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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
- May 2025
- Case
'Net Zero in Action': Impact Investing at the McKnight Foundation
By: Lauren Cohen, Christina R. Wing and Sophia Pan
Elizabeth McGeveran, Vice President of Investments at the McKnight Foundation, reflected on how to effectively advance the organization’s net-zero strategy. The foundation had committed 10% of its endowment to building a portfolio of impact investments and was among... View Details
Keywords: Investment Fund; Philanthropy; Charitable Donations; Sustainability; Foundation; Impact Investing; ESG; Family Business; Forecasting and Prediction; Private Sector; Renewable Energy; Social Entrepreneurship; Climate Change; Environmental Sustainability; Green Technology; Financial Strategy; Investment Funds; Investment Portfolio; Institutional Investing; Corporate Accountability; Corporate Social Responsibility and Impact; Mission and Purpose; Private Ownership; Philanthropy and Charitable Giving; Social Issues; Sustainable Cities; Financial Services Industry; Minnesota; United States
- May 2025
- Case
The Micro-Family Office: Aamir Rehman
By: Lauren Cohen and Sophia Pan
With a successful career and strong academic credentials, Aamir Rehman sought to design a life grounded in autonomy. For him, this meant serving on boards, continuing his professorship, and ensuring a secure and comfortable life for his family. While he didn’t possess... View Details
Keywords: Family Office; Organization Design; Family And Friends; Family; Balance; Stability; Trends And Opportunities; Wealth Management; Family Business; Investment; Financial Strategy; Personal Finance; Investment Portfolio; Private Equity; Organizational Design; Family and Family Relationships; Happiness; Satisfaction; Balance and Stability; Human Capital; Compensation and Benefits; Economy; Trends; Business Model; New Jersey; United States
- 2025
- Working Paper
Performance Capital Flows in DC Pensions
By: Bryan Gutierrez Cortez, Victoria Ivashina and Juliana Salomao
Are defined contribution (DC) pension funds' capital flows sensitive to performance? We examine pressures from individual account holders who can switch their pension managers. Using novel data on retirement accounts for nearly 10 million individuals, we analyze... View Details
- April 2025
- Article
The Allocation of Socially Responsible Capital
By: Daniel Green and Benjamin N. Roth
Portfolio allocation decisions increasingly incorporate social values. We develop a tractable framework to study how competition between investors to own socially valuable assets affects social welfare. Relative to the most common social-investing strategies, we... View Details
- March 2025
- Case
Silicon Valley Bank: Gone in 36 Hours
This case examines factors contributing to the collapse of Silicon Valley Bank (SVB) in March 2023, an event as unpredicted as it was quick. SVB funded nearly half of all U.S. venture-backed startups and at the end of 2022 held $173 billion in deposits, largely... View Details
Keywords: Accounting Standards; Bank Runs; Financial Accounting; Financial Reporting; Social Media; Banks and Banking; Financing and Loans; Investment Portfolio; Interest Rates; Debt Securities; Risk and Uncertainty; Financial Statements; Risk Management; Failure; Fair Value Accounting; Credit; Corporate Governance; Financial Services Industry; Banking Industry; United States
- February 2025 (Revised May 2025)
- Case
Align Partners and SM Entertainment: Korean Shareholder Activism Meets K-Pop (A)
By: Charles C.Y. Wang and Billy Chan
For years, institutional investors had experienced very limited success in influencing the management of listed companies through shareholder activist campaigns in Korea. The common practice of circular ownership and public resentment toward foreign shareholder... View Details
- February 2025
- Supplement
Align Partners and SM Entertainment: Korean Shareholder Activism Meets K-Pop (B)
By: Charles CY Wang and Billy Chan
For years, institutional investors had experienced very limited success in influencing the management of listed companies through shareholder activist campaigns in Korea. The common practice of circular ownership and public resentment toward foreign shareholder... View Details
- February 2025
- Case
Doing Business in Kigali, Rwanda
By: Andy Zelleke, Martin A. Sinozich, Julianne Bliss and Choetsow Tenzin
Rwanda’s transformation from a post-genocide recovery effort to one of Africa’s fastest-growing economies presents a compelling case for investors and business leaders. With an ambitious Vision 2050 strategy, Kigali has emerged as a regional hub for trade, innovation,... View Details
- 2025
- Working Paper
Dynamic Personalization with Multiple Customer Signals: Multi-Response State Representation in Reinforcement Learning
Reinforcement learning (RL) offers potential for optimizing sequences of customer interactions by modeling the relationships
between customer states, company actions, and long-term value. However, its practical implementation often faces significant
challenges.... View Details
- 2025
- Working Paper
Impact Investing and Worker Outcomes
By: Josh Lerner, Markus Lithell and Gordon M. Phillips
Impact investors claim to distinguish themselves from traditional venture capital and growth
equity investors by also pursuing environmental, social, and governance (ESG) objectives.
Whether they successfully do so in practice is unclear. We use confidential Census... View Details
- January 2025
- Case
Arsenal Capital Partners' Refinancing of Pinnacle
By: Victoria Ivashina and Srimayi Mylavarapu
Arsenal Capital Partners’ portfolio company, Pinnacle, a leading producer of high-performance adhesive technologies, has experienced rapid growth under Arsenal’s ownership. Over just two years, Pinnacle's EBITDA increased from $13.5 million to $60 million. By mid-2021,... View Details
- January 2025 (Revised April 2025)
- Case
Doing Business in Cairo: Navigating a Path to Economic Resilience
By: A. Zelleke and Ahmed Dahawy
Egypt has long been a pivotal force in the Middle East and North Africa. Located at a crossroads of global trade routes, the country was a strategic partner for numerous regional and global powers. However, a substantial currency devaluation in 2016 brought many... View Details
Keywords: Business; Developing Countries and Economies; Economic Slowdown and Stagnation; Inflation and Deflation; Macroeconomics; Cross-Cultural and Cross-Border Issues; Globalized Economies and Regions; International Relations; Emerging Markets; Risk and Uncertainty; Culture; Economy; Country; Currency; Investment; Governing Rules, Regulations, and Reforms; Egypt
- January 2025
- Case
Index and Active Investing: Vanguard and the New Frontier of Active ETFs
By: Marco Sammon, Luis M. Viceira and Jonathan Kanagasabai
This case explores Vanguard’s strategic decision-making process as it considers entering the growing market for actively managed exchange-traded funds (ETFs). Set in 2024, the case places students in the position of Rodney Comegys, Vanguard’s global head of the Equity... View Details
- January 2025
- Case
North Forty: Managing Liquidity Through Change
By: Luis M. Viceira and Brad Towne
This case explores the interaction between spending and investment decisions at a family office, specifically the family office of Jeff and Tricia Raikes, with special emphasis on the management of spending, portfolio investments, and asset liquidity in the presence of... View Details
- December 2024
- Case
AC Milan
By: Anita Elberse
In April 2024, Giorgio Furlani is nearing the end of his first full season as chief executive officer of Italian soccer club AC Milan. A Harvard Business School Class of 2007 graduate with a finance background, Furlani was appointed by RedBird Capital Partners’ founder... View Details
- November 2024 (Revised January 2025)
- Case
Balancing Impact: Modeling the Future at British International Investment
By: Shawn Cole and Jonah Zahnd
In 2022, British International Investment (BII), the £8.1 billion development finance arm of the British government, implemented a new impact measurement system called the Impact Score to align its financial and impact objectives systematically. The tool was designed... View Details
- 2024
- Article
Political Polarization and Finance
By: Elisabeth Kempf and Margarita Tsoutsoura
We review an empirical literature that studies how political polarization affects financial decisions. We first discuss the degree of partisan segregation in finance and corporate America, the mechanisms through which partisanship may influence financial decisions, and... View Details
- 2024
- Working Paper
How Do Global Portfolio Investors Hedge Currency Risk?
By: Robin Greenwood and Alex Cheema-Fox
We use monthly portfolio data from one of the world’s largest custodian banks, with over $40 trillion assets under custody, to study how global portfolio investors hedge foreign exchange risk in their equity and fixed income portfolios over the past 25 years. The data... View Details
- October 2024
- Case
GLIN Impact Capital
By: Ethan Rouen and Akiko Saito
In 2024, the co-founders of the venture capital fund GLIN Impact Capital face a critical inflection point as they consider launching a second, significantly larger impact investment fund in Japan. Founded in 2021 by the three Harvard Business School alumni, GLIN is one... View Details