I hate to say it, but i don't see that much difference between yesterday's human-driven liquidity providers (floor traders) and the machine-driven liquidity providers of today. Except that as a local in the pit, I often possessed exogenous information, yet to be incorporated in the market. Predatory algorithms must rely on their endogenous actions to trigger the desired outcome.

Of course, in my own version of strategic sequential trading, I would often hit bids and lift offers, in search of stops, only not quite as fast or unemotionally. Yet all of this was easily rationalized as our due privilege for the risk incurred while providing liquidity. Ceteris paribas, we did this for the same reason a dog licks his balls… because we could.

Perhaps, if Goldman wasn't Obama's largest campaign contributor, and SEC officials didn't have a quid pro quo for job placement in place with the private sector b&ds and law firms, and the exchanges hadn't gone for-profit, we might not be discussing this topic.





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