Amex Comission.

I am using tiered commissions and I am currently under 300,000 shares for this month.
In the TWS execution report window I noticed this: BUY 82 shares @ 42.26, executed on AMEX for a commission of -$0.18.

I tried to work through this commission, assuming I added liquidity:
AMEX rebate = 82 * -0.0024 = -0.1968
IB Commission = 82 * 0.0035 = 0.2387 => 0.35 (min commission).

So even before adding in finra, pass-though etc. the commission is about $0.16.
So how did I end up with -$0.18? What am I missing?

 

You spent $3400 and worried about a difference of 2 cents????

Is today april fools? I mean I know people like to keep their money expenses in order, but 2 cents?

 

Read it more carefully, the real commission was -$0.18, see the minus this time?

 

A negative commission is a rebate. He's trying to understand how he got credit for the trade instead of having to pay. The difference is not 2 cents.

 

Well even -0.18 credit isn't even worth questioning. Maybe a $1.80

 

If you're still focusing on the monetary aspect of this, you've missed the point.

 

So after all that, nobody knows?