Utilize the input text as a context reference, choose the right relationship between eurozone and Euro 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.

The Euro Stoxx 50, which tracks large-cap companies in the eurozone declined 0.52%.

Answer: currency