I believe, but cannot demonstrate, that large quantities of cash are moving into, and out of, equities, as various capital impaired entities need the money. They are being facilitated by their dealers, who provide fuel for overnight gaps via the futures markets. Sheeple, and index funds, provide the necessary liquidity, and said impaired entities acquire the needed capital.
Of course, I'm subscribing to the boiled frog theory too ...
JIMHO, ICBR, YMMV, and other dark stool,
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