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.

NEW YORK, Sept 18 (Reuters) - JPMorgan Chase & Co's third-quarter markets revenue is running "about the same as everybody else," Chief Executive Officer Jamie Dimon said on Friday after two major competitors had said their revenues were down about 5 percent from a year earlier.

Answer: position_held