Asian Markets Lose $1.2 Trillion After Thursday's US Bloodbath

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 set of exchanges where shares of public companies are bought and sold.

Market moves reflect investor expectations about companies and the economy, and affect savings and pensions.

A period in which market prices fall substantially, commonly defined as a drop of 20 percent or more from a recent high.

Bear markets often signal economic worries and reduce the value of investments.