Subject: Re: IB Transaction Cost Analysis
One last point is that from my statistics in the past, it was better to buy earlier in the day rather than later.

My experience, anecdotal since I kept no records on this item, was that I got perfectly fine prices when I bought and sold shortly after lunch time, Central Time (a time frame driven by my daily schedule more than anything). "Perfectly fine" for me was usually a price better than the extant market price by a few bucks across the whole order; although a few times I got a worse prices of roughly the same magnitude. This was with TDAmeritrade; now that I've been forced to Schwab by that acquisition, I'll find out whether that's still the case.

Eric Hines