নলেজ লাইব্রেরি

This article introduces alpha and beta through market and multifactor models, describing alpha as return unexplained by modeled risk exposures. It explains how active portfolios might seek positive alpha while keeping factor exposures aligned with a…

This document explains the PB-ROE framework as a valuation relationship: higher expected return on equity is associated with higher price-to-book multiples, with log PB described as linearly related to expected ROE. It reviews the theoretical basis and…

This document profiles the China Securities Consumer Leaders Index, which selects 50 large, higher-quality companies from the discretionary and staple consumer sectors across the Shanghai and Shenzhen markets. It is intended to represent leading consumer…

This study describes using the CCK model to identify herding in Chinese equity indices. Herding is associated with constituents moving in the same direction: their return correlations rise while the cross-sectional dispersion of returns falls. The analysis…

This forum exchange addresses an error encountered when adding a code-list module to a factor analysis workflow. The reply explains that the code-list module returns a dictionary rather than a DataSource object, which is the type expected by the factor…

This forum question compares the first dates that three rolling SQL calculations return values: a moving average, a standard deviation, and a regression slope, each configured with a 40-observation window. The example applies them to stock data and reports…

Maximum drawdown measures the largest percentage decline from a previous peak to a later trough over a chosen observation period. The document gives the formula and explains that the peak must come before the trough, then walks through a stock price sequence…

A user asks about an error in a shared quantitative strategy. The response points to a mismatch between the data universe and the requested features: index data does not provide certain return and price fields that are available for stocks, futures, or…

This article discusses the difficulties faced by quantitative index-enhancement funds after a period of rapid product launches and asset growth. It reports that some funds failed to generate positive alpha, lagged their benchmarks, or experienced declines in…

This brief BigQuant post reports a test combining rolling model training with LightGBM and an experimental factor described as “暗流涌动” (roughly, hidden currents). The author says the factor's standalone effect is not prominent, but it may contribute something…

This short BigQuant support note addresses a rolling-training workflow failure. It explains that a custom module was continuing to read data from an earlier module instead of receiving data that changed with the rolling time window. As a result, a later…

This article explains sharp intraday stock rallies through changes in order book liquidity. It argues that price movement depends less on aggregate figures for aggressive buying and selling than on whether market buys consume the resting sell orders ahead of…

This note proposes an equity factor that adds cross-sectional percentile ranks for year-over-year growth in recent net profit, the negative of a ten-period turnover sum, and the negative of total market capitalization. The intended interpretation is that…

This commodity research framework organizes iron ore price drivers into fundamental supply, demand, and inventory factors, alongside a separate sentiment category. It discusses practical handling of slower and irregularly updated fundamental data, including…

The report groups stocks into seven broad sleeves, including financials, technology and media, consumer, cyclical, manufacturing, healthcare, and Hong Kong equities. It examines active domestic equity fund allocations, noting shifts away from consumer stocks…

This research summary describes a method for grouping stocks with similar price behavior so that an investor can substitute one holding for another within a group. It builds on a grouping genetic algorithm, representing groups, stocks, and portfolio…

The note examines an attempted A-share stock-selection strategy that combined dividend yield and price-to-sales signals with equal scoring weights while retaining both screens. The author reports that the combined strategy backtested substantially worse than…

This brief BigQuant support exchange addresses a runtime error stating that a NoneType value is not iterable. The answer attributes the problem to data containing missing or abnormal values, such as absent factor values or gaps in the underlying data. It…

This Chinese equity screen combines a daily price-range condition, a reversal pattern, and opening-auction activity. It first filters for stocks whose high-to-low range exceeds one percent, then looks for a reversal, and finally ranks qualifying names by…

More Chan Theory is presented as a practical simplification of Chan-style price analysis. It drops the traditional recursive pen-and-segment hierarchy, using two levels: the current-level pivot and lower-level segments. The method uses MA5 and MA34 to help…

This programming note explains how to keep a rolling cache of recent bars for use in strategies that calculate time-series indicators from live data. A bounded array is updated from bar callbacks, and strategy logic waits until the cache is initialized…

This research note organizes convertible-bond factors into three groups: factors from the underlying stock, factors describing the bond-stock relationship, and the convertible bond’s own price and volume behavior. It reports that earnings yield and…

This research overview presents a framework for studying high-frequency equity factors, emphasizing both incremental information and the economic logic behind observed returns. It uses linear models, factor statistics, and portfolio backtests to assess a…

The article describes a workflow for finding S&P 500 healthcare companies that develop or use AI. It filters the index by industry, gathers recent company news, and uses a large language model to summarize products, technologies, and research activity.…