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- 2025
- Working Paper
Heterogeneous Beliefs and Stock Market Fluctuations
By: Odhrain McCarthy and Sebastian Hillenbrand
This paper examines the role of heterogeneous investor beliefs in explaining stock market puzzles. Using survey data, we show that individual investors and investment professionals, such as equity analysts and strategists, form distinct beliefs. These groups rely on... View Details
McCarthy, Odhrain, and Sebastian Hillenbrand. "Heterogeneous Beliefs and Stock Market Fluctuations." Working Paper, June 2025. (WFA Brattle Group Ph.D. Award for Outstanding Research.)
- 2025
- Working Paper
Cash Flow Volatility, Return Predictability and Stock Price Decompositions: Why You Should Scale Prices by Trend Cash Flows
By: Sebastian Hillenbrand and Odhrain McCarthy
We address two inconvenient facts in asset pricing: (i) valuation ratios are often more related to future cash flows than to returns, and (ii) they mostly fail to predict returns. We show that these issues arise because stock prices are scaled by cash flows that... View Details
Keywords: Cash Flow; Volatility; Investment Return; Asset Pricing; Forecasting and Prediction; Valuation; Stocks
Hillenbrand, Sebastian, and Odhrain McCarthy. "Cash Flow Volatility, Return Predictability and Stock Price Decompositions: Why You Should Scale Prices by Trend Cash Flows." Working Paper, June 2025.
- June 2025
- Case
TfL Pension Fund and the 2022 Gilt Market Crisis
By: Emil N. Siriwardane, Vincent Dessain, Emer Moloney and Carlota Moniz
On September 27, 2022, Padmesh Shukla, CIO of the Transport for London (TfL) Pension Fund, was keeping a careful eye on the turmoil in the U.K. sovereign bond (or gilt) market. When the new government announced the largest tax cuts the U.K. had seen in half a century,... View Details
Keywords: Financial Crisis; Macroeconomics; Assets; Asset Management; Borrowing and Debt; Corporate Finance; Capital Markets; Equity; Public Equity; Private Equity; Financial Liquidity; Financial Instruments; Debt Securities; Credit Derivatives and Swaps; Bonds; Stocks; Financial Strategy; Interest Rates; Governance; Governing and Advisory Boards; Crisis Management; Resource Allocation; Investment; Financial Services Industry; United Kingdom; England; London; Europe
- 2025
- Working Paper
Street Earnings: Implications for Asset Pricing
By: Sebastian Hillenbrand and Odhrain McCarthy
To address the excess volatility puzzle – the excessive movements in stock prices – researchers often study movements in valuation ratios. However, we demonstrate that movements in valuation ratios based on fundamental measures with high transitory volatility, such as... View Details
Hillenbrand, Sebastian, and Odhrain McCarthy. "Street Earnings: Implications for Asset Pricing." Working Paper, June 2025.
- 2025
- Working Paper
An Empirical Examination of Business Climate Alliances: Effective and/or Harmful?
By: Matteo Gasparini and Peter Tufano
This research studies business alliances that seek to address climate change, offering empirical evidence to address claims advanced by alliance supporters and critics. We study eleven major alliances mostly focused on financial services firms and 424 major... View Details
Keywords: Antitrust; Climate Change; Financial Institutions; Competition; Network Effects; Alliances
Gasparini, Matteo, and Peter Tufano. "An Empirical Examination of Business Climate Alliances: Effective and/or Harmful?" Harvard Business School Working Paper, No. 25-060, May 2025.
- 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
Sammon, Marco, and John J. Shim. "Index Rebalancing and Stock Market Composition: Do Indexes Time the Market?" SSRN Working Paper Series, No. 5080459, May 2025.
- May 2025
- Case
RTX's Lifetime Income Strategy: Shaping the Future of Retirement
By: Daniel Green, Luis M. Viceira and Sarah Mehta
Set in 2024, this case explores the Lifetime Income Strategy (LIS), a novel retirement product launched by aerospace and defense company RTX in 2012. Aiming to embed the security of a traditional pension within a 401(k) plan, the LIS allowed participants to secure a... View Details
Keywords: Asset Management; Compensation and Benefits; Collaborative Innovation and Invention; Jobs and Positions; Labor; Retirement; Society; Adoption; Aerospace Industry; Financial Services Industry; Insurance Industry; United States; Virginia
Green, Daniel, Luis M. Viceira, and Sarah Mehta. "RTX's Lifetime Income Strategy: Shaping the Future of Retirement." Harvard Business School Case 225-016, May 2025.
- 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
Generative AI Use by Capital Market Information Intermediaries: Evidence from Seeking Alpha
By: Mark Bradshaw, Chenyang Ma, Benjamin Yost and Yuan Zou
We study the use of generative AI for firm-specific financial analysis on the Seeking Alpha platform. We find that, after the initial launch of ChatGPT in November 2022, the share of AI-generated articles rose sharply to 13.4% of all articles, then declined in late... View Details
Keywords: Generative Ai; Seeking Alpha; Equity Research; Large Language Models; Gpt; AI and Machine Learning; Information Publishing; Financial Markets
Bradshaw, Mark, Chenyang Ma, Benjamin Yost, and Yuan Zou. "Generative AI Use by Capital Market Information Intermediaries: Evidence from Seeking Alpha." Harvard Business School Working Paper, No. 25-055, April 2025.
- April 2025
- Article
An Anatomy of Crypto-Enabled Cybercrimes
By: Will Cong, Campbell Harvey, Daniel Rabetti and Zong-Yu Wu
The advent of cryptocurrencies and digital assets holds the promise of improving financial systems by offering cheap, quick, and secure transfer of value. However, it also opens up new payment channels for cybercrimes. Assembling a diverse set of public on- and... View Details
Cong, Will, Campbell Harvey, Daniel Rabetti, and Zong-Yu Wu. "An Anatomy of Crypto-Enabled Cybercrimes." Management Science 71, no. 4 (April 2025): 3622–3633.
- April 2025
- Article
Serving with a Smile on Airbnb: Analyzing the Economic Returns and Behavioral Underpinnings of the Host’s Smile
By: Shunyuan Zhang, Elizabeth Friedman, Kannan Srinivasan, Ravi Dhar and Xupin Zhang
Non-informational cues, such as facial expressions, can significantly influence judgments and interpersonal impressions. While past research has explored how smiling affects business outcomes in offline or in-store contexts, relatively less is known about how smiling... View Details
Keywords: Sharing Economy; Airbnb; Image Feature Extraction; Machine Learning; Facial Expressions; Prejudice and Bias; Nonverbal Communication; E-commerce; Consumer Behavior; Perception
Zhang, Shunyuan, Elizabeth Friedman, Kannan Srinivasan, Ravi Dhar, and Xupin Zhang. "Serving with a Smile on Airbnb: Analyzing the Economic Returns and Behavioral Underpinnings of the Host’s Smile." Journal of Consumer Research 51, no. 6 (April 2025): 1073–1097.
- 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
Keywords: Socially Responsible Investing; Investment Portfolio; Welfare; Social Issues; Investment Return
Green, Daniel, and Benjamin N. Roth. "The Allocation of Socially Responsible Capital." Journal of Finance 80, no. 2 (April 2025): 755–781.
- 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
Greenwood, Robin, and Marco Sammon. "The Disappearing Index Effect." Journal of Finance 80, no. 2 (April 2025): 657–698.
- April 2025
- Article
The Fed and the Secular Decline in Interest Rates
In this paper I document a striking fact: a narrow window around Fed meetings fully captures the secular decline in U.S. Treasury yields since 1980. By contrast, yield movements outside this window are transitory and wash out over time. This is surprising because the... View Details
Keywords: United States Treasury; Monetary Policy; Yield Curve; Bonds; Financial Markets; Government Administration; Valuation; Interest Rates; United States
Hillenbrand, Sebastian. "The Fed and the Secular Decline in Interest Rates." Review of Financial Studies 38, no. 4 (April 2025): 981–1013. (Editor's Choice.)
- 2025
- Working Paper
With a Little Help from My Family: Informal Startup Financing
By: Brian K. Baik, Johan Ludvig S. Karlsen and Katja Kisseleva
Using Norwegian administrative data, we identify family equity investments in startups
and examine their effects on investor returns and firm behavior. Informal investors
earn lower returns than external individuals, and the firms they back are less
likely to secure... View Details
Keywords: Early Stage Finance; Informal Investment; Household Finance; Risk Taking; Entrepreneurial Finance; Entrepreneurship; Personal Finance; Family and Family Relationships; Business Startups; Investment; Norway
Baik, Brian K., Johan Ludvig S. Karlsen, and Katja Kisseleva. "With a Little Help from My Family: Informal Startup Financing." Harvard Business School Working Paper, No. 25-053, April 2025.
- March 2025
- Case
Boom, Bust, or Bullseye? Navigating the Short-Term Rental Market
By: John Macomber, Juan Pablo Heusser Killing, Siddhant Pardeshi and Sally Su
Short-term rentals listed via apps like AirBnB and VRBO are increasingly interesting investments for small-scale real estate investors. However, they have substantial operating costs, vacancy risk, and regulatory exposure compared to traditional long-term leases... View Details
- 25 Mar 2025
- Other Presentation
Louis E. Caldera on the Panama Canal and DEI Under Trump's Administration
By: Louis Caldera and June Carolyn Erlick
Louis E. Caldera, a Senior Lecturer at Harvard Business School, chaired the Panama Canal Commission the year the Canal was returned to Panama, 1999. He was also the first (and only) Latino to serve as Secretary of the Army. He talks on issues ranging from President... View Details
"Louis E. Caldera on the Panama Canal and DEI Under Trump's Administration." Faculty Voices (podcast), Harvard University, David Rockefeller Center for Latin American Studies, March 25, 2025.
- March 2025
- Case
The Changing Climate on Wall Street
By: Clayton S. Rose, Maxim Pike Harrell and Michael Norris
Increasing and conflicting regulatory requirements and political pressures regarding climate change tested the leaders of U.S. financial institutions, as they struggled to determine how best to comply while managing their business and its risks.
In October 2024,... View Details
Keywords: Change; Disruption; Competency and Skills; Decision Making; Cost vs Benefits; Ethics; Governance; Corporate Accountability; Leadership; Management; Risk Management; Organizations; Corporate Social Responsibility and Impact; Mission and Purpose; Organizational Change and Adaptation; Organizational Culture; Society; Civil Society or Community; Social Issues; Strategy; Adaptation; Banking Industry; Financial Services Industry; Insurance Industry; United States; Europe
Rose, Clayton S., Maxim Pike Harrell, and Michael Norris. "The Changing Climate on Wall Street." Harvard Business School Case 325-020, March 2025.
- March 2025 (Revised May 2025)
- Case
Primetime Partners: Investing in Healthspan, Wealthspan, and Workspan
By: Rembrand Koning, Nicole Tempest Keller and Susan Wilner Golden
In the fall of 2024, Abby Miller Levy (HBS ’01), co-founder and managing partner of Primetime Partners, was preparing to raise a second fund. Founded in 2020 with veteran investor Alan Patricof, Primetime was a horizontal fund focused on early-stage companies serving... View Details
Keywords: Investment Funds; Age; Social Issues; Financing and Loans; Investment Return; Business Strategy; Financial Services Industry; United States
Koning, Rembrand, Nicole Tempest Keller, and Susan Wilner Golden. "Primetime Partners: Investing in Healthspan, Wealthspan, and Workspan." Harvard Business School Case 825-095, March 2025. (Revised May 2025.)
- 2025
- Working Paper
Centralized Governance in Decentralized Organizations
By: Lin William Cong, Daniel Rabetti, Charles C.Y. Wang and Yu Yan
We systematically document governance centralization in decentralized autonomous organizations (DAOs) and study its drivers and economic implications. Using multiple data sources and granular on-chain transactional data, we compare our findings to those in corporate... View Details
Cong, Lin William, Daniel Rabetti, Charles C.Y. Wang, and Yu Yan. "Centralized Governance in Decentralized Organizations." Working Paper, March 2025.