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.
Utilize the input text as a context reference, choose the right relationship between 'Codelco' and 'copper' from the options.
Options: developer, position held, director/manager, product/material produced