用动态路由选策略,让投资风险控制更适应市场变化。
Beyond Forecasting: Recasting Volatility Control as a Routing Problem

- 将波动率控制转化为状态驱动的策略路由选择。
- 在多个市场中提升夏普比率,最大回撤降低17%以上。
- 适合追求自适应风险控制的量化交易者或机构投资者。
波动率控制将风险估计转化为投资仓位,但现有方法常依赖固定估计器或预设规则,难以适应市场变化。本文提出 VolRouter,一个模块化框架,将波动率控制建模为基于市场状态的估计器-控制器对的路由选择。该框架通过三阶段完成:状态推断、开关审查与配对选择。路由器可采用规则、可学习或大模型决策模块,而投资动作仍由预定义策略生成。在标普500、多资产、比特币和美元稳定币(USDT)场景下评估显示,VolRouter在其中三个场景中取得最高夏普比率。在标普500上,其夏普比率从0.952提升至1.222,最大回撤由15.10%降至12.58%,日度条件风险价值(CVaR)从1.76%降至1.32%。多资产场景中,夏普比率从1.498升至1.540,CVaR由1.56%降至1.18%。比特币表现类似,而USDT场景中简单状态感知选择器仍具竞争力。消融实验表明,性能提升源于相对策略评估与选择性持续切换,而非单纯扩充策略库。结果表明,当风险管理需求随市场状态变化时,波动率控制可视为一种策略选择问题。
原文摘要 · Abstract (English)
Volatility control converts risk estimates into portfolio exposure, yet existing approaches often rely on a fixed volatility estimator or a pre-defined control rule that may not adapt to changing market conditions. We propose VolRouter, a modular framework that formulates volatility control as state-conditioned routing over estimator-controller pairs. VolRouter first summarizes market conditions into a control-relevant state profile and then performs routing through three stages: state inference, switch review, and pair selection. The Router can be implemented using rule-based, learnable, or LLM-based decision modules, while portfolio actions remain generated by predefined control policies. We evaluate VolRouter across S&P 500, Multi-Asset, Bitcoin, and USDT volatility-control settings. VolRouter achieves the highest Sharpe ratio in three of four settings. On S&P 500, it improves Sharpe from 0.952 for RV + Naive Scaling to 1.222 while reducing maximum drawdown from 15.10% to 12.58% and daily CVaR from 1.76% to 1.32%. On Multi-Asset, it improves Sharpe from 1.498 to 1.540 and reduces CVaR from 1.56% to 1.18%. Bitcoin shows similar improvements in risk-adjusted performance, while USDT provides a boundary case where simpler state-aware selectors remain competitive. Ablation and sensitivity analyses show that the improvement comes from relative policy evaluation and selective persistent switching rather than simply expanding the policy library. These results suggest that volatility control can be viewed as a policy-selection problem when risk management requirements vary across market states.
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