Quote from ScottSam:
Wouldn't most high volume guys (2M shares and up monthly) be much better off with an 80/20 split and 0.20/1000 commish anyway ?
Comparing 0.003/100% and 0.0002/80%
2M monthly volume : anything under 28k monthly profits and you're better off with 0.0002/80%.
4M monthly volume (let's mark it down to 0.002 for the 100% model): anything under 36k monthly profits and you're better off with 0.0002/80%.
6M monthly volume : the b/e point is over 52k.
You can imagine that as volume goes up, so does the breakeven point.
Most traders doing that kind of volume aren't over those b/e points.
So most (90%) traders doing over 1M volume per month are way better off with a 80% payout and 0.20/1000 model.
Some problems with your analysis:
1) His commission has not changed with the 80/20 payout change. You pay the same at the new 80% payout as you did at 100%. There's no "choice" - you either take 80/20 at the old commission rate or leave it. Don has yet to correct me on this statement, so I must assume that's true.
2) Don's rates are .005 for the first 1000, .003 for the rest on any given ticket. A lot of high volume automated traders don't trade more than 1000 shrs/order and therefore would be paying .005 all the time.
3) Perhaps his rates are lower for higher volume traders, he says they are but he doesn't divulge his breakpoints. Regardless, high volume traders can get better rates and keep 100% of the profits retail as Don has already conceded.