Folketrygdfondet chiefs argue that responsible management of fixed income portfolios gives more holistic view of companies. : One of the big challenges we face, both in the financial world and in everyday life, is how to overcome our biases Market bubbles would not happen in a perfect world. But humans are not perfect and our economies are inherently unstable. Two leaders of Norway’s domestically focused sovereign wealth fund have called for more work into the effects of environmental, social and corporate governance (ESG) factors in fixed income management.