1349 GMT - Copper prices remain above $14,000 a ton, with supply-disruption risks limiting the prospect of easing concentrate tightness, ANZ analysts say. Weaker South American mine output, the Democratic Republic of Congo's export ban and El Nino-related disruptions have constrained concentrate availability, keeping treatment and refining charges under pressure. Weak smelter margins are also weighing on refined copper production, particularly in China, while wage negotiations at Chile's Escondida mine pose another supply risk. Although global copper inventories are at multi-year highs, nearly 70% are held in the U.S., tightening availability in other markets, ANZ says. Demand remains resilient, supported by investment in power grids, AI, data centers, electric vehicles and new-energy infrastructure. With the market undersupplied by around 1% of annual demand, the analysts expect prices to find support near $13,500 a ton, with upside potential to $15,000 a ton.