应对最严重危机的最佳策略

Michael Cook, Edward Hoyle, M. Sargaison, Daniel J. Taylor, Otto Van Hemert
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引用次数: 3

摘要

众所周知,为股票投资组合对冲大幅缩水的风险既困难又昂贵。持有并持续滚动标准普尔500指数的平价看跌期权是一种非常昂贵的策略,如果可靠的话,可以防止市场抛售。持有“避险”的美国国债,虽然能提供正的、可预测的长期收益率,但通常是一种不可靠的危机对冲策略,因为2000年后债券与股票的负相关性在历史上是罕见的。就成本和可靠性而言,做多黄金和做多信用保护投资组合似乎介于看跌期权和债券之间。与这些被动投资相反,我们研究了两种动态策略,这两种策略似乎在长期,尤其是在历史危机期间都产生了积极的表现:期货时间序列动量和优质股票因素。期货动能与多头期权跨界交易策略相似,使其在股市长期抛售期间受益。优质股策略是在质量最高的公司股票上做多,在质量最低的公司股票上做空,从危机期间的“逃向优质股”效应中获益。这两种动态策略在历史上具有不相关的回报曲线,使它们成为互补的危机风险对冲。我们研究了这两种策略,并讨论了1985年至2016年期间,不同的变化在危机和正常时期的表现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Best Strategies for the Worst Crises
Hedging equity portfolios against the risk of large drawdowns is notoriously difficult and expensive. Holding, and continuously rolling, at-the-money put options on the S&P 500 is a very costly, if reliable, strategy to protect against market sell-offs. Holding ‘safe-haven’ US Treasury bonds, while providing a positive and predictable long-term yield, is generally an unreliable crisis-hedge strategy, since the post-2000 negative bond-equity correlation is a historical rarity. Long gold and long credit protection portfolios appear to sit between puts and bonds in terms of both cost and reliability. In contrast to these passive investments, we investigate two dynamic strategies that appear to have generated positive performance in both the long-run but also particularly during historical crises: futures time-series momentum and quality stock factors. Futures momentum has parallels with long option straddle strategies, allowing it to benefit during extended equity sell-offs. The quality stock strategy takes long positions in highest-quality and short positions in lowest-quality company stocks, benefitting from a ‘flight-to-quality’ effect during crises. These two dynamic strategies historically have uncorrelated return profiles, making them complementary crisis risk hedges. We examine both strategies and discuss how different variations may have performed in crises, as well as normal times, over the years 1985 to 2016.
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