Japanese Stocks Crater Almost 600 Points

UPDATE: S&P futures are stalling too now - down 5 points (it seems Japan is more worried about a tech wreck than the US); JPY and Gold are rising and JGB Futures rise to highest in 2 months

For now it appears there is no apparent catalyst (unless someone just got the mother of all taps on the shoulder) but the Nikkei 225 futures just collapsed almost 600 points from the US day-session highs... five days of gains gone in 30 minutes.

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