US video game retailer Gamestop closed trading 75 percent higher on Monday after investors boosted its shares following a social media post by Keith Patrick Gill, also known as "Roaring Kitty" on X. In this edition, we take a look at why Gamestop was the recipient of a previous social media-fuelled boom in 2020 and what's behind this latest move. Also, OpenAI has launched an updated ChatGPT which includes a hyper-realistic voice assistant.