Pairs trading: does volatility timing matter?

Pairs trading is a dollar-neutral trading strategy. Using the components of two major stock indices, the S&P 500 and the Nikkei 225, this article deals with the performance of a pairs trading system based on various pairs selection methods (distance, stationarity, cointegration) over a 10-year period. On both markets, using a classical framework, cointegration appears superior and effective. On the U.S. market and also in Japan to a lower extent, pairs trading strategies exhibited an impressive performance during the 2008 financial crisis. Bearish periods are associated with a high level of the VIX index: the ‘investor fear gauge’. Using a modified trading system, this article examines the link between pairs trading performance and volatility/VIX timing. It is shown that for the best selection technique (cointegration), timing volatility has no economic value in a pairs trading context.     

空间套汇的条件

一般文献对于空间套汇的条件缺乏深入严谨的分析,为弥补这一缺陷,本文尝试在严格考虑到外汇银行对同一外汇买卖汇率报价不同的基础上,对空间套汇的条件做了较为深入严谨的讨论和分析,给出了不存在空间套汇机会的充分必要条件及其若干重要推论。     

Market Efficiency Reloaded: Why Insider Trades do not Reveal Exploitable Information

Abstract. Several studies have emphasized a slow price adjustment to reported insider trades for Germany. The results presented in this paper, though, show that this is mainly caused by a subset of high arbitrage risk stocks. In fact, the abnormal return difference between the quintiles of stocks with highest and lowest idiosyncratic risk is in the range of 2.99–4.90% over a 20‐day interval. These results are robust even in the context of a joint generalized least squares approach. By developing a simple zero‐investment arbitrage trading strategy mimicking insider trades, it turns out that such a trading strategy, in most cases, generates significant positive returns as long as transaction costs are neglected. However, the outperformance disappears in all risk quintiles, if bid/ask spreads are taken into account. We conclude that the market's under‐reaction to reported insider trades can mainly be explained by the cost of risky arbitrage and is therefore not exploitable.     

Is the efficient market hypothesis day-of-the-week dependent? Evidence from the banking sector

In this article, we propose a new hypothesis: that the efficient market hypothesis is day-of-the-week-dependent. We apply the test to firms belonging to the banking sector and listed on the NYSE. We find significant evidence that the efficient market hypothesis is day-of-the-week-dependent. Overall, for only 62% of firms, the unit root null hypothesis is rejected on all the five trading days. We also discover that when investors do not account for unit root properties in devising trading strategies, they obtain spurious profits.     

运用沪深300股指期货进行期现套利

本文就股票市场与股指期货市场之间的套利机会与套利利润进行了研究,运用持有成本模型对股指期货进行定价,根据股指期货合约的理论价值与市场交易成本,测算无套利区间。本文完整地展现和实证了利用沪深300股指期货和ETF组合进行期现套利的全过程,发现目前模拟的股指期货合约走势基本运行在无套利区间之外,套利利润空间巨大。     

Optimal trading strategies for Lévy-driven Ornstein–Uhlenbeck processes

This study derives an optimal pairs trading strategy based on a Lévy-driven Ornstein–Uhlenbeck process and applies it to high-frequency data of the S&P 500 constituents from 1998 to 2015. Our model provides optimal entry and exit signals by maximizing the expected return expressed in terms of the first-passage time of the spread process. An explicit representation of the strategy’s objective function allows for direct optimization without Monte Carlo methods. Categorizing the data sample into 10 economic sectors, we depict both the performance of each sector and the efficiency of the strategy in general. Results from empirical back-testing show strong support for the profitability of the model with returns after transaction costs ranging from 31.90% p.a. for the sector ‘Consumer Staples’ to 278.61% p.a. for the sector ‘Financials’. We find that the remarkable returns across all economic sectors are strongly driven by model parameters and sector size. Jump intensity decreases over time with strong outliers in times of high market turmoil. The value-add of our Lévy-based model is demonstrated by benchmarking it with quantitative strategies based on Brownian motion-driven processes.     

利率平价理论评析

利率平价理论是阐述国内外利率水平差异对一国货币汇率起决定作用的基本学说。国内外许多学者对该理论进行了研究,但对于利率平价理论在不同国家成立与否得出了不同的结论。对国外不同发展阶段的利率平价理论进行梳理,并把国内学者对该理论的研究归纳为利率平价理论的适用性、利率-汇率联动性、模型修正等,可以发现,引入资产价格因素对利率平价理论进行拓展并在此基础上进一步深化中国金融体制改革,可以为货币政策制定者提供具有理论价值和应用价值的政策指导。     

组合、套利和资本市场的均衡特征——对资本市场均衡“异化”现象的一种解释

无套利均衡是新古典主义理论在特定条件下所界定的市场均衡特征。考察卖空限制和借款约束行为对资本市场上的组合和套利行为的影响,并结合市场从非均衡向均衡的调整过程,定性考察不同行为假设之下资本市场均衡特征的变化,可以发现,资本市场均衡和套利机会之间的共存或排斥状态,直接受制于有关市场参与者的初始行为假设。在不同的行为假设之下,市场参与者的组合和套利行为具有不同的特征和不同的影响。     

关于开放式基金VaR风险的比较——基于半参数与非参数法

在刻画和估计资产联合损失分布函数的基础上对开放式基金VaR风险进行比较分析。在极值情况下有两种算法：一种是半参数法,采用GPD分布来拟合损失分布的尾部和核密度分布拟合损失分布的中间部分,运用copula函数来刻画资产损失的相依结构;另一种是非参数法,用Bootstrapping和FHS方法对收益率进行抽样和模拟。经过实证分析发现在较低置信水平下,宜于采用非参数法;而在较高置信水平下,采用半参数法则更合适,这也充分说明半参数法适合在更极值情形下对开放式基金估计VaR风险。     

我国排污权交易污染因子和交易区域的选取策略研究

梳理我国排污权交易污染因子和交易区域选取现状,总结污染因子和交易区域选取的特点,分析目前尚存在的问题,探索排污权交易污染因子和交易区域选取的原则,结果表明:(1)目前我国开展排污权交易的选取的污染因子不科学,交易区域选取过于行政化;(2)试点污染物的选取应综合考虑污染物特性、监测能力及总量因素;(3)交易区域的选取应综合考虑污染源数量、扩散特性及污染程度等因素。     

基于风险溢价的虚拟经济体与现实经济体间的资本流动分析

从网络虚拟经济与现实经济的关系出发,发现人们身份的转换和资本的流动是虚拟与现实世界之间最主要的、动态的联系渠道。探寻了影响套利资本在现实经济体和网络虚拟经济体间流动的因素和机理,建立了基于经济风险溢价的虚拟-现实套利资本流动模型。最后,对游戏运营商如何避免套利资本的冲击、维护虚拟经济的长期稳定和健康发展提出了建设性的建议。     

\"制度性套利\"与我国管理层收购行为的分析

重点就我国MBO对公司绩效改善不显著的原因进行分析:由于我国资本市场制度性缺陷,导致MBO中管理层追求\"制度性套利空间\"的动因强化和行为扭曲;MBO前、MBO中和MBO后的各种扭曲行为,不利于公司绩效的改善.