Price-Conditioned Amplitude and Turnover Factors in Chinese Equities

Summary

This study examines the low-volatility effect in Chinese A-shares using price amplitude as a volatility proxy. The original amplitude factor has negative stock-selection ability, but its performance is unstable: the reported monthly IC and rank IC are negative, five-group returns are not monotonic, and short positions contribute most of the long-short return. The results describe historical tests and do not establish that the effect will persist.

The authors split amplitude into high-price and low-price components, finding stronger negative selection information in the high-price component and weaker information at lower prices. They then standardize the high-price component cross-sectionally and subtract the low-price component to create an “ideal” amplitude factor. Its reported long-short return, volatility, and stability improve relative to the high-price factor. Applying the same construction to turnover also reportedly improves selection ability. The excerpt gives selected performance statistics but omits the underlying paper’s full methodology, sample dates, transaction-cost assumptions, and robustness checks, so the results cannot be independently assessed from this text alone.

Key ideas

• The raw amplitude factor shows negative stock-selection ability, but its reported stability is weak.
• Splitting amplitude by price level reveals stronger negative selection information among higher-priced stocks.
• The proposed ideal amplitude factor is formed by standardizing high-price amplitude and subtracting low-price amplitude.
• The same price-conditioned construction is applied to turnover and is reported to improve its selection ability.
• The excerpt does not provide enough backtest details to judge costs, robustness, or out-of-sample performance.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.