"We have taken precautions, increased social distancing, and also have contingency plans—if needed—to trade on a fully electronic basis," the New York Stock Exchange said Tuesday.
The material, which is 10 times blacker than anything produced before, was used to hide a diamond at an art exhibition at the New York Stock Exchange.
"She represents potential, progress and hope but also all the women who have fought for equality before us," said Betty Liu, executive vice chairwoman of the New York Stock Exchange.
The march toward streaming has gathered pace in recent years and the market is now swamped with alternatives—but Spotify remains strong.
It's the biggest U.S. technology IPO since Alibaba in 2014, despite the fact that Snap has never made a profit.
Adding to uncertainty this week will be the rebalancing of Russell indexes, requiring fund managers to rebalance their own portfolios.
Global stocks plunged on Monday, with the Dow making its worst start to a year since 2008.
Upbeat results from Apple could give the market a boost on Wednesday.
The Dow Jones industrial average rose 1.47 percent to 16,284.7.
The Nasdaq composite and S&P 500 both dropped more than 2 percent.
Major indexes fell almost 3 percent.
China's manufacturing sector shrank at its fastest pace in three years.
In August, the S&P lost 6.3 percent, the Dow fell 6.6 percent and the Nasdaq declined 6.9 percent.
The Dow Jones industrial average rose 312.94 points to 15,979.38.
Disney's shares fell to $110.53, a 9.2 percent drop and its largest daily drop in almost seven years.
Apple fell 6.2 percent, Microsoft lost 3.5 and Yahoo shed 2.2 percent.
The Securities and Exchange Commission will review NYSE's investigation and is not ready to rule out a breach.
The market suspended trading in all symbols.