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- Working Paper
Index Rebalancing and Stock Market Composition: Do Indexes Time the Market?
By: Marco Sammon and John J. Shim
Value-weighted indexes must rebalance in response to stock market composition changes, e.g., issuance, buybacks, and IPOs. In doing so, existing index funds implicitly engage in market timing. Index funds’ long-short rebalancing portfolios have a -3.5% annual return... View Details
- April 2025
- Article
The Disappearing Index Effect
By: Robin Greenwood and Marco Sammon
The abnormal return associated with a stock being added to the S&P 500 has fallen from an average
of 7.4% in the 1990s to 0.3% over the past decade. This has occurred despite a significant increase in the
share of stock market assets linked to the index. A similar... View Details
- 2024
- Working Paper
Climate Solutions, Transition Risk, and Stock Returns
By: Shirley Lu, Edward J. Riedl, Simon Xu and George Serafeim
Using large language models to measure firms' climate solution products and services, we find that high-climate solution firms exhibit lower stock returns and higher market valuation multiples. Their stock prices respond positively to events signaling increased demand... View Details
- 2024
- Working Paper
Categorical Processing in a Complex World
By: Marco Sammon, Thomas Graeber and Christopher Roth
In real-world news environments, quantitative information is rarely presented in isolation; it is characterized through qualitative comparisons with various reference levels. Company earnings, for example, are commonly compared to analyst forecasts, previous earnings,... View Details
- 2024
- Working Paper
Valuing Stocks With Earnings
By: Sebastian Hillenbrand and Odhrain McCarthy
We show that commonly used aggregate earnings are several times as volatile as stock prices
over the last three decades. Movements in the price-earnings ratio are thus entirely explained by
earnings growth and unrelated to future returns. As an alternative to the... View Details
- March 2024 (Revised May 2024)
- Case
Masterpiece for the Masses: The First Art Exchange ARTEX
By: Lauren Cohen, Anastasiya Siroochenko (Siro) and Sophia Pan
Yassir Benjelloun-Touimi, CEO of ARTEX, aspired to marry the world of art and finance. Hoping to promote transparent, fractionalized ownership of renowned artwork, the founder had spent years contemplating the birth of an art stock market. This exchange would allow... View Details
Keywords: Trading; Art Market; Art Fair; Tokenization; Democratization; Exchange Traded Fund; Price Monitoring; Trends And Opportunities; Financial Liquidity; Financial Markets; Arts; Financial Strategy; Initial Public Offering; Investment Return; Technological Innovation; Business Model; Trends; Stocks; Assets; Diversification; Trade; Financial Services Industry; Fine Arts Industry; Paris; France
- 2023
- Working Paper
Flow-Driven ESG Returns
I show that the recent returns to ESG investing are strongly driven by price impact
from flows towards ESG funds. Using data on institutional trades, I estimate the
market’s ability to accommodate the demand of ESG funds, which is given by the
elasticity of... View Details
- 2023
- Working Paper
The Equity Market Implications of the Retail Investment Boom
By: Philippe van der Beck and Coralie Jaunin
This paper quantifies the impact of Robinhood traders on the US equity market. Within a structural model, we estimate retail and institutional demand curves and derive aggregate pricing implications via market clearing. The inelastic nature of institutional demand... View Details
- 2023
- Working Paper
The Optimal Stock Valuation Ratio
By: Sebastian Hillenbrand and Odhrain McCarthy
Trailing price ratios, such as the price-dividend and the price-earnings ratio, scale prices by trailing cash flow measures. They theoretically contain expected returns, yet, their performance in predicting stock market returns is poor. This is because of an omitted... View Details
- September 2023 (Revised January 2024)
- Case
Icahn Enterprises: Ponzi Scheme or Sound Investment
By: Aiyesha Dey, Jonas Heese and James Weber
Icahn Enterprises, a publicly traded limited partnership founded and operated by famed activist investor Carl Icahn, had earned above market returns for over a decade. Between 2018 and early 2023, it had a compound annual return of 31%. Icahn invested in undervalued... View Details
- July 2023 (Revised November 2023)
- Supplement
Equity Restructuring at Dell Technologies: Buy Out, Buy Up, Buy In (B)
By: Stuart C. Gilson and Sarah L. Abbott
Following Dell’s return to the public market in 2018, the company’s stock underperformed. In June 2020, the Wall Street Journal reported that Dell was exploring various options with respect to its majority stake in the virtualization software company VMware. View Details
- June 2023 (Revised April 2025)
- Case
Optimalen Capital
A new client portfolio manager at a quantitative investment management firm must explain why her firm, Optimalen Capital, has rebalanced a client portfolio with a set of trades that seem unintuitive. In particular, Optimalen has added to its position of Walmart (ticker... View Details
- April 2023
- Article
The Stock Market Valuation of Human Capital Creation
By: Ethan Rouen and Matthias Regier
We develop a measure of firm-year-specific human capital investment from publicly disclosed personnel expenses (PE) and examine the stock market valuation of this investment. Measuring the future value of PE (PEFV) based on the relation between... View Details
- February 2023
- Article
Climate Solutions Investments
By: Alex Cheema-Fox, George Serafeim and Hui (Stacie) Wang
An increasing number of companies are providing products and services that help reduce carbon emissions in the economy. We develop a methodology to identify those companies and create a sample of publicly listed climate solutions companies allowing us to study their... View Details
- 2022
- Working Paper
How Do Investors Value ESG?
By: Malcolm Baker, Mark Egan and Suproteem K. Sarkar
Environmental, social, and governance (ESG) objectives have risen to near the top of the agenda for corporate executives and boards, driven in large part by their perceptions of shareholder interest. We quantify the value that shareholders place on ESG using a revealed... View Details
- Article
Recovering Investor Expectations from Demand for Index Funds
By: Mark Egan, Alexander J. MacKay and Hanbin Yang
We use a revealed-preference approach to estimate investor expectations of stock market returns. Using data on demand for index funds that follow the S&P 500, we develop and estimate a model of investor choice to flexibly recover the time-varying distribution of... View Details
- September 2022
- Article
Human Versus Machine: A Comparison of Robo-Analyst and Traditional Research Analyst Investment Recommendations
By: Braiden Coleman, Kenneth J. Merkley and Joseph Pacelli
We provide the first comprehensive analysis of the properties of investment recommendations generated by “Robo-Analysts,” which are human analyst-assisted computer programs conducting automated research analysis. Our results indicate that Robo-Analyst recommendations... View Details
- 2024
- Working Paper
Hidden Alpha
By: Manuel Amman, Alexander Cochardt, Lauren Cohen and Stephan Heller
This paper documents the central role of hidden connections between fund managers and firm officers in financial markets, drawing on an extensive dataset of over 100 thousand manually identified Facebook profiles and their 35 million Facebook friends. Our findings... View Details
- May 2022 (Revised April 2024)
- Case
Third Point in 2020: Growth Is Where the Value Is?
By: Robin Greenwood, James Williams and Denise Han
In early May 2020, Daniel Loeb’s team at Third Point was evaluating a potential growth opportunity in the Walt Disney Company and whether investor activism might play a role. Battered by the effects of COVID-19, the company’s stock had initially tumbled to $86 and then... View Details
- May 2022
- Supplement
Third Point in 2020: Growth Is Where the Value Is? (B)
By: Robin Greenwood and Denise Han
In early May 2020, Daniel Loeb’s team at Third Point was evaluating a potential growth opportunity in the Walt Disney Company and whether investor activism might play a role. Battered by the effects of COVID-19, the company’s stock had initially tumbled to $86 and then... View Details