NYSE: Preventing COVID-19 outbreak was the priority in reopening trading floor

What she's saying: "Our goal is to prevent an outbreak from occurring, not a single case. It's very possible that we would have a single case on the trading floor because there still is a pandemic," she said.

• Cunningham said the reopening on May 26 was small, and they've since been scaling up, implementing social distancing guidelines and using personal protective equipment as precautions.
• "We want to make sure we have protections in place that can responsibly mitigate that risk of it spreading. ... But we might need to take measures to scale backwards."
• "I am hopeful that we won't need to get to a place where we would need to close the floor, but we certainly are prepared we could do that again and it was a pretty seamless process," she added.

Go deeper: New York Stock Exchange to temporarily close trading floor due to coronavirus

Editor's note: This story has been corrected to reflect that the New York Stock Exchange floor temporarily closed on March 23 to fully electronic trading (not March 12).