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by forgotusername
5060 days ago
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I'd love to know what qualifies you to throw a word like incompetence around here. My best guess is the reason it took 45 minutes to shut it off was due to a judgement call: burn through free cash, or take out all their customers too. Bear in mind some of the largest retail brokerages in the world hang off Knight. Their primary functions are acting as an order destination and a market-maker, for efficiency's sake an obvious conclusion would be that both functions are combined in the same software (in a market where microseconds matter). So given the choice of taking a cash hit (a potentially short term affair), or a reputation hit (a much longer term and most likely fatal affair), it's entirely possible Knight knowingly made the right decision. It's worth note that the eventual deficit amounts to somewhere in the region of one year's net income, hardly insurmountable (and how many investment opportunities promise close to 100% return in a single year?). Listening to the CEO on Bloomberg, it was clear that minimizing damage to customers was their primary goal (he made this point several times in the 5 minute interview), and that he appeared comfortable with the outcome. |
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But I think you are right that they tried to avoid an outage. The incompetence, if any, is that they apparently did not know how much money they were losing and still kept the system going. It wasn't a caclulated risk but rather an incaculable one.
I imagine it's not easy to know how much you're losing at any moment in time. They certainly knew they were building huge positions, but knowing how much they were going to lose on those positions requires an estimate of the price at which the positions can be closed (or a hedge).
What I cannot imagine is that it is common practice to leave this kind of decision to an individual's judgement call. There have to be rules for a situation like this. And there's only one sensible rule for a rogue algo racking up unknowable losses. Kill it and deal with the consequences later. Anything else is negligent.