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New research on investing from Harvard Business School faculty on issues including institutional investing, foreign direct investment, and investment activism.
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Best Ideas

by Miguel Antón, Randolph B. Cohen, and Christopher Polk

The “best ideas” in investment managers’ portfolios generate statistically and economically significant risk-adjusted returns over time, and they systematically outperform other positions in the portfolios. Investors can gain substantially if managers choose less-diversified portfolios that tilt more towards their best ideas.

Why Investors Often Lose When They Sue Their Financial Adviser

by Danielle Kost

Forty percent of American investors rely on financial advisers, but the COVID-19 market rollercoaster may have highlighted a weakness when disputes arise. The system favors the financial industry, says Mark Egan. Open for comment; Comment(s) posted.

Two Case Studies on the Financing of Forest Conservation

by Andrew Baxter, Connor Cash, Josh Lerner, and Ratnika Prasad

Case studies about The Conservation Fund and Sonen Capital highlight three broad lessons about fresh approaches to the ownership and management of forestland.

Market Investors Pay More for Resilient Companies

by Kristen Senz

During a market collapse, investors will pay up for companies considered resilient in their response, according to George Serafeim. Open for comment; Comment(s) posted.

Corporate Resilience and Response During COVID-19

by Alex Cheema-Fox, Bridget LaPerla, George Serafeim, and Hui (Stacie) Wang

Investors look for evidence during a market crisis that a company is resilient. This study includes findings that challenge the notion that companies need to adopt practices that hurt their employees because investors want them to do so.

How Anchor Investors Help Impact Funds Succeed

by Sean Silverthorne

3Questions A startup fund's ability to attract a major first investor is a signal to others that the investment pool is just fine for entering. Shawn Cole and Rob Zochowski answer questions about anchor investors. Open for comment; Comment(s) posted.

How Social Entrepreneurs Can Increase Their Investment Impact

by Rachel Layne

Grants or investments? Philanthropic organizations have multiple funding tools available, but choosing the wrong one can dilute the benefits, according to research by Benjamin N. Roth. Open for comment; Comment(s) posted.

Impact Investing: A Theory of Financing Social Entrepreneurship

by Benjamin N. Roth

The author provides a formal definition of organizational sustainability and characterizes the situations in which a social enterprise should be sustainable. The analysis then delineates when an investment in a social enterprise delivers superior impact to a grant.

A Preliminary Framework for Product Impact-Weighted Accounts

by George Serafeim, Katie Trinh, and Robert Zochowski

Although there is growing interest in environmental, social, and governance measurement, the impact of company operations is emphasized over product use. A framework like this one that captures a product’s reach, accessibility, quality, optionality, environmental use emissions, and end of life recyclability allows for a systematic methodology that can be applied to companies across many industries.

Why CalSTRS Chooses to Engage with the Gun Industry

Should large institutional investors divest or engage if they have an issue with a company? In a recent case study, Vikram Gandhi discusses how CalSTRS, the $200 billion pension plan for California public school teachers, chose to engage with gun makers and retailers. Open for comment; Comment(s) posted.

Shareholder Activism and Firms’ Voluntary Disclosure of Climate Change Risks

by Caroline Flammer, Michael W. Toffel, and Kala Viswanathan

Shareholder resolutions typically fail, and often by a wide margin. So why do active investors bother? It turns out that resolutions nonetheless can influence corporate transparency. Specifically, after being targeted with shareholder resolutions on environmental topics, this research shows that companies are more likely to publicly disclose their climate change risks—and that such disclosure increases these companies’ valuation.

Decarbonization Factors

by Alex Cheema-Fox, Bridget LaPerla, George Serafeim, David Turkington, and Hui (Stacie) Wang

This paper contributes to a growing knowledge base about how climate change impacts investor expectations, capital allocations and thereby pricing and returns. It provides actionable insights into how to decarbonize portfolios and evaluate the likely performance and carbon exposure differences across strategies.

Should a Pension Fund Try to Change the World?

Re: Rebecca M. Henderson, George Serafeim

Can inclusivity, sustainability, and better governance boost economies? Rebecca Henderson and George Serafeim discuss the impact investing efforts of GPIF, Japan’s government pension fund. Open for comment; Comment(s) posted.

Going Digital: Implications for Firm Value and Performance

by Wilbur Chen and Suraj Srinivasan

More and more nontechnology companies are adopting digital technologies like AI, data analytics, and machine learning. This study of the economic performance of nontech firms adopting new digital technologies finds a persistent future increase in valuation. However, investors only slowly incorporate the value implications of digital activities into prices. Nontech companies with senior executives with tech talent improve performance more than those without.

Reflexivity in Credit Markets

by Robin Greenwood, Samuel G. Hanson, and Lawrence J. Jin

Investors’ biases and market outcomes affect each other in a two-way feedback loop. This study develops a model of a credit market feedback loop, finding that when investors become more bullish this can predict positive returns in the short run, even if expected returns become more negative at longer horizons.

Activist CEOs Are Rising Up—and Their Customers Are Listening

by Michael Blanding

Are product sales affected by the CEO's stance on political and social issues? Michael Toffel and Aaron Chatterji study how consumers react to vocal chief executives. Open for comment; Comment(s) posted.

Diagnostic Bubbles

by Pedro Bordalo, Nicola Gennaioli, Spencer Yongwook Kwon, and Andrei Shleifer

The financial crisis of 2007-2008 revived academic interest in price bubbles but many conceptual questions remain open. This paper generates insights into the structure of asset price bubbles by modeling beliefs from fundamental psychological assumptions, and combining this with standard neoclassical mechanisms, such as learning from prices and speculation.

'Green Bonds' May Be Our Best Bet for Environmental Damage Control

by Michael Blanding

The popularity of green bonds as a way to finance environmentally friendly projects is on the upswing, say Malcolm Baker and George Serafeim. Open for comment; Comment(s) posted.

How Companies Can Increase Market Rewards for Sustainability Efforts

by Rachel Layne

There is a connection between public sentiment about a company and how the market rewards its corporate social performance, according to George Serafeim. Is your company undervalued? Open for comment; Comment(s) posted.

Do Fire Sales Create Externalities?

by Sergey Chernenko and Adi Sunderam

This paper contributes to our understanding of the role of large institutional investors in securities markets, providing evidence that the structure of the mutual fund industry increases the risks of costly "fire sales."