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Thummim Cho

Korea University · 経済学

研究室紹介

Professor Thummim Cho's research lab specializes in asset pricing, corporate finance, and financial intermediation, with a focus on understanding the determinants of asset prices, risk exposures, and market efficiency. The lab investigates how mispricing, arbitrage activity, and funding conditions shape long-horizon returns and cross-sectional price anomalies. Key research directions include the role of investor sentiment, the endogenous risk creation through arbitrage, and the impact of macro-financial frictions on asset pricing and market integration. The lab combines theoretical modeling with novel empirical methods to analyze firm fundamentals, market-to-book ratios, and international equity correlations.

asset pricingarbitragemispricingmarket efficiencyfunding liquidity

Research Overview

Papers
14
Total Citations
93
Papers (5y)
8
Primary Field
経済学

Research Output Trend

Figures are computed from collected data and may differ slightly.

Publications per year (5y)
8total
2021
2023
2024
2025
2026
Citations per year (5y)
43total
20212023202420252026

Selected Papers

14
1
Article|32 citations·2020
Turning alphas into betas: Arbitrage and endogenous risk
Thummim Cho
SJR Q1Journal of Financial Economics
FinanceEconomics, Econometrics and Finance
2
Article|24 citations·2024
Putting the Price in Asset Pricing
Thummim Cho, Christopher Polk
SJR Q1The Journal of FinanceOA

ABSTRACT We propose a novel way to estimate a portfolio's abnormal price , the percentage gap between price and the present value of dividends computed with a chosen asset pricing model. Our method, based on a novel identity, resembles the time‐series estimator of abnormal returns, avoids the issues in alternative approaches, and clarifies the role of risk and mispricing in long‐horizon returns. We apply our techniques to study the cross‐section of price levels relative to the capital asset pric

FinanceEconomics, Econometrics and Finance
3
Article|10 citations·2023
Scale or Yield? A Present-Value Identity
Thummim Cho, Lukas Kremens, Dongryeol Lee, Christopher Polk
SJR Q1Review of Financial StudiesOA

Abstract We propose a loglinear present-value identity in which investment (“scale”), profitability (“yield”), and discount rates determine a firm’s market-to-book ratio. Our identity reconciles existing influential market-to-book decompositions and facilitates novel insights from three empirical applications: (1) Both investment and profitability are important contributors to the value spread and stock return news variance. (2) Any cross-sectional return predictability has a mirror image in cas

FinanceEconomics, Econometrics and Finance
4
Article|10 citations·2019
Asset Pricing with Price Levels
Thummim Cho, Christopher Polk
SSRN Electronic JournalOA
FinanceEconomics, Econometrics and Finance
5
Article|7 citations·2020
Which Asset Pricing Model Do Firms Use? A Revealed Preference Approach
Thummim Cho, Amirabas Salarkia
SSRN Electronic JournalOA
FinanceEconomics, Econometrics and Finance
6
Article|6 citations·2021
The Present Value of Future Market Power
Thummim Cho, Marco Grotteria, Lukas Kremens, Howard Kung
SSRN Electronic JournalOA
FinanceEconomics, Econometrics and Finance
7
Article|3 citations·2021
Scale or Yield? A Present-Value Identity
Thummim Cho, Lukas Kremens, Dongryeol Lee, Christopher Polk
SSRN Electronic JournalOA
FinanceEconomics, Econometrics and Finance
8
Article|1 citations·2019
Turning Alphas into Betas: Arbitrage and Endogenous Risk
Thummim Cho
London School of Economics and Political Science Research Online (London School of Economics and Political Science)OA

Using data on asset pricing anomalies, I test the idea that the act of arbitrage turns “alphas” into “betas”: Assets with high initial abnormal returns attract more arbitrage and covary endogenously more with systematic factors that arbitrage capital is exposed to. This channel explains the exposures of 40 anomaly portfolios to aggregate funding liquidity shocks and arbitrageur wealth portfolio shocks. My results highlight that financial intermediaries that act as asset market arbitrageurs not o

FinanceEconomics, Econometrics and Finance
9
dissertation|0 citations·2017
Essays in Asset Pricing and Macroeconomics
Thummim Cho
Digital Access to Scholarship at Harvard (DASH) (Harvard University)OA

This dissertation presents three essays. The first essay finds that investment strategies which generate “alphas” become endogenously risky by acquiring “betas” with respect to shocks that institutional arbitrageurs are exposed to. This essay provides both theoretical and empirical arguments. The second essay finds that exogenous shocks to liquidity demand cause a variation in the reward for aggregate liquidity provision. To draw this conclusion, this essay uses the daily temperature variation w

Economics and EconometricsEconomics, Econometrics and Finance
10
Article|0 citations·2019
Global Capital and the Cross-Section of International Equity Return Comovement
Thummim Cho, Argyris Tsiaras
SSRN Electronic JournalOA

What makes a country’s stock market more correlated with the U.S. stock market than others? This paper documents and investigates theoretically a strong positive cross-sectional relationship between the share of an equity market held by foreign investors, U.S. investors in particular, and the return correlations of 40 equity markets with the U.S. market. We argue that frictions impeding the cross-border holding of equity are key determinants of cross-border positions and equity market return cor

FinanceEconomics, Econometrics and Finance
11
Article|0 citations·2026
The Present Value of Future Market Power
Thummim Cho, Marco Grotteria, Lukas Kremens, Howard Kung
SJR Q1Review of Financial Studies

Abstract We introduce a present-value identity relating a firm’s market value to expected future markups, output growth, discount rates, and investments. Distinguishing current from expected markups reveals five empirical facts: (1) Expected markups account for half the rise in U.S. firm values since 1980. (2) The rise in aggregate expected markups reflects market-share reallocation toward high-expected-markup firms and within-firm increases. (3) Expected markups are linked to intangible investm

Strategy and ManagementBusiness, Management and Accounting
12
dataset|0 citations·2023
Replication Code for "Scale or Yield? A Present-Value Identity"
Thummim Cho, Lukas Kremens, Dongryeol Lee, Christopher Polk
London School of Economics and Political Science Research Online (London School of Economics and Political Science)OA

Stata and Matlab codes to replicate Tables and Figures in "Scale or Yield? A Present-Value Identity"

Statistics and ProbabilityMathematics
13
Preprint|0 citations·2025
Equity Valuation Without DCF
Thummim Cho, Christopher Polk, Robert D. Rogers
SSRN Electronic JournalOA
Strategy and ManagementBusiness, Management and Accounting
14
Preprint|0 citations·2026
What is a Currency Worth?
Thummim Cho, Riccardo Colacito, Lukas Kremens, Mirela Sandulescu
SSRN Electronic JournalOA
General Economics, Econometrics and FinanceEconomics, Econometrics and Finance

Research Areas

FinanceStrategy and ManagementEconomics and EconometricsStatistics and ProbabilityGeneral Economics, Econometrics and Finance

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