Norway’s $870 billion sovereign wealth fund expanded the list of miners and power producers excluded from its portfolio as it continues to cull its investments of coal-related businesses. After an initial exclusion of 44 companies, 15 more have now been banned, including U.S.-based Alliant Energy Corp. and Westar Energy Inc., Malaysia’s Tenaga Nasional Bhd and Canada’s Emera Inc., according to a statement from Norges Bank Investment Management.