We provide answers to questions like the following, in portfolio optimization, risk management, trading, and other related fields.
• Why mathematically accurate formulas lead to poor out-of-sample performance? (Such as Markowitz mean-variance optimal portfolio, minimum variance portfolio, etc).
• How high-dimensionality affects our understanding of the population from sample, on such aspects as covariance structure, eigenvalues, principle components etc? -- “curse of dimensionality”
• How high-frequency data may lead to terribly biased estimates of parameters (volatilities/covolatilities etc) and affect further decision making? -- “curse of frequency”
• How to make better use of high-frequency and high-dimensional data, changing “curse of dimensionality” and “curse of frequency” into “bless of dimensionality and frequency”?
• How to make use of statistical machine learning to reach optimal individualized wealth management decisions?
High-Dimension, Mean-Variance Efficiency, Factor Investing, Index Enhancement, Machine Learning Return Forecast...
Co-jump networks, Jump Intensity, Volatility Co-movement, Market Microstructure Modeling, Leverage Effect, Volatility Estimation and Prediction...
Stochastic Discount Factor, Factor Zoo, Inference, Return Predictability...
Statistical Learning, Individualized Asset Allocation, Reinforcement Learning, Utility Optimization...
lizhuoxi at ust.hk
rohansen at ust.hk
chuiab at connect.ust.hk
rhuangbb at connect.ust.hk
hkongab at connect.ust.hk
sliangas at connect.ust.hk
jyanged at connect.ust.hk
jiawei at ust.hk
yuheng.wu at connect.ust.hk
zzhanggs at connect.ust.hk
yuronghuang at ust.hk
dcchen at smu.edu.sg
pzhaoai at connect.ust.hk
clyuaj at connect.ust.hk
jlicv at connect.ust.hk
jyuanan at connect.ust.hk
yizhangnq at connect.ust.hk
linchy at ust.hk
haiwwu at ust.hk
bzhanaa at connect.ust.hk
kchoudhury at connect.ust.hk
gliuaj at ust.hk
kcliap at connect.ust.hk
iaszhuqs at ust.hk
qliubp at connect.ust.hk
ziyi at ust.hk
weify at ust.hk
jmabh at connect.ust.hk
kellyzhao at ust.hk
luowen at ziasset.com
statxxy at outlook.com
aomengmeng1 at gmail.com
liugying at nau.edu.cn
zhang.zhiyuan at mail.shufe.edu.cn
yichuli at tepper.cmu.edu
Predictive Factor Model for Jump Intensities, Yi Ding, Shiman Hu, Yingying Li, Yingying Li and Xinghua Zheng, submitted |
Efficient Portfolio Estimation in Large Risky Asset Universes, Leheng Chen, Yingying Li and Xinghua Zheng, submitted |
Incorporating Return Prediction in High-Dimensional Mean-Variance Portfolio Optimization, Ruizhao Huang, Yingying Li and Xinghua Zheng, submitted |
Cross-Sectional Learning and Inference for the Stochastic Discount Factor, Zhanhui Chen, Yi Ding, Yingying Li and Xinghua Zheng, submitted |
Uncovering Stock Risk Linkages via Mixed Membership Co-jump Networks, Yingying Li, Guoli Liu, Changlei Lyu and Xinghua Zheng, submitted |
Robust Large Portfolio Optimization with Heteroscedastic and Heavy-Tailed Returns, Mengmeng Ao, Leheng Chen, Yingying Li and Xinghua Zheng, in revision |
How to Dominate the Historical Average, Kai Li, Yingying Li, Changlei Lyu and Jialin Yu, Review of Financial Studies, available online |
Tests for Principal Eigenvalues and Eigenvectors, Jianqing Fan, Yingying Li, Ningning Xia and Xinghua Zheng, to appear in Journal of the American Statistical Association |
Multiplicative Factor Modeling for Volatility, Yi Ding, Robert Engle, Yingying Li and Xinghua Zheng, Journal of Econometrics, 249,2025,105959 |
Sub-Gaussian High-Dimensional Covariance Matrix Estimation under Elliptical Factor Model with 2 εth Moment, Yi Ding and Xinghua Zheng, in revision |
High-Dimensional Covariance Matrices Under Dynamic Volatility Models: Asymptotics and Shrinkage Estimation, Yi Ding and Xinghua Zheng, Annals of Statistics, 52(3), 2024, 1027-1049 |
In-Sample and Out-of-Sample Sharpe Ratios of Multi-Factor Asset Pricing Models, Raymond Kan, Xiaolu Wang and Xinghua Zheng, Journal of Financial Economics, 155, 2024, 103837 |
Supercritical Spatial SIR Epidemics: Spreading Speed and Herd Immunity, Xinghua Zheng and Qingsan Zhu, Annals of Applied Probability, 34(4), 2024, 3584-3630 |
Stock Co-Jump Networks, Yi Ding, Yingying Li, Guoli Liu and Xinghua Zheng, Journal of Econometrics, 239(2), 2024, 105420 |
Mining the Factor Zoo: Estimation of Latent Factor Models with Sufficient Proxies, Runzhe Wan, Yingying Li, Wenbin Lu and Rui Song, Journal of Econometrics, 239(2), 2024, 105386 |
Statistical Learning for Individualized Asset Allocation, Yi Ding, Yingying Li, Rui Song, Journal of the American Statistical Association, 119(545), 2024, 639-649 |
Volatility of Volatility: Estimation and Tests Based on Noisy High Frequency Data with Jumps, Yingying Li, Guangying Liu and Zhiyuan Zhang, Journal of Econometrics, 229(2), 2022, 422-451 |
Volatility Measurement with Pockets of Extreme Return Persistence, Torben G. Andersen, Yingying Li, Viktor Todorov and Bo Zhou, Journal of Econometrics, 237(2), 2023, 105048 |
High Dimensional Minimum Variance Portfolio Estimation under Statistical Factor Models, Yi Ding, Yingying Li and Xinghua Zheng, Journal of Econometrics, 222 (1), 2021, 502-515 |
High-dimensional Minimum Variance Portfolio Estimation Based on High-frequency Data, Tony Cai, Jianchang Hu, Yingying Li and Xinghua Zheng, Journal of Econometrics, 214(2), 2020, 482-494 |
Approaching Mean-Variance Efficiency for Large Portfolios, Mengmeng Ao, Yingying Li and Xinghua Zheng, Review of Financial Studies, 32(7), 2019, 2890–2919 |
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See here for a summary from CFA Digest |
Estimating the Integrated Volatility with Tick Observations, Jean Jacod, Yingying Li and Xinghua Zheng, Journal of Econometrics, 208(1), 2019, 80-100 |
Testing High-Dimensional Covariance Matrices Under the Elliptical Distribution and Beyond, Xinxin Yang, Xinghua Zheng, Jiaqi Chen, Journal of Econometrics, 2021 |
A Unified Approach to Volatility Estimation in the Presence of Both Rounding and Random Market Microstructure Noise, Yingying Li, Zhiyuan Zhang and Yichu Li, Journal of Econometrics, 203(2), 2018, 187-222 |
On the Inference About the Spectral Distribution of High-Dimensional Covariance Matrix Based on High-Frequency Noisy Observations, Ningning Xia and Xinghua Zheng, Annals of Statistics, 46, 2018, 500-525 |
Statistical Properties of Microstructure Noise, Jean Jacod, Yingying Li and Xinghua Zheng, Econometrica , 85, 2017, 1133-1174 |
Efficient Estimation of Integrated Volatility Incorporating Trading Information, Yingying Li, Shangyu Xie and Xinghua Zheng, Journal of Econometrics, 195(1), 2016, 33-50 |
Rounding Errors and Volatility Estimation, Yingying Li and Per A. Mykland, Journal of Financial Econometrics, 13(2), 2015, 478-504 |
Realized Volatility When Sampling Times are Possibly Endogenous, Yingying Li, Per Mykland, Eric Renault, Lan Zhang and Xinghua Zheng, Econometric Theory, 30, 2014, 580-605 |
The Leverage Effect Puzzle: Disentangling Sources of Bias at High Frequency, Yacine Ait-Sahalia, Jianqing Fan and Yingying Li, Journal of Financial Economics, 109, 2013, 224-249 |
Volatility Inference in the Presence of Both Endogenous Time and Microstructure Noise, Yingying Li, Zhiyuan Zhang and Xinghua Zheng, Stochastic Processes and their Applications, 123, 2013, 2696-2727 |
Vast Volatility Matrix Estimation using High Frequency Data for Portfolio Selection, Jianqing Fan, Yingying Li and Ke Yu, Journal of the American Statistical Association, 107(497), 2012, 412-428 |
On the Estimation of Integrated Covariance Matrices of High Dimensional Diffusion Processes, Xinghua Zheng and Yingying Li, Annals of Statistics, 39(6), 2011, 3121–3151. Supplementary file |
Microstructure Noise in the Continuous Case: The Pre-Averaging Approach, Jean Jacod, Yingying Li, Per A. Mykland, Mark Podolskij and Mathias Vetter, Stochastic Processes and their Applications, 119(7), 2009, 2249-2276 |
Are Volatility Estimators Robust with Respect to Modeling Assumptions? , Yingying Li and Per A. Mykland, Bernoulli, 13(3), 2007, 601-622 |
Aug 2026: THE THIRD IAS-SBM JOINT WORKSHOP Financial Econometrics in the Big Data Era. - picture.
Jun 2026: Prof. Yingying Li presented 'Site Percolation Network Models for Event-Driven Systems' at 18th Annual Society for Financial Econometrics Conference (SoFiE 2026) in Macau. - picture.
Jun 2026: Prof. Xinghua Zheng presented 'A Factor Hypergraph Model for Stock Co-jump Process' at 18th Annual Society for Financial Econometrics Conference (SoFiE 2026) in Macau. - picture.
Jun 2026: Rohan Sen presented 'Kernel-Based Nonparametric Tests For Shape Constraints' at 18th Annual Society for Financial Econometrics Conference (SoFiE 2026) in Macau. - picture.
Jun 2026: Prof. Yingying Li served as a lecturer and keynote speaker at QFFE 2026 - Quantitative Finance and Financial Econometrics in Marseille, France. - picture.
May 2026: Prof. Xinghua Zheng was appointed as Associate Editor of the Journal of the American Statistical Association.
May 2026: Zhuoxi Li was awarded an RGC Junior Research Fellowship.
May 2026: Junkun Yang received the HKPFS.
May 2026: Ruizhao Huang received the Red Bird Academic Excellence Award.
Mar 2026: Welcome new member Rohan Sen to the lab as a Postdoctoral Researcher.
Feb 2026: Prof. Yingying Li appointed as AE of Management Science.
Jan 2026: Leheng Chen presented 'Efficient Portfolio Estimation in Large Risky Asset Universes' at the CityU Workshop in Econometrics and Statistics (Hong Kong).
Jan 2026: Welcome new member Yimeng Ren to the lab as a Postdoctoral Researcher.
Jan 2026: Prof. Xinghua Zheng appointed as AE of the Journal of Econometrics and Econometric Theory.
Dec 2025: Prof. Yingying Li, Prof. Xinghua Zheng, and Prof. Carsten H. Chong organized the 2025 Annual Meeting of the Greater Bay Econometrics Study Group.
Dec 2025: Shiman Hu presented 'Predicted Factor Model for Jump Intensities' at the 2025 Annual Meeting of the Greater Bay Econometrics Study Group (Hong Kong).
Dec 2025: Ruizhao Huang presented 'MAXSER-C' at the 2025 Annual Meeting of the Greater Bay Econometrics Study Group (Hong Kong).
Dec 2025: Leheng Chen presented 'Efficient Portfolio Estimation in Large Risky Asset Universes' at the 2025 Annual Meeting of the Greater Bay Econometrics Study Group (Hong Kong).
Dec 2025: Qi Fan presented his research at the 2025 Annual Meeting of the Greater Bay Econometrics Study Group (Hong Kong).
Dec 2025: Yingwen Tan presented his research at the 2025 Annual Meeting of the Greater Bay Econometrics Study Group (Hong Kong).
Dec 2025: Zhuoxi Li presented his research at the 2025 Annual Meeting of the Greater Bay Econometrics Study Group (Hong Kong).
Dec 2025: Prof. Yingying Li was named a Fellow of the Journal of Econometrics.
Nov 2025: Prof. Yingying Li was recognized as Fung Term Professor at HKUST's Eighth Inauguration Ceremony of Named Professorships. - picture.
Sep 2025: Prof. Yingying Li awarded NSFC YSF Cat-A.
Sep 2025: Welcome new members Jiawei Wu, Yuheng Wu, and Hongbao Zhang to the lab as Research Assistants.
Aug 2025: Prof. Yingying Li, Prof. Xinghua Zheng, and Prof. Carsten H. Chong organized THE SECOND IAS-SBM JOINT WORKSHOP Financial Econometrics in the Big Data Era. - picture 1 2.
Aug 2025: Shiman Hu presented 'Predicted Factor Model for Jump Intensities' at the 2nd HKUST IAS-SBM Joint Workshop on Financial Econometrics in the Big Data Era (Hong Kong).
Aug 2025: Ruizhao Huang presented 'MAXSER-C' at the 2nd HKUST IAS-SBM Joint Workshop on Financial Econometrics in the Big Data Era (Hong Kong).
Aug 2025: Leheng Chen presented 'Efficient Portfolio Estimation in Large Risky Asset Universes' at the 2nd HKUST IAS-SBM Joint Workshop on Financial Econometrics in the Big Data Era (Hong Kong).
Aug 2025: Leheng Chen presented 'Efficient Portfolio Estimation in Large Risky Asset Universes' at the 2025 Random Matrix Theory and Applications Summer Workshop (Yunnan).
Aug 2025: Welcome new member Haoxuan Lu to the lab as a PhD student.
Aug 2025: Welcome new members Qi Fan, Yingwen Tan, and Zhuoxi Li to the lab as Postdoctoral Researchers.
Aug 2025: Leheng Chen successfully defended his PhD thesis and became Dr. Chen. - picture.
Jun 2025: Prof. Xinghua Zheng presented the paper 'Incorporating Return Prediction in High-dimensional Mean-Variance Portfolio Optimization' at the 17th Annual Society for Financial Econometrics Conference (SoFiE 2025) in Paris.
Jun 2025: Prof. Yingying Li presented the paper 'Predictive Factor Model for Jump Intensities' at the 17th Annual Society for Financial Econometrics Conference (SoFiE 2025) in Paris.
Jun 2025: Prof. Yingying Li served as a plenary speaker at the 19th International Symposium on Econometric Theory and Applications (SETA 2025) in Macau and gave the talk 'Learning the Stochastic Discount Factor'. - picture.
Jun 2025: Shiman Hu presented 'Predicted Factor Model for Jump Intensities' at the 19th International Symposium on Econometric Theory and Applications (SETA 2025) (Macau).
Jun 2025: Leheng Chen presented 'Efficient Portfolio Estimation in Large Risky Asset Universes' at the 19th International Symposium on Econometric Theory and Applications (SETA 2025) (Macau).
Jun 2025: Yibin Zhang successfully defended his PhD thesis and became Dr. Zhang.
May 2025: Haoxuan Lu received the HKPFS.
May 2025: Changlei Lyu successfully defended his PhD thesis and became Dr. Lyu. - picture.
Feb 2025: Prof. Yingying Li was named Fung Term Professor. - picture.
Jan 2025: Juncheng Li successfully defended his PhD thesis and became Dr. Li.
2025: Prof. Xinghua Zheng named Lee Hang Fellow.
Dec 2024: Bicheng Zhan and Junkun Yang joined FinStaR as Research Assistants in November and December.
Dec 2024: Leheng Chen presented 'Efficient Portfolio Estimation in Large Risky Asset Universes' at the First Macau International Conference on Business Intelligence and Analytics (Macau).
Nov 2024: Jian Yuan successfully defended his PhD thesis and became Dr. Yuan. - picture.
Jun 2024: Prof. Yingying Li and Prof. Torben Andersen co-chaired the 16th Annual Society for Financial Econometrics (SoFiE) Conference in Rio de Janeiro, Brazil. - picture.
Jun 2024: Leheng Chen presented 'Robust Large Portfolio Optimization with Heteroscedastic and Heavy-Tailed Returns' at the 16th Society for Financial Econometrics (SoFiE) Annual Conference (Rio de Janeiro).
May 2024: Prof. Yingying Li, Prof. Xinghua Zheng, and Prof. Carsten H. Chong organized a workshop on Financial Econometrics in the Big Data Era. - picture.
May 2024: Prof. Xinghua Zheng and Prof. Yingying Li spoke in the event "AI for Good" hosted by Chicago Booth. - picture 1 2 3 4.
Aug 2023: Guoli Liu successfully defended his PhD thesis and became Dr. Liu. - picture 1 2.
Jul 2023: Prof. Yingying Li was promoted to Chair Professor.
Jul 2023: Prof. Yingying Li was named Senior Research Fellow by the Research Grants Council. - picture.
Jun 2023: Prof. Xinghua Zheng elected as Fellow of the Society for Financial Econometrics (SoFiE). - picture.
Jun 2022: Guoli Liu won the Redbird Academic Excellence Award.
Jun 2022: Leheng Chen won the Redbird PhD Award.
Sep 2021: Prof. Yingying Li gave a talk in the "Cutting-edge Research in Business Studies Series" Live Broadcast via HKUST MBA China, ifeng.com, sohu.com, Tencent (total 216,693 live stream views, watch replay). - picture.
Sep 2021: Welcome new member Ruizhao Huang to the lab.
Sep 2021: Welcome new PhD student Shiman Hu to the lab.
Jul 2021: Prof. Yingying Li was recognized as one of the faculty members who made exceptional achievements in the past academic year. - picture.
Apr 2021: Prof. Yingying Li gave a talk in the UBS Machine Learning & Advanced Portfolio Optimization in UBS Quant Insight Series (Watch replay).
Oct 2020: FinStaR Lab was awarded a grant from HKUST-Kaisa Joint Research Institute on large portfolio optimization.
Sep 2020: Welcome new members Chun Hui and Qingsan Zhu to the lab.
Aug 2020: Welcome new member Jiajun Ma to the lab.
Aug 2020: Dr. Yi Ding has been appointed Research Assistant Professor at the Hong Kong Polytechnic University.
Jul 2020: Prof. Yingying Li presented “Estimating Large Efficient Portfolios with Heteroscedastic Returns” in SoFiE Seminar.
Feb 2020: Welcome new member Leheng Chen to the lab.
Dec 2019: Yi Ding received Dean's PhD Fellowship for Research Excellence 2019-2020.
Nov 2019: Prof. Yingying Li awarded 2019 Excellent Young Scholar, National Natural Science Foundation of China (News in BUSINESS INSIGHT@HKUST and XINHUANET).
Aug 2019: Dr. Bo Zhou has been appointed assistant professor at Durham University.
Jul 2019: Prof. Xinghua Zheng delivered a keynote speech at the 2nd Annual Conference of the Institute of Financial Econometrics and Risk Management of Chinese Society of Management Science and Engineering.
Jul 2019: Prof. Yingying Li was promoted to Full Professor.
Jun 2019: Prof. Yingying Li delivered an invited theme talk at the 12th Annual Meeting of the Society for Financial Econometrics (SoFiE 2019) in Shanghai. - picture.
Jun 2019: Prof. Yingying Li elected as a Council member of SoFiE.
Jun 2019: Yi Ding received SoFiE 2019 Shanghai Conference Travel Grant from New York University.
May 2019: Wen Luo has been employed as a FOF analyst at ZIAsset.
Dec 2018: Prof. Yingying Li was recognized as one of the faculty members who made exceptional achievements in the past academic year. - picture.
Oct 2018: Welcome new members Changlei Lyu and Lingling Zhao to the lab.
Sep 2018: Prof. Yingying Li has been appointed AE of Journal of Business & Economic Statistics.
Aug 2018: Dr. Xinxin Yang has been appointed assistant professor in C.U.F.E.(中央财经大学).
Aug 2018: Welcome new members Juncheng Li and Guoli Liu to the lab.
Jul 2018: Welcome new member Wen Luo to the lab.
Aug 2017: Welcome new member Bo Zhou to the lab.
Aug 2017: Dr. Xinxin Yang successfully defended her PhD thesis.
Aug 2017: Yi Ding successfully defended Master thesis.
Aug 2017: Prof. Yingying Li served as a judge for the final round of HSBC Financial Dialogue FinTech Challenge.
Jul 2017: Yi Ding received Research Travel Grant of HKUST 2016-17.
Jun 2017: Prof. Yingying Li elected SoFiE Fellow.
Jun 2017: Prof. Xinghua Zheng has been appointed AE of Statistica Sinica.
Jan 2017: Prof. Yingying Li has been appointed AE of Journal of Econometrics.
Jan 2017: Prof. Yingying Li has been appointed AE of Journal of Financial Econometrics.
Oct 2016: Yi Ding obtained Dean’s PhD Fellowship for the academic year 2016-17.
Jun 2016: HKUST IAS Quantitative Finance and Fintech Mini Workshop. - picture.
Jun 2016: The Society for Financial Econometrics (SoFiE) Annual Conference 2016. - picture.
Jun 2016: Dr. Mengmeng Ao has been appointed Assistant Professor in Xiamen University(厦门大学).
Sep 2015: Welcome new member Yi Ding to the lab.
Aug 2015: Welcome new member Cheng Zhou to the lab.
Jul 2015: Welcome new member Weiyang Wen to the lab.
Jun 2014: Dr. Ningning Xia has been appointed assistant professor in S.H.U.F.E.(上海财经大学).
2013: The 2nd HKUST International Forum on Probability and Statistics. Watch the video. - picture.
2013: The 1st HKUST International Forum on Probability and Statistics. - picture.
Jun 2012: Dr. Zhiyuan Zhang has been appointed assistant professor in S.H.U.F.E.(上海财经大学).
Post-doctoral researcher and RA positions are available.
Applications with a strong background in statistics and experience in coding are particularly welcomed. Interested applicants please send application letter and CV to xhzheng at ust.hk and yyli at ust.hk