The amount of debt held by data centres is measured in the tens of billions of pounds.
The Federal Bureau of Investigation (FBI) says North Korea was responsible for the hack.
If the accusations are true, the record-making heist shows how powerful suspected North Korean hackers have become.
The cyber-attack, which the company describes as complex, is believed to be the largest ever of its kind.
Shares in Intel continue to fall while the tech-heavy Nasdaq opens at its lowest level in more than two months.
Guardian columnist, senior economics commentator and host of the new Radical Thinking podcast Aditya Chakrabortty answer...
Cyber correspondent Joe Tidy explains more about what is suspected to be the biggest hack in history.
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