When the CME came out with the E-mini ES contract, the pit was against it. So the management threw the pit a bone making the ES contract with a .25 point tick increment (1 point equaling $50). The pit contract continued to trade in .10 increments. This allows them to have easy arbitrage opportunities.
So, ES does not trade in .25 increments because that is the way traders want it - it is because the CME decided to throw a political bone to the pit traders to quiet them down on their opposition to electronic trading. A .10 increment would equal $5 in the emini if instituted it versus the current .25 increment equaling $12.50.
A smaller increment saves electronic traders money getting in and out of trades.
So, ES does not trade in .25 increments because that is the way traders want it - it is because the CME decided to throw a political bone to the pit traders to quiet them down on their opposition to electronic trading. A .10 increment would equal $5 in the emini if instituted it versus the current .25 increment equaling $12.50.
A smaller increment saves electronic traders money getting in and out of trades.
Quote from brownsfan019:
Why the argument that the ES should be a .10? I've read that here before, but I like the $12.50/tick. Are you suggesting changing the ES to .10 increments, similar to when the NQ moved from .5 to .25? What's the reasoning? Obviously the ES is the most liquid and popular market, so that would imply that the traders like it the way it is. Maybe the YM could learn something...
The priority for change at the CME is as follows, in this order: