Utilize the input text as a context reference, choose the right relationship between Ashmore Group and London 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.

Indeed, significant macroeconomic worries has weighed on the performance of financial services plays like Ashmore Group in recent times, particularly those geared towards developing markets such as the London business.

Answer: headquarters_location