[diablo272]

This is a fascinating discussion. I've always wondered: how do you learn about things like this besides working at a firm that uses this kind of software?

[Copycat]

Some serious speculation going on here:

Daily Kos: State of the Nation

Summary:
Goldman Sachs may just possibly have used security access codes and built a system to acquire trading information PRIOR to transaction_commit time points at NYSE.

The profitability of this split-second information advantage would have been and could have been extraordinary. Observed yielding profits at $100,000,000 a day.


But I'm a layman, can't verify anything of it.

[BlowFish]

Interesting find copycat. A couple of different ideas how the advantage might be gained.