| Good afternoon, US President Donald Trump’s debt pile increases risks for a big shock to markets, writes Roger Montgomery. Nvidia has shaken off fears that China’s low-cost DeepSeek artificial intelligence model would scuttle its business, with its powerful chips in more demand than ever. That's great news for James Packer and Telstra. The working week of chief executives are rarely defined, but big investors have taken aim at the Tesla boss Elon Musk for going missing, writes Eric Johnston. | 