Quote from version77:
Best idea I have seen yet... but...
1. Would it decrease the daily range compared to now?
There would be no contraction in volatility. ATR could possibly dip by .10pts or so. Obviously there's days the dime increment would contain a high of 1243.90 instead of 1244.00.
2. Would it decrease daily volume compared to now?
Theoretically volume would be cut in half. IMO the reduction in contracts would be more like 35-40%. The facilitation of "in between" trades at the newly created dimes would certainly increase the number of orders both entered and filled each day. And of course any decrease in volume less than 50% would be an actual increase in notional volume.
3. Would it double intraday/overnight margin rates?
Yes. Definitely.
4. Would it have an effect on commissions?
Probably. I'd guess the CME would raise Globex fees and brokerage firms would feel the need to "make up" for the decrease in contract volume by raising commissions. However I'm sure it would still work out where 1 newly created 100x ES would be cheaper to trade than two of the present 50x ES's.
5. Would it wipe out ER2? (Would ER2 traders go back to ES)...
No effect at all on ER2.
ER2 traders are motivated by three factors. One, ER2 is the more volatile index and that appeals to some momentum scalpers. The suggested changes to ES would not increase ES volatility so ER2 will remain the choice of those traders.
Secondly there's a pool of undercapitalized traders who use the additional volatility of ER2 without having to pay the margin premium of 2 ES. Since ES margins would double, the smaller guys would be even less compelled to move back to ES.
Thirdly the Russell has become a bona fide benchmark index for many miudcap portfolio managers. With the decrease in serial correlation between ES and ER2, managers see the need for sector hedging and hedgies LOVE the spread opportunities between all these multiple index products.
What other possible negative/positve effects would this change
have that anyone can think of?