Authorities are being pressured to close markets amid coronavirus chaos. Here are the 6 times the New York Stock Exchange has closed for an extended period.

· *The coronavirus pandemic has roiled markets and slowed economic growth in the US and abroad. *
· *Calls to close markets have grown amid increased volatility. *
· *Still, authorities including Treasury Secretary Steven Mnuchin have said markets will remain open, though shorter hours are being explored. *
· *Some...