【广发宏观陈礼清】如何量化“叙事”对资产定价的影响

Core Viewpoint - The article discusses the impact of "narrative trading" on asset pricing, emphasizing that asset pricing is influenced not only by fundamentals but also by popular narratives such as the restructuring of the dollar credit system and the new technological revolution [1][12]. Group 1: Narrative Economics - The influence of narratives on economic phenomena consists of a series of elements: a popular, easily spread story, public behavior, and an epidemiological model for macro-level dissemination [2][16]. - The concept of "herding behavior" is used to illustrate how narratives affect micro-level decision-making, with varying strengths across different phases of narrative development [2][18]. Group 2: Herding Effect in Asset Allocation - Traditional studies of herding behavior focus on individual stocks and short-term market sentiment, but the current narrative-driven environment poses challenges for asset allocation due to the breakdown of continuity in global fiscal, monetary, and trade environments [3][20]. - The article suggests that the herding effect can be quantified and applied to investment portfolio optimization and asset timing strategies [3][20]. Group 3: Measurement of Herding Effect - Four common indicators of herding behavior are identified: Cross-Sectional Absolute Deviation (CSAD), the quadratic coefficient of return dispersion, standard deviation of beta coefficients, and cross-correlation [4][23]. - The CSAD index, which measures the deviation of asset returns from the average, indicates the presence of herding behavior when returns cluster around a certain average level [4][23]. Group 4: Current State of Herding Effect - The CSAD index for major asset classes shows a right-skewed distribution, indicating a tendency for extreme herding behavior, with a mean-reverting characteristic suggesting that extreme trends are difficult to maintain [5][28]. - Since May 2025, the CSAD has decreased significantly, indicating a rapid herding effect, but has started to rebound slightly, suggesting a potential shift towards more balanced asset performance [5][28]. Group 5: Strategy Integration - The article proposes integrating the herding factor into a macro risk parity framework, which has shown superior annualized returns compared to traditional models [6][34]. - The new framework suggests increasing allocations to equities and commodities while reducing bond exposure, indicating a shift in investment strategy based on herding behavior [6][34]. Group 6: Domestic Equity Market Analysis - The herding effect in the domestic equity market, as measured by the CSAD, has shown a decline in right-skewness, indicating lower dispersion compared to historical levels [7][40]. - The herding effect has gone through phases of fermentation, intensification, and now a slight loosening, suggesting a gradual return to individual rationality among investors [7][40].