Possibly relevant: http://www.nanex.net/FlashCrash/FlashCrashAnalysis_NBBO.html
On Sat, Aug 21, 2010 at 4:22 PM, Lawrence D'Oliveiro <l...@geek-central.gen.new_zealand> wrote: > In message > <a10be304-96dc-4fb3-bf9f-35652477e...@f20g2000pro.googlegroups.com>, > Raymond > Hettinger wrote: > > > On Aug 21, 2:30 am, Lawrence D'Oliveiro <l...@geek-central.gen.new_zealand > > > > wrote: > > > >> Wasn’t HFT an exacerbating factor in just about every major stockmarket > >> downturn since, oh, 1987? > > > > IMO, it was a mitigating factor. > > HFT firms provide liquidity and help price discovery. > > Investor sentiment is what drives rallys and crashes. > > Someone who doesn’t understand how positive feedback can lead to > instabilities in a dynamical system. > -- > http://mail.python.org/mailman/listinfo/python-list >
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