Nicolas Samaran, the former head of investment content at exchange traded products (ETPs) provider Source, has joined Invesco Powershares as head of product development in London. Samaran will have responsibility for product-line design, including researching, developing and project managing new product ideas and product line changes. In his new role, Samaran reports to Bryon Lake, head of Invesco PowerShares - Europe, Middle East and Africa (EMEA). Samaran, a seasoned derivatives structurer,