Online deep-fakery and runs on banks all raise worrying issues over the march of artificial intelligence

Modern banking apps allow savers and investors to move money instantly, making banks vulnerable to those with dark motives

Last October a tweet led to nearly $90bn being withdrawn from Credit Suisse. Stock photo

Paul J Davies and Parmy Olson

Hackers crack the Twitter account of the US news agency Associated Press. They post a tweet: “Two explosions at the White House, the president is injured.” The S&P 500 share index drops 1pc.