RT Journal Article SR Electronic T1 A Labor of Joy JF ETFs and Indexing FD Institutional Investor Journals SP 75 OP 78 VO 2005 IS 1 A1 Robert Wilder YR 2005 UL http://guides.pm-research.com/content/2005/1/75.abstract AB 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.