For over three decades, indexing has become increasingly accepted by both institutional and individual investors. Index benchmarks and investment products that track them have been a driving force in the transformation of investment strategy from art to science. Yet investors' understanding of the sophistication of this burgeoning field has lagged the growing use of index products. Active Index Investing is the definitive guide to how indexes are constructed, how index-based portfolios are managed, and how the world's most sophisticated inves…