Originally posted by sonatine
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As mentioned in CFTC and SEC (2010b), about 13 minutes prior to the rapid ES de-cline that precipitated the CME market stop on May 6, 2010, a large fundamental traderinitiated a sell order of 75,000 ES contracts. Menkveld and Yueshen (2015) identifies thisfundamental trader as Waddell & Reed Financial, Inc. Both sources report that Waddell& Reed utilized an algorithm to implement the trade without regard to price and time,but with a volume execution target of 9% of trading volume over each previous minute.
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