Japanese stocks that trade on the New York exchange also plunged.
On the New York exchange, 412 stocks were up and 1,285 down.
About half of that valuation is on the New York exchange.
On the New York exchange, 740 stocks rose and 644 fell.
The exchanges were therefore effectively cut off from the New York exchange.
The positions span several areas at the New York exchange, including its technology and operations groups.
So nostalgia is on sale now at the New York exchange.
At half past seven local time the New York exchanges opened and the real day's work began.
The New York exchange had net income of $101 million last year.
The decision by the New York exchange comes with some conflicts of its own.