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I am with you, I work in Finance over here in Switzerland and many professional asset managers are quite shocked. They believe a Whale triggered a serious of algo-bots. Who knows? Please also check my blog for some insights (last post). Cheers!

I think they were just overextended, this was one hell of a bull run for stocks. Trump has certainly helped that with his deregulatory agenda. I think they were due a correction, but how much deeper this goes will be interesting to see!