TY - JOUR T1 - A Labor of Joy JF - ETFs and Indexing SP - 75 LP - 78 VL - 2005 IS - 1 AU - Robert Wilder Y1 - 2005/09/21 UR - http://guides.pm-research.com/content/2005/1/75.abstract N2 - ETFs are an index-based product. One of the challenges in establishing an ETF is the creation and maintenance of the index. This case study of the WilderHill Clean Energy Index gives some insight into some of the issues that are faced when creating such an index. ER -