Numerous studies have documented abnormal returns available to investors around index changes. S&P 500 index fund managers face competitive pressures to replicate the index as close as possible or risk the loss of investors to competing funds. As a result, these fund managers have incentive to...

Imagine, if you can, an index that requires dynamic reweighting of the portfolio, based on the continuously changing capitalization weights of the index's securities. You would need a computer generated trading system, obviously, and a patent to protect it. The authors now have both, having had...

Andrew Lo in his book, Adaptive Markets, advocates an investment product that he names a “dynamic index.” He has facilitated the operation of a variant of this dynamic indexation, “dynamic allocation,” by founding a company, AlphaSimplex. Another dynamic investment is GMO’s Benchmark...

If a bidder launches a takeover offer for a listed company being part of a stock market index, then index funds and exchange traded funds (ETF) as shareholders of this company cannot easily tender their shares without losing track of the index. This paper analyzes the impact of index fund and...

Corporate America today is astonishingly beholden to three large financial institutions: BlackRock, Vanguard, and State Street Global Advisors. As investors have moved their money into low cost, highly-diversified investment vehicles known as index funds, the so-called “Big Three”...