While everyone knows that it was two and a half decades of imbecilic monetary policy courtesy of the Monstro [sic] that caused the credit bubble, few things were as much of a direct proximal cause of the market crash as the August 2007 quant collapse. And few indices tracked the obliteration of the M/N quant landscape that followed as well as the HSKAX (below). Well, after two years of painful grinding (for the market neutrals), the HSKAX is back to the same level to which it plunged in that week in early August 2007. What does it mean? Who knows, suffice to say that the market not only stopped working when the quants were all briefly destroyed back in 2007, but it marked the all time high in the S&P. We are now back to those same levels.Only this time instead ot the Market Neutrals providing the traditional market liquidity it is the HFTs, the NYSE DMMs, and the New York Fed. What happens next is anyone's guess.