Sovereign wealth funds are large savings owned by some countries, often from selling natural resources. They usually invest in foreign assets, but some are now considering investing at home to help with infrastructure. To make sure these funds don't cause problems, it's important to have rules in place. A well-managed fund could improve public investments, but it shouldn't do the same job as other government investment bodies. It's crucial to limit the types of investments the fund can make and be clear about the returns expected. By setting clear guidelines, sovereign wealth funds can be a helpful tool for long-term development finance.