Indexation and exchange-traded funds

Daniel Broby

INTRODUCTION

“[We need to know] the difference between what the index is assumed to replicate and what it actually replicates.”

—Leibenstein (1966)

In this chapter, we will explore the fundamentals of indexation, the historical context of index tracking and the different methods used to achieve index replication. The focus will be on ETFs, defined as follows.

Definition 14.1. Exchange-traded funds ETFs are pooled investment vehicles with shares that can be bought or sold throughout the day on an exchange at a market-determined price. Like a mutual fund, an ETF offers investors a proportionate share in a pool of stocks, bonds and other assets.

We will also examine the costs associated with indexation and how fund managers strive to minimise tracking error to create efficient and effective index funds.

As of the end of September 2023, Lipper reports that assets under management in the global ETF industry reached USD9,951.4 billion. Predominantly, these assets, totalling USD7,606.2 billion, were invested in equity ETFs. Following this category, bond ETFs held USD1,929.6 billion, commodities ETFs amounted to USD185.1 billion, alternatives ETFs stood at USD76.5 billion, “other” ETFs

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