03
Aug
10

Círculos en los Cultivos, por HFT

Nanex tiene breve e interesante estudio sobre un “fenomeno” que ellos llaman Quote Stuffing, pero que se da en secuencias poco convencionales (que no siguen una lógica económica).

As we continue to monitor the markets for evidence of Quote Stuffing and Strange Sequences (Crop Circles), we find that there are dozens if not hundreds of examples to choose from on any given day. As such, this page will be updated often with charts demonstrating this activity.

The common theme with the charts shown on this page is they are obviously all generated in code and are algorithmic. Some demonstrate bizarre price or size cycling, some demonstrate large burst of quotes in extremely short time frames and some will demonstrate both. In most cases these sequences are from a single exchange with no other exchange quoting in the same time frame.

07-12-10
NASDAQ “Ask Mountain”. Symbol IAU. Over 56,000 quotes in 10 seconds, all with same Ask Price and the Ask Size increasing or decreasing by 1 (to almost 40,000!).


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