In recent years, market observers have noted a weakening of the so-called ‘equity-bond seesaw effect.’ This phenomenon traditionally refers to the inverse relationship between stock and bond markets: when equities rise, bonds tend to fall, and vice versa. The dynamic stems from shifts in investor risk appetite—capital flows into equities during risk-on periods and into bonds as a safe haven during risk-off phases. However, this historical pattern has become less reliable. On one hand, persistent global inflation and tightening monetary policies have led to simultaneous sell-offs in both equities and bonds (‘risk-off’ hitting both assets). On the other hand, favorable economic outlooks or policy stimuli can sometimes drive both markets higher together. Additionally, the growing prevalence of quantitative trading, passive investing, and cross-asset arbitrage strategies has further eroded traditional correlations. The weakening of the equity-bond seesaw effect implies that investors can no longer rely solely on historical relationships for hedging. Instead, they must adopt more nuanced analyses of macroeconomic conditions, policy directions, and market sentiment to construct effective, diversified investment strategies.
近年来，市场观察到‘股债跷跷板效应’有所走弱。所谓‘股债跷跷板效应’，是指股票和债券市场通常呈现负相关关系：当股市上涨时，债市往往下跌；反之亦然。这种现象源于投资者在风险偏好变化下的资产配置调整——风险偏好上升时资金流向股市，风险厌恶时则转向债市避险。然而，近期这一规律不再如以往明显。一方面，全球通胀高企、货币政策收紧导致股债双杀，即股票和债券同时下跌；另一方面，在某些经济预期改善或政策利好出台时，股债也可能同步上涨。此外，量化交易、被动投资及跨资产套利策略的普及，也削弱了传统资产间的相关性逻辑。股债跷跷板效应走弱，意味着投资者不能再简单依赖历史经验进行资产对冲，而需更精细化地分析宏观环境、政策导向与市场情绪，以制定更有效的多元化投资策略。
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