ou might look at it this way. One computer running a "head line reading" algo just went to full sell on a headline in the Baghdad Times that MDS was going to sell his US securities.
That sell ticked off one momentum algo.
The 9000 computer engineers just hired by Goldman at the same time gave their super algo quantum fast computer a test run. Inadvertently, this set off the balance of the army of momentum computers letting go all the world algos on the sell side.
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