Some of the world’s biggest investment banks have been left exposed as a hedge fund collapsed, leaving multi-billion dollar losses in its wake. Archegos Capital Management was a secretive personal wealth fund - we find out why banks like Goldman Sachs, Credit Suisse and Nomura dealt with it. We hear why a European Union ban on palm oil in biofuel has left both Indonesia and Malaysia upset and as Bangladesh celebrates its 50th birthday we ask whether the textile industry will be able to support the country into the future. Plus, we celebrate 30 years of business programmes on the BBC World Service. Business Weekly is presented by Lucy Burton and produced by Matthew Davies.