Over the past 18 months, base metals have not seen quite the same roaring trade as they have done in previous years. By May 2013, metals such as copper, lead and tin stood at similar price levels to those they were trading at during the beginning of 2012. Investor interest has been lower as a result, while dealers say there has also been a decrease in client hedging activity. Meanwhile, stricter capital requirements and tighter regulation of over-the-counter derivatives have forced some banks to