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That last nine in a trading system uptime has exponentially low value unless you have customers who care quite a lot.

Seriously, suppose you have a truly awesome system making $100B per year of revenue. If you unnecessarily shut down 0.1% of the time, that’s only $100M per year lost, and an 0.1% unnecessary shutdown rate seems pretty high.



> That last nine in a trading system uptime has exponentially low value

IME that last 9 is where all the action happens

> unless you have customers who care quite a lot

All customers care about their trades. I’ve worked with these systems. You can’t treat smaller traders as less-than.

> only $100M

How far removed from the problem do you have to be to think one hundred million dollars is not going to effect anyone?


> How far removed from the problem do you have to be to think one hundred million dollars is not going to effect anyone?

If $10b is at risk, $100m is not a lot for an insurance policy.


Not all automated trading systems have customers.




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