Glencore is being investigated by Britain's Serious Fraud Office over corruption allegations concerning Zaire (now Democratic Republic of Congo).
The stock fell 9% on the news. This strikes me as an over-reaction.
Any further substantial falls should be treated as buying opportunities.
The basic background
Glencore (GLEN:LN, OTCPK:GLCNF) is one of the world's major commodity traders. Its expertise is in mineral commodities more than anything else, that's where it got its start too. It also has