By Isabella Zhong

Already battered commodities prices suffered yet another blow as the U.S. dollar soared to its highest level in more than a decade on Friday.

Among the casualties was copper, the ubiquitous base metal that could be found inside electric wires and on circuit boards. As the Wall Street Journal Dollar Index gauged the greenback at its strongest level since 2003 against a basket of 16 other currencies, spot copper prices retreated to $6,309 a tonne, just $3 shy of an almost five year low struck last month. Because copper is denominated in U.S. dollars, a stronger greenback weighs on demand as the commodity becomes more expensive for buyers using other currencies.

However, the appreciating dollar hasn't been the only antagonist for the red metal. With China accounting for almost half of global copper consumption, investors are very focused on economic growth, as well as car and electric tool production, in the world's most populous nation. So news of China's manufacturing activity having plumbed 18 month lows, and just skirting outright contraction, in December only served to further dampen downbeat sentiment towards the metal.

Compounding copper's woes is the expectation that there will be a surplus of copper this year as weaker demand meets growing supply. Given the interplay between supply and demand, it appears copper's tough days could linger for a while. Credit Suisse expects spot prices for the commodity to remain fairly flat over coming years. The broker forecasts an average price of $6,800 a tonne this year, $6,625 a tonne in 2016 and $6,600 a tonne in 2017. A surplus of 100,000 tonnes is expected this year, while oversupply in both refined copper and copper concentrate will worsen in the following two years amid mine starts and expansions. Meanwhile, the near term economic outlook for China and Europe, which accounts for two thirds of global copper demand, appears glum.

The International Copper Study Group, a forum for copper producers and consumers, also expects a surplus of the red metal in 2015, with supply expected to outpace demand for the first time in five years. The ICSG forecast a 2015 surplus of 390,000 tonnes in October, but this was a substantial downward revision from the forecast of a 600,000 tonnes surplus unveiled in April last year.

However, beyond the next three years, a rebound may be in store for copper prices. Australian mining giant BHP Billiton (BHP.AU), one of the world's largest producers of the red metal, points out that declining copper grades at mines will help produce a deficit in supply beyond 2018. Falling copper grades mean supply will decrease if miners are unable to increase the amount of copper ore they process. BHP and Rio Tinto are considering additional investments in processing technology to help offset declining grades at Chile's Escondida mine, the world's largest copper mine.

Despite the downbeat views on copper prices by observers outside the mining industry, many of the world's largest miners are pushing ahead with new copper projects. BHP Billiton and Rio Tinto (RIO.AU) received U.S. government approval in December for a land swap deal that will pave the way for the $6 billion development of the Resolution copper project in Arizona. Resolution is the world's third largest undeveloped copper deposit. BHP is also considering an expansion of its Olympic Dam mine in the state of South Australia, which if approved could see the mine emerge as the world's second largest copper mine.

While lower copper prices may squeeze the profits of copper producers like BHP Billiton and Rio Tinto, it's not bad news for everyone. India, the world's second most populous nation, could stand to benefit. The country could grow to become the world's third largest copper consumer by 2020, overtaking Japan and Germany in coming years, according to the Indian Copper Development Centre. The need to build new electricity networks and railway tracks as the country moves up the economic development scales would be a key source of that demand.

India's automakers could also be beneficiaries of lower copper prices. An average passenger car contains anywhere between 20 kilograms and 50 kilograms of the red metal, according to ABN AMRO Bank. That means low copper prices would be a positive for the sector's production costs.

Tata Motors (500570.IN) was the subject of a bullish stock pick by my colleague Tom Streater late last year. Despite its excellent growth prospects from luxury brands under the Jaguar Land Rover umbrella in coming years, the company trades at a discount to peers.

Currently at around INR510 a share, Tata Motors fetches 7.7 times projected earnings, which compares to an average of 16 times for Indian car makers. Although Tata Motor's share price has slipped slightly since late last year, the upbeat outlook for the stock remains intact. The company's return on equity of 27% is higher than the 25% industry average, while its earnings are expected to grow at 16% versus 14% for peers.

Meanwhile, Barclays analyst Sahil Kedia noted platform consolidation is also delivering cost efficiencies on the shop floor for the company. Kedia, who has an overweight rating on the stock, sees 20% upside for Tata Motors.

Comments? E-mail us at asiaeditors@barrons.com

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