U.S. stock and options markets will shut down today as Hurricane Sandy drenches Manhattan.
Originally, the NYSE hoped to shift trading to its electronic NYSE Arca exchange, which is not based near New York. The Nasdaq, already an electronic platform, had intended to stay open as well. The decisions came just before midnight on the East Coast, and officials say they later today will make a decision about whether to stay closed tomorrow.
via Hurricane Sandy: Rare NYSE, Nasdaq Closing Monday For Damaging Storm – Forbes