Research
Chaudhuri, Shomesh E., and Andrew W. Lo (2024),Financially adaptive clinical trials via option pricing analysis, Journal of Econometrics 240 (2), 105026. https://doi.org/10.1016/j.jeconom.2020.08.012.
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The regulatory approval process for new therapies involves costly clinical trials that can span multiple years. When valuing a candidate therapy from a financial perspective, industry sponsors may terminate a program early if clinical evidence suggests market prospects are not as favorable as originally forecasted. Intuition suggests that clinical trials that can be modified as new data are observed, i.e., adaptive trials, are more valuable than trials without this flexibility. To quantify this value, we propose modeling the accrual of information in a clinical trial as a sequence of real options, allowing us to systematically design early-stopping decision boundaries that maximize the economic value to the sponsor. In an empirical analysis of selected disease areas, we find that when a therapy is ineffective, our adaptive financing method can decrease the expected cost incurred by the sponsor in terms of total expenditures, number of patients, and trial length by up to 46%. Moreover, by amortizing the large fixed costs associated with a clinical trial over time, financing these projects becomes less risky, resulting in lower costs of capital and larger valuations when the therapy is effective.
Jorring, Adam T., Andrew W. Lo, Tomas J. Philipson, Manita Singh, and Richard T. Thakor (2022), Sharing R&D Risk in Healthcare via FDA Hedges, Review of Corporate Finance Studies 11(4), 880–922.
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Biomedical innovation suffers from a “funding gap” between the needs of drug development firms and the availability of funds. The requirement of large investments for drug development projects and the high pipeline risk associated with FDA approval causes this funding gap in part. In this paper, we propose a new financial instrument—the “FDA hedge”—that pays off upon FDA approval failure. We develop a theory to show that the FDA hedge can help eliminate the funding gap. Using novel project-level data, we establish empirically that FDA hedge risk is idiosyncratic, and show how better sharing this risk can spur welfare-enhancing R&D.
Thakor, Richard T., and Andrew W. Lo (2022), Competition and R&D Financing: Evidence from the Biopharmaceutical Industry, Journal of Financial and Quantitative Analysis 57 (5), 1885–1928.
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The interaction between product market competition, R&D investment, and the financing choices of R&D-intensive firms on the development of innovative products is only partially understood. We hypothesize that as competition increases, R&D-intensive firms will: i) increase R&D investment relative to existing assets in place; ii) carry more cash; and iii) maintain less net debt. Using the Hatch–Waxman Act as an exogenous shock to competition, we provide causal evidence supporting these hypotheses through a differences-in-differences analysis that exploits differences between the biopharma industry and other industries, and heterogeneity within the biopharma industry. We also explore how these changes affect innovative output.
de Castro, Leo, Andrew W. Lo, Taylor Reynolds, Fransisca Susan, Vinod Vaikuntanathan, Daniel Weitzner, and Nicolas Zhang (2020), SCRAM: A Platform for Securely Measuring Cyber Risk, Harvard Data Science Review 2 (3), https://doi.org/10.1162/99608f92.b4bb506a.
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We develop a new cryptographic platform called SCRAM (Secure Cyber Risk Aggregation and Measurement) that allows multiple entities to compute aggregate cyber-risk measures without requiring any entity to disclose its own sensitive data on cyberattacks, penetrations, and losses. Using the SCRAM platform, we present results from two computations in a pilot study with six large private-sector companies: (1) benchmarks of the adoption rates of 171 critical security measures and (2) links between monetary losses from 49 security incidents and the specific sub-control failures implicated in each incident. These results provide insight into problematic cyber-risk-control areas that need additional scrutiny and/or investment, but in a completely anonymized and privacy-preserving way.
Lo, Andrew W., Alexander Remorov, and Zied Ben Chaouch (2020), Measuring Risk Preferences and Asset-Allocation Decisions: A Global Survey Analysis, Journal of Investment Management 18 (3), 5-50.
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We use a global survey of over 22,400 individual investors, 4,892 financial advisors, and 2,060 institutional investors between 2015 and 2017 to elicit their asset allocation behavior and risk preferences. We find substantially different behaviors among these three groups of market participants. Most institutional investors exhibit highly contrarian reactions to past returns in their equity allocations. Financial advisors are also mostly contrarian; a few of them demonstrate passive behavior. However, individual investors tend to extrapolate past performance. We use a clustering algorithm to partition individuals into five distinct types: passive investors, risk avoiders, extrapolators, contrarians, and optimistic investors. Across demographic categories, older investors tend to be more passive and risk averse.
Macroeconomic Models for Monetary Policy: A Critical Review from a Finance Perspective
Dou, Winston W., Andrew W. Lo, Ameya Muley, and Harald Uhlig (2020), Macroeconomic Models for Monetary Policy: A Critical Review from a Finance Perspective, Annual Review of Financial Economics 12, 95–140.
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We provide a critical review of macroeconomic models used for monetary policy at central banks from a finance perspective. We review the history of monetary policy modeling, survey the core monetary models used by major central banks, and construct an illustrative model for those readers who are unfamiliar with the literature. Within this framework, we highlight several important limitations of current models and methods, including the fact that local-linearization approximations omit important nonlinear dynamics, yielding biased impulse-response analysis and parameter estimates. We also propose new features for the next generation of macrofinancial policy models, including: a substantial role for a financial sector, the government balance sheet and unconventional monetary policies; heterogeneity, reallocation, and redistribution effects; the macroeconomic impact of large nonlinear risk-premium dynamics; time-varying uncertainty; financial sector and systemic risks; imperfect product market and markups; and further advances in solution, estimation, and evaluation methods for dynamic quantitative structural models.
Lo, Andrew W., and Kien Wei Siah (2021), Financing Correlated Drug Development Projects, Journal of Structured Finance 27 (1), 17–34, https://doi.org/10.3905/jsf.2020.1.114 .
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Current business models have struggled to support early-stage drug development. In this paper, we study an alternative financing model, the megafund structure, to fund drug discovery. We extend the framework proposed in previous studies to account for correlation between phase transitions in drug development projects, thus making the model a more realistic representation of biopharma research and development. In addition, we update the parameters used in our simulation with more recent estimates of the probability of success (PoS). We find that the performance of the megafund becomes less attractive when correlation between projects is introduced. However, the risk of default and the expected returns of the vanilla megafund remain promising even under moderate levels of correlation. In addition, we find that a leveraged megafund outperforms an equity-only structure over a wide range of assumptions about correlation and PoS.
Chaudhuri, Shomesh, Terence C. Burnham, and Andrew W. Lo (2020), An Empirical Evaluation of Tax-Loss-Harvesting Alpha, Financial Analysts Journal 76 (3), 99-108.
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Advances in financial technology have made tax-loss harvesting more feasible for retail investors than such strategies were in the past. We evaluated the magnitude of this “tax alpha” with the use of historical data from the CRSP monthly database for the 500 securities with the largest market capitalizations from 1926 to 2018. Given long-term and short-term capital gains tax rates of 15% and 35%, respectively, we found that a tax-loss-harvesting strategy yielded a before-transaction-cost tax alpha of 1.08% per year for our sample period. When the strategy was constrained by the “wash sale rule,” the tax alpha decreased from 1.08% per year to 0.82% per year.
Lim, Terence, Andrew W. Lo, Robert C. Merton, and Myron S. Scholes (2006), The Derivatives Sourcebook, Foundations and Trends in Finance 1 (5–6), 365–572.
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The Derivatives Sourcebook is a citation study and classification system that organizes the many strands of the derivatives literature and assigns each citation to a category. Over 1800 research articles are collected and organized into a simple web-based searchable database. We have also included the 1997 Nobel lectures of Robert Merton and Myron Scholes as a backdrop to this literature.
Kim, Esther, and Andrew W. Lo (2019), Venture Philanthropy: A Case Study of the Cystic Fibrosis Foundation, April 23.
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Advances in biomedical research have created significant opportunities to bring to market a new generation of therapeutics. However, early-stage assets often face a dearth of funding, as they have a high risk of failure and significant development costs. Historically, this has been particularly true for assets intended to treat rare diseases, where market sizes are often too small to attract much attention and funding. Venture philanthropy (VP) — which, for the purpose of this paper, is defined as a model in which nonprofit, mission-driven organizations fund initiatives to advance their objectives and potentially achieve returns that can be reinvested toward their mission — offers an alternative to traditional funding sources like venture capital or the public markets. Here we highlight the Cystic Fibrosis (CF) Foundation, widely considered to be the leading VP organization in biotech, which facilitated the development of Kalydeco, the first disease-modifying therapy approved to treat cystic fibrosis. We evaluate the CF Foundation’s example, including its agreement structures and strategy, explore the challenges that other nonprofits may have in adopting this strategy, and draw lessons from the CF Foundation for other applications of VP financing.