Publications
Publications
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- All HBS Web
(95)
- Faculty Publications (17)
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- 2024
- Working Paper
Primary Capital Market Transactions and Index Funds
By: Marco Sammon and Chris Murray
We document the effects of mechanical buying by CRSP-index-tracking funds on post-IPO returns and IPO deal structure. Leveraging a difference-in-differences-style design built on a 2017 CRSP rule change, we find that expected index fund demand leads fast track IPOs to... View Details
- 2024
- Working Paper
Who Clears the Market When Passive Investors Trade?
By: Marco Sammon and John J. Shim
We find that firms are the primary sellers of shares when index funds are net buyers, providing shares at a nearly one-for-one rate. Rather than provide liquidity, most demand-side institutions trade in the same direction as index funds, especially over long horizons.... View Details
- July 2024
- Article
The Passive-Ownership Share Is Double What You Think It Is
By: Alex Chinco and Marco Sammon
Each time a stock gets added to or dropped from a benchmark index, we ask: “How much money would have to be tracking that index to explain the huge spike in rebalancing volume we observe on reconstitution day?” While index funds held 16% of the US stock market in 2021,... View Details
- 2023
- Working Paper
Do Active Funds Do Better in What They Trade?
By: Marco Sammon and John J. Shim
We develop two new, simple measures to quantify active fund decisions at the individual position level. The intuition is to separate passive rebalancing induced by flows and position changes from active rebalancing decisions. We find that additive active rebalancing --... View Details
- 2022
- Working Paper
Why Do Index Funds Have Market Power? Quantifying Frictions in the Index Fund Market
By: Zach Y. Brown, Mark Egan, Jihye Jeon, Chuqing Jin and Alex A. Wu
Index funds are one of the most common ways investors access financial markets and are perceived to be a transparent and low-cost alternative to active investment management. Despite these purported virtues of index fund investing and the introduction of new products... View Details
- 2022
- Article
Pills in a World of Activism and ESG
By: Guhan Subramanian and Caley Petrucci
Easterbrook and Fischel’s The Economic Structure of Corporate Law advances their now famous passivity thesis, which posits that managers should remain passive in the face of an unsolicited tender offer for the company’s shares. Consistent with the broader... View Details
- August 2020 (Revised December 2020)
- Case
Satrix: Competing in the Passive Asset Management Industry in South Africa
By: Mark Egan, Pippa Tubman Armerding and Dilyana Karadzhova Botha
In late 2017, Satrix, one of the largest passive asset management firms in South Africa and a pioneer in the industry since 2000, had to decide its strategy going forward in a market where passive asset management had become increasingly commoditized and... View Details
- July 2020
- Case
Mortgage Backed Securities and the Covid-19 Pandemic
By: Emil N. Siriwardane, Luis M. Viceira and Dean Xu
In April 2020, global financial markets were still reeling as the COVID-19 pandemic spread rapidly across the world. Global equity markets had initially fallen by 30% in response to the pandemic, and high-yield credit markets had dropped by nearly 20%. In contrast,... View Details
- July 2020
- Case
Driving Transformation at the Majid Al Futtaim Group
By: Suraj Srinivasan and Esel Çekin
The case opens with Alain Bejjani, CEO of Majid Al Futtaim (MAF) Holding, anticipating on the Group’s next phase in the multi-year transformation journey and reflecting on the initiatives he implemented to create the Group’s growth-oriented culture. Founded in 1995,... View Details
- January 2019 (Revised February 2020)
- Case
Should a Pension Fund Try to Change the World? Inside GPIF's Embrace of ESG
In the fall of 2018, Hiro Mizuno, the Chief Investment Officer (CIO) of GPIF, the Japanese Government Pension Fund, was reflecting on his efforts to integrate Environmental, Social and Governance (ESG) issues into every aspect of GPIF’s portfolio. His efforts ranged... View Details
- July 2018 (Revised August 2018)
- Case
Project Helios: Harvesting the Sun
By: Mark Egan and E. Scott Mayfield
Aware of the impact that modern society was having on the environment, Ashley Telkes had always tried to be cognizant of her own impact on the environment and to take reasonable steps to mitigate her own effects. Having already implemented a number of passive measures... View Details
- 2015
- Working Paper
Replicating Private Equity with Value Investing, Homemade Leverage, and Hold-to-Maturity Accounting
By: Erik Stafford
Private equity funds tend to select relatively small firms with low EBITDA multiples. Publicly traded equities with these characteristics have high risk-adjusted returns after controlling for common factors typically associated with value stocks. Hold-to-maturity... View Details
- June 2008
- Article
How Are Preferences Revealed?
By: John Beshears, James J. Choi, David Laibson and Brigitte C. Madrian
Revealed preferences are tastes that rationalize an economic agent's observed actions. Normative preferences represent the agent's actual interests. It sometimes makes sense to assume that revealed preferences are identical to normative preferences. But there are many... View Details
- November – December 2007
- Article
Fundamentally Flawed Indexing
By: Andre F. Perold
A new theory of finance is being advanced as providing definitive proof that holding stocks in proportion to their market capitalizations is an inferior investment strategy. The claim is that capitalization weighting necessarily invests more in overvalued stocks and... View Details
- August 2005 (Revised May 2007)
- Case
Partners Healthcare
By: Joshua D. Coval
Focuses on the portfolio allocation decision of a passive fund manager. Provides a setting to study portfolio theory, including mean-variance analysis, the capital market line, and the efficient frontier. View Details
- June 2003 (Revised August 2003)
- Case
Pension Policy at The Boots Company PLC
By: Luis M. Viceira and Akiko M. Mitsui
In early 2000, the trustees of the pension scheme at Boots considered a proposal to move 100% of the pension assets into a bond portfolio, which would be passively managed. The Boots Co. PLC was a leading retailer of cosmetics and toiletries in the United Kingdom, and... View Details
- Forthcoming
- Article
Passive Ownership and Price Informativeness
By: Marco Sammon
I show that passive ownership negatively affects the degree to which stock prices anticipate earnings announcements. Estimates across several research designs imply that the rise in passive ownership over the last 30 years has caused the amount of information... View Details
Keywords: Passive Ownership; ETFs; Market Efficiency; Price; Investment Funds; Stocks; Communication