A man walks past a company logo outside a closed exchange centre of the Fanya Metal Exchange in downtown Kunming, Yunnan province, China, September 22, 2015. Hundreds of investors gathered outside the headquarters of China's securities watchdog on Monday to protest against a metals exchange in a southwest province they accuse of defrauding them of billions of yuan. The Fanya Metal Exchange, located in the city of Kunming in Yunnan province and authorised by the local government, trades 14 minor and rare metals, including indium, bismuth, tungsten, antimony and cobalt. REUTERS/Stringer 

Models stand by a ICC Purios Ultra HD television at a Sharp news conference during the Consumer Electronics Show (CES) in Las Vegas January 7, 2013. Seen in the background are new Aquos 8-Series televisions and a 90-inch LED Smart 3D TV (far left). Sharp introduced new television technology and devices made with IGZO technology (Indium gallium zinc oxide) which promises ultra-high screen resolution with very low power usage. REUTERS/Steve Marcus (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

A model holds a Sharp IGZO Tablet Aquos Pad at their news conference during the Consumer Electronics Show (CES) in Las Vegas January 7, 2013. Sharp introduced new television technology and devices made with IGZO technology (Indium gallium zinc oxide) which promises ultra-high screen resolution with very low power usage. REUTERS/Steve Marcus (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

Jim Sanduski, Vice President of strategic product marketing for Sharp Electronics, speaks in front of an ICC Purios Ultra HD television at their news conference during the Consumer Electronics Show (CES) in Las Vegas January 7, 2013. Sharp introduced new television technology and devices made with IGZO technology (Indium gallium zinc oxide) which promises ultra-high screen resolution with very low power usage. The TV is expected to ship in the summer of 2013. REUTERS/Steve Marcus (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

John Herrington, president of Sharp Electronics Marketing Company of America, introduces the new Aquos 8-Series televisions at their news conference during the Consumer Electronics Show (CES) in Las Vegas January 7, 2013. Sharp introduced new television technology and devices made with IGZO technology (Indium gallium zinc oxide) which promises ultra-high screen resolution with very low power usage. REUTERS/Steve Marcus (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

James Clappin, president of Corning Glass Technologies Group, speaks at their news conference during the Consumer Electronics Show (CES) in Las Vegas January 7, 2013. Sharp introduced new television technology and devices made with IGZO technology (Indium gallium zinc oxide) which promises ultra-high screen resolution with very low power usage. Sharp is using Corning Lotus Glass with their IGZO devices. REUTERS/Steve Marcus (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

Jim Sanduski, Vice President of Strategic Product Marketing for Sharp Electronics, speaks in front of an Ultra HD television at their news conference during the Consumer Electronics Show (CES) in Las Vegas January 7, 2013. Sharp introduced new television technology and devices made with IGZO technology (Indium gallium zinc oxide) which promises ultra-high screen resolution with very low power usage. The TV is expected to ship in the second half of 2013. REUTERS/Steve Marcus (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

John Herrington, President of Sharp Electronics Marketing Company of America, introduces the new Aquos 8-Series televisions at their news conference during the Consumer Electronics Show (CES) in Las Vegas January 7, 2013. Sharp introduced new television technology and devices made with IGZO technology (Indium gallium zinc oxide) which promises ultra-high screen resolution with very low power usage. REUTERS/Steve Marcus (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

Kozo Takahashi, Representative Director and Executive Vice President of Sharp Corporation, speaks at their news conference during the Consumer Electronics Show (CES) in Las Vegas January 7, 2013. Sharp introduced new television technology and devices made with IGZO technology (Indium gallium zinc oxide) which promises ultra-high screen resolution with very low power usage. REUTERS/Steve Marcus (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

Toshi Osawa, CEO and Chairman of Sharp Electronics Marketing Company of America, speaks at their news conference during the Consumer Electronics Show (CES) in Las Vegas January 7, 2013. Sharp introduced new television technology and devices made with IGZO technology (Indium gallium zinc oxide) which promises ultra-high screen resolution with very low power usage. REUTERS/Steve Marcus (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

Toshi Osawa, CEO and chairman of Sharp Electronics Marketing Company of America, speaks at their news conference during the Consumer Electronics Show (CES) in Las Vegas January 7, 2013. Sharp introduced new television technology and devices made with IGZO technology (Indium gallium zinc oxide) which promises ultra-high screen resolution with very low power usage. REUTERS/Steve Marcus (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) 

Indigenous men from Bolivia's north Potosi attend a protest rally in La Paz June 7, 2012. The residents of north Potosi demanded the government of Bolivian President Evo Morales cancel the mining concessions of the Malku Khota company, a subsidiary of the Canadian South American Silver Corporation, which is seeking to extract the silver and indium in the area, local media reported. REUTERS/David Mercado (BOLIVIA - Tags: CIVIL UNREST BUSINESS COMMODITIES POLITICS SOCIETY) 

Indigenous people of Northern Potosi attend a protest rally in La Paz, June 7, 2012. Thousands of residents from North of Potosi demanded President Evo Morales' government to cancel the mining concession for the company Malku Khota, a subsidiary of the Canadian South American Silver, which seeks to exploit silver and indium, reported local media. REUTERS/David Mercado (BOLIVIA - Tags: CIVIL UNREST ENERGY POLITICS) 

A Bolivian indigenous man of Northern Potosi shouts slogans at a protest rally in La Paz, June 7, 2012. Thousands of residents from North of Potosi demanded President Evo Morales' government to cancel the mining concession for the company Malku Khota, a subsidiary of the Canadian South American Silver, which seeks to exploit silver and indium, reported local media. REUTERS/David Mercado (BOLIVIA - Tags: CIVIL UNREST ENERGY POLITICS) 

A Bolivian indigenous man of Northern Potosi attends a protest in La Paz, June 7, 2012. Thousands of residents from North of Potosi demanded President Evo Morales' government to cancel the mining concession for the company Malku Khota, a subsidiary of the Canadian South American Silver, which seeks to exploit silver and indium, reported local media. REUTERS/David Mercado (BOLIVIA - Tags: CIVIL UNREST ENERGY POLITICS) 

A Bolivian indigenous man of Northern Potosi attends a protest in La Paz, June 7, 2012. Thousands of residents from North of Potosi demanded President Evo Morales government to cancel the mining concession for the company Malku Khota, a subsidiary of the Canadian South American Silver which seeks to exploit silver and indium, reported local media. REUTERS/David Mercado (BOLIVIA - Tags: CIVIL UNREST ENERGY POLITICS) 

Bolivia's indigenous leader Leonardo Montano (C) speaks at the entrance of the vice president's office, where negotiations were held between government and community members of the Northern Potosi region, in La Paz, June 7, 2012. Demonstrators demanded President Evo Morales' government to the cancel the mining concession for the company Malku Khota, a subsidiary of the Canadian South American Silver who seek to exploit silver and indium, reported local media. REUTERS/David Mercado (BOLIVIA - Tags: CIVIL UNREST ENERGY POLITICS CRIME LAW) 

Indigenous people of Northern Potosi attack a riot policeman during a protest at the entrance of the vice president's office, where negotiations were held between government and community members of the region, in La Paz, June 7, 2012. Demonstrators demanded President Evo Morales' government to the cancel the mining concession for the company Malku Khota, a subsidiary of the Canadian South American Silver, who seek to exploit silver and indium, reported local media. REUTERS/David Mercado (BOLIVIA - Tags: CIVIL UNREST ENERGY POLITICS CRIME LAW TPX IMAGES OF THE DAY) 

Indigenous people of Northern Potosi fight a riot policeman during a protest at the entrance of the vice president's office, where negotiations were held between government and community members of the region, in La Paz, June 7, 2012. Demonstrators demanded President Evo Morales' government to the cancel the mining concession for the company Malku Khota, a subsidiary of the Canadian South American Silver who seek to exploit silver and indium, reported local media. REUTERS/David Mercado (BOLIVIA - Tags: CIVIL UNREST ENERGY POLITICS CRIME LAW) 

Indigenous people of Bolivia's Northern Potosi fight riot police at the entrance of the the vice president's office, where negotiations were held between government and community members of the region, in La Paz, June 7, 2012. Demonstrators demanded President Evo Morales' government to the cancel the mining concession for the company Malku Khota, a subsidiary of the Canadian South American Silver who seek to exploit silver and indium, reported local media. REUTERS/David Mercado (BOLIVIA - Tags: CIVIL UNREST ENERGY POLITICS CRIME LAW) 

Indigenous people of Northern Potosi fight riot police at the entrance of the the vice president's office, where negotiations were held between government and community members of the region, in La Paz, June 7, 2012. Demonstrators demanded President Evo Morales' government to the cancel the mining concession for the company Malku Khota, a subsidiary of the Canadian South American Silver who seek to exploit silver and indium, reported local media. REUTERS/David Mercado (BOLIVIA - Tags: CIVIL UNREST ENERGY POLITICS CRIME LAW) 

A sales clerk adjusts used liquid crystal (LCD) displays for computers at a store in Tokyo Fenruary 8, 2007. Indium is used to make indium tin oxide (ITO), a thin film applied to the glass used in LCD televisions and computer flat screens. Japan will be able satisfy its robust appetite for indium -- despite falling exports from global top producer China -- by drawing on additional supplies from South Korea and through recycling, industry sources said. REUTERS/Issei Kato (JAPAN)