Glencore (Xetra: A1JAGV - news ) and Anglo American (LSE: AAL.L - news ) were the top fallers after Investec (LSE: INVP.L - news ) said the challenging environment for the sector calls into question the equity value of the mining companies.
Refer to the input text as context and select the correct relationship between 'Glencore' and 'mining' from the available options.
Options: business division, founded by, subsidiary, industry