Barclays Global Investors has appointed Karen Prooth, previously a managing director at JPMorgan Asset Management, as managing director and European chief operating officer for iShares, the company’s exchange-traded funds business, and GIMG (Global Index and Markets Group), which covers a number of businesses from equity index products to securities lending. She will be responsible for coordinating the operations, technology and finance functions for the businesses and reports to Rory Tobin, chief executive of iShares and GIMG Europe.