http://www.bloomberg.com/

The biggest mining companies are set to spend about $244 billion on expansions to 2015, slow to heed Glencore Xstrata Plc Chief Executive Officer Ivan Glasenberg’s call for austerity to end an oversupply in mineral markets.

That’s just a 2.4 percent drop from the $250 billion in capital expenditures made in the previous three-year period, according to forecasts compiled by Bloomberg for the 20 largest mining companies by market value. Glasenberg joined a chorus of investors pushing for spending cuts after the companies had to make $60 billion of writedowns over 18 months.

From BHP Billiton Ltd. (BHP), the world’s biggest, to Rio Tinto Group, industry members are telling investors they’ve become more optimistic for demand growth in the U.S. and China, the biggest minerals buyer, and that future capex will be more disciplined. The Bloomberg World Mining index has jumped about 16 percent from a four-year low in July.

“Institutional shareholders still feel that management need to prove to them that over the long term the discipline associated with capital allocation is there,” Catherine Raw, co-manager of BlackRock Inc. (BLK)’s $7 billion World Mining Fund, said yesterday in a phone interview from London. “They could always do more. Shareholders are not releasing the pressure.”

Glasenberg’s own Baar, Switzerland-based Glencore, in which he holds an 8.3 percent stake, estimates spending of $29 billion on new projects over the next three years before outlays drop to $4 billion to $5 billion annually, the company said in May. Spokesmen for Glencore and Rio declined to comment. London-based Rio is looking to cut capital spending 20 percent to about $14 billion this year, with a similar drop the following year.