US equity markets have gone nowhere fast since the start of September, coiling in a narrow range and breaking down...(along with bonds as risk-parity funds deliver from record high correlation levels)

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This also coincides with the peak in speculative long positioning in S&P Futures and for the first time since April, large speculators are net short the US equity market.

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Large speculators were short a net position of 2,200 contracts, after staying long for 25 straight weeks, according to the latest data from Commodity Futures Trading Commission. 

In fact, the rate of collapse in sentiment over the last six weeks is the fastest since 2011.