Bloomberg Gadfly

Glencore is the tempting devil sat on mining's shoulder: Gadfly

Uniquely among its peers, Glencore derives a substantial slice of its earnings from trading commodities, rather than producing them.

Copper's art of the deal

The seeds of Tuesday's 4.6 percent copper slump -- the sharpest in almost three years -- were planted in a scarcely noted non-event earlier this month.

Rio Tinto's M&A madness

Some companies are good at takeovers. Rio Tinto Group isn't one of them.