Data and backtesting
Market data platform
quant-market-data-platform
Collects, standardizes and checks market data, publishing versioned assets for research and backtesting. Current work focuses on mainland China.
Richard / runchengxie
Market research notes.
Tools in practice.
Hi, I’m Richard. I build quantitative research and trading tools, working on market data, factors and models, portfolio construction and backtesting. I also write about investment cases and long-term investing.
Start with the published work
All projects →01
Market research
Studies of indices and ETFs, liquidity, trading capacity, microcaps and style factors, with public methods and reviewed results.
02Factor observatory
Browse factor definitions, data quality, study progress and reviewed aggregate results. Some views use demonstration samples; see each study for its scope.
03Market reports
Read daily and weekly market reports, with source evidence, data completeness and publication times.
Selected projects
How the projects connect →From preparing data to testing ideas and publishing results. Each project owns a part of the work, connected through documented formats and interfaces.
Data and backtesting
Research and backtesting framework
quant-platform
Provides portfolio construction, backtesting, risk analysis and execution simulation, with documented formats for exchanging research results.
Trading and experiments
Global market research
global-market-research
Cross-market strategy and factor research, with offline examples and historical experiment reports. Paper trading and competition strategies require separate validation.
Investing and reflection
All articles →Buffett case studies, business research and investment decisions worth revisiting.
Buffett's Two Airline Investments and Their Outcomes
Buffett invested in U.S. airlines on two separate occasions. The first was in 1989, when he bought convertible preferred stock in USAir, later renamed US Airways. The second began in 2016, when he…
Buffett's Two Irish Bank Investments
Berkshire spent $244 million on two Irish bank stocks in 2008; their year-end value was just $27 million. Buffett acknowledged misjudging their apparent cheapness. The year-end marks illustrate how…
Why Buffett Sold Tesco Too Slowly
Buffett had concerns about Tesco's management in 2013 but sold only part of the holding. As operating and accounting problems worsened, Berkshire ultimately recorded an approximately $444 million…