Xstrata-Glencore merger will create mining giant

News of a merger between mining firm Xstrata and commodities trader Glencore has been given a mixed reception by investors.

Standard Life and Schroders - both big shareholders in Xstrata - say the deal undervalues their shares.

The £56bn merger will create one of the biggest mining businesses in the world, with a dominant position in many metals markets.

The BBC's Jeremy Howell looks at why the deal is so significant.

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