Some of the world's biggest miners have seen their stocks hammered this year amid sinking commodity prices and the fallout from China's economic downturn.
Concerns over Glencore's health were the latest example of problems in the sector, with shares of the Anglo-Swiss giant down 23 percent over the past 30 days.
A report from investment firm Investec last week highlighted the mounting debt pile of mining firms including Glencore as a result of heavy borrowing in the years that followed the global financial crisis. With borrowing costs now rising, miners were feeling the strain and their credit default swaps were spiking, Investec said.
Read More Don't rule out more Glen-gore: Investec
Glencore is expected to pay down debt by selling assets, which could negatively impact earnings. What do you see happening next for commodity companies? Vote in our new poll and share your thoughts.