Wall Street's AI heavyweights added a combined half a trillion dollars in stock market value late on Wednesday (Jul 30) after quarterly reports from Microsoft and Meta Platforms showed massive investments in the emerging technology were paying off. In extended trade, Microsoft jumped 8 per cent and Meta surged 9 per cent, with the two Magnificent Seven companies increasing their market values by US$288 billion and US$152 billion, respectively. Dominant AI chipmaker Nvidia, the world's most