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Re: Hi speed trading - hi speed monitoring
From: Paul Graydon <paul () paulgraydon co uk>
Date: Fri, 17 Feb 2012 08:55:11 -1000

On 02/17/2012 08:36 AM, Valdis.Kletnieks () vt edu wrote:
On Fri, 17 Feb 2012 13:01:36 EST, Rodrick Brown said:
Trades today in the equity markets must be within the national best bid, best
offer price range or companies can be fined by the SEC which is why latency
an jitter can be problematic in financial networks.
Am I the only one who thinks that if network jitter can make you fall outside
the acceptable price window, maybe, just maybe,  the market is just too damned
volatile for its own good?
https://www.google.com/finance?client=ob&q=NASDAQ:AAPL <https://www.google.com/finance?client=ob&q=NASDAQ:AAPL>

See what happened on Wednesday with Apple's stock. With no good cause it looks like various parties started to try and short it. You can see the initial result from 12pm->1pm, the 'quick buck' 1pm-1:30pm rise, then the start of some more shorting at which point you can see the pattern emerge where the automatic trading algorithms started doing their thing. Definitely too volatile.

Paul


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