均值-方差模型
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中泰资管天团 | 唐军:配置是个“体力活”
中泰证券资管· 2025-11-06 11:39
Core Viewpoint - Asset allocation is a complex and multi-dimensional task, often referred to as "physical labor" due to the extensive research required to achieve effective configurations [1][2][27]. Group 1: Passive vs. Active Allocation - Passive allocation, which relies on diversification to reduce volatility, faces challenges in practice, particularly for domestic investors due to limited asset classes and the poor performance of key assets like A-shares [5][9][27]. - Active allocation aims to enhance returns beyond passive strategies by making informed predictions about expected returns, addressing the shortcomings of passive allocation [2][27]. Group 2: Issues with Passive Allocation - Determining expected returns using historical data can lead to "chasing performance," where investors favor assets that have recently performed well, skewing allocation models [5][9]. - The correlation between assets is not stable; for instance, the historical negative correlation between U.S. stocks and bonds has weakened since the 2008 financial crisis, impacting the effectiveness of diversification [6][9]. - The performance of passive allocation is heavily dependent on the underlying assets' returns and their correlations, which can be problematic in markets with limited asset classes [9][27]. Group 3: The Complexity of Active Allocation - Active allocation involves timing decisions, which many investors find challenging, leading to skepticism about its feasibility [17][19]. - While achieving a high accuracy rate in timing is difficult, even a modest success rate can significantly enhance investment returns when combined with sound risk management [18][19]. - The macroeconomic drivers influencing asset performance can change, necessitating continuous adjustments to research frameworks and strategies [21][27]. Group 4: Multi-Dimensional Decision Making - Effective asset allocation requires multiple low-correlation return streams to improve the probability of successful outcomes, as relying on a single asset is often insufficient [22][23]. - A structured decision-making framework that incorporates both strategic and tactical allocations can enhance the robustness of investment strategies [23][24]. - Strict risk budgeting is essential to ensure that asset allocations align with the overall risk tolerance of the portfolio, preventing forced liquidations during market fluctuations [24][25].
一个“反脆弱”的投资策略,能在波动中为你赚钱
雪球· 2025-07-09 10:46
Group 1 - The core idea of the article emphasizes the importance of asset allocation as a means for ordinary investors to navigate the uncertainties of the financial market, likening it to Noah's Ark for survival and growth [2][3] - The article discusses the theoretical foundation of asset allocation, highlighting Harry Markowitz's mean-variance model and its significance in reducing risk through the scientific combination of low-correlated assets [4] - It presents empirical evidence showing that 91% of mutual fund performance differences from 1970 to 2020 were due to asset allocation strategies rather than stock selection or market timing [4] Group 2 - The practical value of asset allocation is illustrated through examples of risk diversification, such as the "see-saw effect" between stocks and bonds during market downturns, which can significantly reduce portfolio drawdowns [5] - Behavioral finance insights are shared, indicating that proper asset allocation can mitigate emotional responses during market volatility, reducing the psychological impact of asset fluctuations [5] - The article provides a performance comparison of a diversified asset allocation strategy from 2010 to 2020, showing an annualized return of 7.2% with a maximum drawdown of only 9.8% [5] Group 3 - The article outlines strategic tools for asset allocation, including the "Four Seasons" method that adjusts asset allocation based on economic cycles [6] - It discusses lifecycle-based asset allocation, recommending different asset mixes for various age groups to align risk exposure with life stages [7] - The use of various financial instruments, such as ETFs, convertible bonds, and REITs, is suggested to enhance portfolio diversification and returns [8] Group 4 - Historical lessons are drawn from past financial crises, demonstrating the effectiveness of diversified asset allocation strategies in mitigating losses compared to concentrated positions [9][10] - The article highlights the performance of Bridgewater's All Weather strategy during periods of economic stress, showcasing its ability to generate positive returns while traditional equities suffered losses [10] Group 5 - The future of asset allocation is discussed in the context of technological advancements, including big data, AI optimization, and blockchain, which are transforming the investment landscape [11] - The article concludes with a philosophy of viewing asset allocation as a means to achieve financial security and stability rather than speculative gains, emphasizing disciplined investment practices [12][13] Group 6 - The "Snowball Three-Part Method" is introduced as a risk management framework that balances stocks, bonds, and commodities to create a defensive investment strategy [26][27] - The method emphasizes dynamic rebalancing to maintain target asset allocations and enhance returns through systematic adjustments based on market conditions [28] - The article discusses the potential for generating excess returns through strategic asset allocation, including timing and sector rotation based on market conditions [30] Group 7 - A proposed asset allocation strategy is presented, incorporating global assets, bonds, A-shares, and alternative investments to create a robust defensive structure [34][36] - The strategy aims to mitigate geopolitical risks through diversified global exposure and balance between interest rate and credit risk [37] - The allocation includes a focus on high-dividend assets to provide stability during market downturns, reinforcing the importance of income-generating investments [38] Group 8 - The article emphasizes the importance of dynamic balancing and threshold management in maintaining optimal asset allocations, ensuring that portfolios remain aligned with market conditions [44] - It discusses the need for liquidity management to address unexpected redemption demands, highlighting the role of cash and cash-equivalent assets [53] - The overall philosophy of the proposed asset allocation strategy is to build a "anti-fragile" investment system capable of withstanding market volatility while capturing structural opportunities [54][55]