COLUMN-Copper market focus shifts back to unpredictable supply: Andy Home

(Repeats Jan. 20 story with no changes to text. The opinions expressed here are those of the author, a columnist for Reuters.)

By Andy Home

LONDON, Jan 20 (Reuters) - Last year it was the strength of demand that caught the copper market by surprise.

Everyone had braced themselves for an expected hard metallic landing in China, the driver of global copper usage.

But that's not how things played out.

China itself, it seems, was not quite ready for the promised shift from the old model of fixed asset investment to what was touted as the "new normal" of slower, more consumer-oriented growth.

Infrastructure and property investment boomed again, as did the country's appetite for copper. Imports of both unwrought copper and mined concentrate probably hit record highs last year, judging by the preliminary figures released last week.

As for the supply side of the pricing equation, the biggest surprise was the relative lack of surprises.

The amount of global copper supply lost due to unscheduled production losses was 3.5 percent, compared with the historical norm of around 5-6 percent, according to research from Citi. ("Copper - a possible return to normal mine disruption in 2017", Jan. 10, 2017).

It was, in other words, a year of collectively good performance by the world's producers.

Can they keep it up this year against an expected backdrop of much slower, if not flat, mined supply growth?

Judging by the production guidance given by Rio Tinto , the answer would appear to be no.

The company, which has stakes in some of the world's biggest mines, expects to produce between 525,000 and 665,000 tonnes of mined copper this year, compared with actual output of 523,000 tonnes in 2016.

That's a wide range, wide enough in fact to encompass many analysts' global market balance calculations for the coming year.

Rio has given no further details but its own production uncertainty speaks to the potential for a more "normal" year, to quote Citi, in terms of mine supply disruption.

INDONESIAN UNCERTAINTY

One contributor to Rio's "mind-the-gap" production guidance may well be the Grasberg mine in Indonesia.

Export shipments from Grasberg are again suspended as the mine's majority owner and operator, Freeport McMoRan, navigates yet another rewrite of Indonesia's resource rules.

An existing requirement to build a copper smelter within five years has been supplemented with a proposed shift to a new operating permit and the need to sell a 51-percent stake to local investors.

A new export licence should be possible while talks are continuing but as of right now it's still sitting in the mining ministry's in-tray.