If this is about dollar strength (solid economy, raising FED, lira/Euro-dolllar/Brexit queasiness -- even TenCent take-down) -- a thesis I find entirely realistic, then we'd indeed see what we have today -- a big, calm, dump-down, with solid volume, and a TRIN camped at an entirely bearish 1.99. AND you'd have this pop in vol -- 16+, 17+, even the VIX9D 18.0 I spied around 11am ET.
To me, then, while the *trigger* here was geopolitical Trumpidian econo-angst, the follow-on selling is freeing of cash -- perhaps as its primary agenda.
Andt THIS, to me, sez that things will continue into tomorrow, and perhaps well over another half-a-percent down. How much gets sold?? Dunno -- if I'd been following the sectors more, I'd have an opinion, but...
That's my take on the thesis. I think that makes it a hypothesis. Or a metathesis. Yeah.