市场状态依赖视角下ETF对成分股风险的动态影响研究OA

As an important financial innovation in the capital market,exchange-tra-ded funds(ETF)improve market efficiency,while its actual impact on constituent stock risks remains to be further explored.Based on the panel data of China's A-share market from 2011 to 2025,this paper adopts the panel regression model to systematically examine the mechanism and linkage effect of ETFs on constituent stock volatility.Taking ETF shareholding ratio as the core perspective,this paper e-liminates the influence of general institutional shareholding and identifies the inde-pendent effect of unique ETF mechanisms.With China Volatility Index(CVIX)as the moderating variable,it captures the heterogeneity of market states and reveals the dynamic transformation law of ETF risk effects.Using index constituent adjust-ment as exogenous shock,this paper solves reverse causality and sample self-selec-tion bias to strengthen the reliability of causal inference.The research shows that the impact of ETFs on constituent stock risks has obvious state dependence.In sta-ble market conditions,ETFs act as a stabilizer by boosting market liquidity and ar-bitrage efficiency.During extreme market fluctuations,its bundled trading mecha-nism transmits selling pressure synchronously and turns into a risk amplifier.This paper constructs a unified explanatory framework for risk buffer theory and risk diffusion theory,provides a new perspective for understanding the dual-edged sword effect of ETFs,and offers practical references for regulators to optimize ETF supervision system and promote high-quality development of the capital market.