Utilize the input text as a context reference, choose the right relationship between Glencore and Mining 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.

Mining and trading giant Glencore saw its London-listed shares fall 30 percent on Monday to record lows, while its Hong Kong stock slumped 27 percent on Tuesday, amid growing investor concerns over its debt levels.

Answer: industry