(212) 555-0166 ◇ New York, NY
wei-lin.tsao@example.com ◇ linkedin.com/in/wei-lin-tsao ◇ weilintsao.com
Quantitative researcher with 7 years in systematic equity strategies, currently a senior quant at a $6B multi-strategy hedge fund developing mid-frequency signals for a $1.2B statistical arbitrage book. Built 9 production signals contributing about 35% of book alpha, raised the book Sharpe ratio from 1.4 to 2.1 over 3 years through signal combination and risk model improvements, and cut backtest-to-live performance decay from 40% to 12% through a rigorous validation framework. Writes research that survives contact with live markets, and kills ideas early when the data says so.
Dissertation on high-dimensional covariance estimation for financial time series. Coursework in Statistical Learning, Stochastic Processes, Time Series, and Optimisation.
Graduated with highest honours. Coursework in Real Analysis, Probability, Algorithms, Numerical Methods, and Machine Learning.
- Develop mid-frequency equity signals for a $1.2B statistical arbitrage book at a $6B multi-strategy hedge fund, on a research team of 8 supporting 2 portfolio managers.
- Built 9 production signals across 3,000 global equities contributing about 35% of book alpha, and raised the book Sharpe ratio from 1.4 to 2.1 over 3 years through signal combination and a rebuilt risk model.
- Cut backtest-to-live performance decay from 40% to 12% through a validation framework with out-of-sample holdouts, multiple comparison control, and transaction cost stress tests, adopted by the full research team.
- Researched cross-sectional equity signals for a $4B systematic fund over 3.5 years, with 5 signals reaching production.
- Built a transaction cost model calibrated on 2 years of execution data that cut realised slippage 18% on a $4B book.
- Evaluated 30 alternative datasets and onboarded 4 that added an estimated 0.3 to the fund Sharpe ratio.
- Researched a short-horizon reversal signal during a 12-week internship that reached production with a 0.8 standalone Sharpe ratio.
- Built a covariance estimation library in Python used by 6 researchers.
- Received a full-time offer at the end of the 12-week internship based on the reversal signal.
Signal Validation Framework. Designed a research validation framework with a locked out-of-sample period, a false discovery rate control across about 400 candidate signals a year, transaction cost stress tests at 3 levels, and a live paper trading stage of 3 months, adopted by 8 researchers, which cut backtest-to-live decay from 40% to 12% and cut signals retired within 6 months of launch from 5 a year to 1.
Risk Model Rebuild. Rebuilt the book risk model with 40 style and industry factors, a shrinkage covariance estimator from doctoral research, and a daily recalibration, validated on 10 years of history and 3 stress periods, which cut realised volatility 22% at the same expected return and contributed about 0.4 to the 0.7-point Sharpe ratio improvement.
Alternative Data Signal. Built a signal from 3 years of anonymised transaction data covering 800 consumer companies, with an entity matching pipeline, a revenue nowcast model, and an event study around earnings, which reached production with a 1.1 standalone Sharpe ratio and a 0.15 correlation to existing signals and contributes about 8% of book alpha.
- Author of 4 peer-reviewed papers on covariance estimation and a speaker at 3 quantitative finance conferences.
- Volunteer mentor for a quantitative finance programme, coaching about 4 graduate students a year.
- Play competitive Go, rated about 3 dan, in about 6 tournaments a year.
- Lead the signal research agenda for a $1.2B book and review all research reaching production for a team of 8.
- Mentored 4 junior researchers, 2 of whom now run their own signal families.
- Present research results and risk model changes to 2 portfolio managers weekly and the chief investment officer quarterly.

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