The Norwegian Government Pension Fund Global was set up in 1990 to manage Norway's petroleum revenues and support the long-term management of the economy. It has two main ethical obligations - to ensure sound financial returns for future generations and to respect the fundamental rights of those affected by its investments. It uses a three-pronged strategy of exercising ownership rights through engagement, negative screening to exclude certain products, and exclusion or observation of companies involved in gross ethics violations. Corruption is one area that can lead to exclusion but also presents challenges in gathering sufficient evidence of being systematic or extensive.