Nvidia stock drops 18% in two weeks amid AI, semiconductor concerns

Computer systems that perform tasks that normally require human intelligence, such as understanding language, recognising images or making decisions.

AI is changing work, media and public services, raising questions about jobs, safety and regulation.

A material, usually silicon, used to make the chips that process and store information in electronic devices.

Chips power everything from phones to cars, so their supply has become a strategic issue for governments.

A digital currency secured by cryptography and recorded on a blockchain, without a central bank issuing it.

Crypto prices are volatile, and governments are still deciding how to regulate it.