Factbox: History of extended New York Stock Exchange market closings

(Reuters) - With state and local governments across the United States taking steps to contain the coronavirus spread, including requiring the closing of schools, restaurants and other meeting places, questions have begun to swirl on whether stock markets will shutter.

On Thursday, CBOE Global Markets CBOE.Z said it would suspend open-outcry trading and move to an electronic-only mode until further notice as a precautionary measure.

On Friday, the NYSE, which is owned by Intercontinental Exchange Inc ICE.N, issued a trader alert that it aims to keep its equity and options trading floors open "in the days and weeks ahead," even as it asked its staff at 11 Wall Street, not needed to support floor trading, to work from home amid coronavirus concerns.

For its part, the Nasdaq NDAQ.O issued a statement on Sunday that all electronic Nasdaq-operated equities, options, and fixed income markets will remain in operation and Nasdaq PHLX Options trading floor in Philadelphia will temporarily close on Tuesday as it moves to an electronic-only environment.

From the government perspective, U.S. markets should stay open despite the intense volatility, said Securities and Exchange Commission Chair Jay Clayton in a phone interview with CNBC network on Monday.

There have been six extended closings of the NYSE of at least one day or more since 1885, a person at the exchange confirmed. Below is a list and the reason for each.

March 12-13, 1888 - Blizzard of 1888

July 31-Nov 27, 1914 - Pending start of WWI

July 14, 1977 - New York City blackout

Sept, 27, 1985 - Hurricane Gloria

Sept 11-14, 2001 - Attack on World Trade Center

Oct 29-30, 2012 - Hurricane Sandy

Reporting by Chuck Mikolajczak in New York; Editing by Alden Bentley and Matthew Lewis