jm + stock-markets   3

Why did Apple, Amazon, Google stocks crash to the same price today?
Nasdaq said in a statement that "certain third parties improperly propagated test data that was distributed as part of the normal evening test procedures."

"For July 3, 2017, all production data was completed by 5:16 PM as expected per the early close of the markets," the statement continued. "Any data messages received post 5:16 PM should be deemed as test data and purged from direct data recipient's databases. UTP (Unlisted Trading Privileges) is asking all third parties to revert to Nasdaq Official Closing Prices effective at 5:16 PM."
testing  fail  stock-markets  nasdaq  test-data  test  production  integration-testing  test-in-prod 
11 weeks ago by jm
Groundbreaking Results for High Performance Trading with FPGA and x86 Technologies
The enhancement in performance was achieved by providing a fast-path where trades are executed directly by the FPGA under the control of trigger rules processed by the x86 based functions. The latency is reduced further by two additional techniques in the FPGA – inline parsing and pre-emption. As market data enters the switch, the Ethernet frame is parsed serially as bits arrive, allowing partial information to be extracted and matched before the whole frame has been received. Then, instead of waiting until the end of a potential triggering input packet, pre-emption is used to start sending the overhead part of a response which contains the Ethernet, IP, TCP and FIX headers. This allows completion of an outgoing order almost immediately after the end of the triggering market feed packet.


Insane stuff. (Via Martin Thompson)
via:martin-thompson  insane  speed  low-latency  fpga  fast-path  trading  stock-markets  performance  optimization  ethernet 
october 2013 by jm
Did a denial-of-service attack cause the stock-market "flash crash?"
wonderful; our world's economies are now more networked than ever, and vulnerable to the attacks which that enables. Have we learned nothing from the last few years?
networking  internet  ddos  stock-markets  security  from delicious
june 2010 by jm

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