Shares of Coupang plunged by more than five percent on Wall Street following a massive data breach at the e-commerce firm.

Coupang shares closed at 26-point-65 U.S. dollars on Monday, down five-point-36 percent from the previous trading day.

Shares were down more than seven percent at one point during intraday trading, ending a five-day rise.

Trading volume more than quadrupled from the previous trading day.

The market response comes as Coupang faces accusations of lax crisis management after announcing that 33-point-seven million customer accounts had been compromised.