Utilize the input text as a context reference, choose the right relationship between Jamie Dimon and Chief Executive Officer from the options. Options: 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.
position_held