What is the relationship between Jamie Dimon and Chief Executive Officer in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

At Barclays Global Financial Services Conference in New York, JPMorgan Chase & Co. ’s JPM Chief Executive Officer Jamie Dimon forecasted a decline in trading revenues for the current quarter.

Answer: position_held