Mumbai, Sept. 15 -- COMEX Silver futures continued to outshine last week, testing fresh 14-year highs above $43 per ounce and clocking around 3% spike for the week as a break above $40 per ounce mark held on. Bullish cues from copper and a generally upbeat outlook for bullion counters boosted the white metal amid a frail undertone in the US dollar which lingers around six-week low. Silver currently trades down 0.27% at $42.72 per ounce. Global silver investment remains concentrated in just four countries - the US, India, Germany and Australia - which together account for about 80% of bar and coin demand, according to a new report published by the Silver Institute. It noted that silver's role as both a monetary and industrial metal, alongsid...