: Don't look for Tick size changes in the near future. IMHO
An example of the Exchnage putting up temp barriers is:
As soon as the Bonds and Notes on the CBOT/Ace system hit the 60% level the exchange lowered the Floor fees and raised the Electronic fees substantially. ACE fees went from $.80 to $1.25. You would think that Business logic would necessitate a move in the other direction, so that the CBOT would not have to support 2 cost centers. Not done. The Exchange leadership was put in their by the Members.
The short story is: Don't look for Tick size changes in the near future. IMHO
Quote from Tea:
If the tick were reduced to .10, traders would save a potential $7.50 on each emini. This would increase the participation in the emini from medium and large hedge funds - making the emini even more liquid.
Since most of the arbitrage seems to be initiated in the emini and exited in the pit (because of the time lag of the pit), it would seem that the pit is taking liquidity away from the emini instead of visa versa. So reducing the tick size should increase emini liquidity, not reduce it IMHO.
The exchange (or should I say the corporation) makes 5 times as much in fees from dollar equivalent Emini as from the pit contract.
From a corporate point of view it would make sense to shift things from the pit to the emini.
The corporation has a fiduciary responsibility to maximize its profits - the profits of individual share holder's businesses is not its primary concern (whether they be pit traders or arbs). Otherwise they could be sued for favoring certain shareholders at the expense of the company and the other shareholders.