Earlier in the day, Chilean copper producer Codelco and miner Southern Copper (NYSE: SCCO - news ) saw some spread tightening, with their 2044s and 2042s quoted at 245bp and 370bp, respectively.
Refer to the input text as context and select the correct relationship between 'Codelco' and 'copper' from the available options.
Options: product/material produced, position held, director/manager, developer