Riot shares surge on $28B AI lease as Hut 8 sinks on revenue miss

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.

The total money a company earns from selling goods or services before any costs are subtracted.

Revenue growth shows demand for a company's products; profit shows whether it earns money from them.

The first and largest cryptocurrency, created in 2009, with a fixed maximum supply and no central issuer.

Its price swings and adoption by funds and companies make it a bellwether for the whole crypto market.

A facility that houses large numbers of servers and networking equipment to store and process data.

Data centres use large amounts of electricity and water, which makes their location a local and climate issue.