CTA sell programs were launched when the S&P hit 2763, flooding the market with $32.8B notional for sale, reducing CTAs from “+100% Max Long” down to "+65% Long"
http://www.zerohedge.com/news/2018-12-04/here-what-triggered-todays-sudden-stock-liquidation
Wouldn't it be nice if HUMANS traded the markets again????

Realist - Everybody in America is soft, and hates conflict. The cure for this, both in politics and social life, is the same -- hardihood. Give them raw truth.