They may use proprietary indexes, which are easy to create but not easy to understand. (thinkadvisor.com)
Both ALFA (0.95 % expense ratio) and GURU (0.75 % expense ratio) have their own proprietary indexes created from top stock holdings of favored hedge funds. (onwallstreet.financial-planning.com)
The Multi-Strategy and Strategic4 Indexes are proprietary indexes of stock performance created by Jackson to add the opportunity for greater diversity. (jackson.com)