Mumbai, Sept. 18 -- Copper is trying to stabilize around one week low as China's central bank left its key interest rate unaltered on Thursday following US Federal Reserve's decision to reduce rates yesterday. The People's Bank of China (PBOC) left the seven-day reverse repo rate unchanged at 1.40%. Copper had dipped around 1.30% in last session and currently quotes at $4.62 per pound, down 0.30% on the day. Meanwhile, in Asia, China's Shanghai Composite index fell 1.15%. Hong Kong's Hang Seng index lost 1.35% after heavy gains in last session. Japan's Nikkei index added 1.15%. European stocks gained with German DAX soaring around 1.20%. US stocks saw volatile movement following the Federal Reserve's monetary policy announcement. The While ...