On March 17th, 2005, Wilshire Associates released the Wilshire US Style Indexes. The calculation of Wilshire Style Indexes and Wilshire Target Indexes ceased July 31, 2006. Click here to view suggested replacement indexes.

Wilshire’s Style Indexes are benchmarks used to evaluate the performance of active managers. Originally called the Quantum Style Indexes, they were created in 1996 by separating the Wilshire 5000 into four capitalization groups (Large, Small, Mid and Micro), and then dividing the Large, Small and Mid-cap issues by capitalization equally into growth and value indexes. Growth and value are defined by looking at two factors: price-to-book ratio and projected price-to-earnings ratio. The Indexes’ purpose is to help fund sponsors measure the performance of managers relative to their respective investment management style.

Click here for background on various Wilshire index families.