Arbitrage with hedging by forward contracts: exploited and exploitable profits

The theoretical conditions for covered interest arbitrage and exploitable profit opportunities out of simple and triangular arbitrage in the absence and presence of market imperfection are enunciated. A distinction is made between pure arbitrage profits and arbitrage-induced total profits attainable under the risk-free environment. Operational feasibility of iterative arbitrage is also examined.     

人民币预期汇率变动与虚假贸易——基于套汇视角的分析

虚假贸易对国内经济秩序造成不良影响,受到了密切关注。本文基于2010—2012年中国大陆到香港的月度出口数据,实证检验了人民币汇率出现单边预期以及资本管制的大背景下,企业出于套汇动机而进行的虚假贸易行为。本文发现远期汇率升值显著促进了产品出口额增加,并且这一现象对于高价值重量比的产品更加明显。异质性分析表明虚假贸易行为更倾向于出现在加工贸易占比较高的行业。2012年汇率改革增大了人民币汇率的波动幅度,增加了企业跨境套利的成本,汇改之后企业的虚假贸易行为得到明显抑制。此外,远期汇率升值同时提高了虚假出口占总出口的比重。本文从一个新的视角研究了我国的虚假贸易问题,并对打击虚假贸易活动提出相关建议。     

商业银行监管资本套利的均衡分析

监管资本套利,产生于巴塞尔协议资本监管框架的缺陷,是一种利用资本监管制度之间的差异性以及制度内部的不协调性,运用某种手段在不改变实际风险水平的情况下提高资本充足率水平的行为。通过对以下问题的探讨:商业银行监管资本套利所获得的收益在银行与资金需求方之间的配置比例;针对某种资产的监管资本套利,对其他资产供求双方所产生的隐性套利收益的表现形式及其归属程度;由商业银行异质性所导致的监管套利顾客现象;信息不对称情况下,市场对于套利者与非套利者的逆向选择等等,认为银行监管部门应适当引导符合政策意图的套利行为,提高政策引导调控能力。     

An analysis of nonlinearities in term premiums and forward rates

Previous studies often assume a linear relation between term premiums on Treasury securities and forward interest rates even though a nonlinear relation is a theoretical and an empirical possibility. To examine the relation, this paper uses a nonparametric kernel approach that permits both linear and nonlinear associations. The linear specification yields conditional expectations of term premiums that are similar to those predicted by the kernel approach only at the mean forward premiums. Generally, kernel estimation shows that the responses of expected term premiums to changes in forward premiums are time-varying and are significantly different from the constant slope coefficients produced by linear estimations. The evidence also shows that forward premiums contain much more information content for predicting future term premiums that has been found with linear estimation procedures.     

基于上证50ETF期权的“定价核之谜”研究

基于上证50E T F和上证50E TF期权数据,本文经验研究了中国市场是否存在“定价核之谜”,并对“定价核之谜”与市场走势之间的关系进行了探讨。实证结果显示,中国市场存在“定价核之谜”,且“定价核之谜”与下期市场收益率呈显著负向关系、与下期市场振幅呈显著正向关系。本文首次给出了“定价核之谜”在中国金融市场存在的经验证据,并且证实了“定价核之谜”对下期市场走势具有一定的预测作用。     

资产透明度、监管套利与银行系统性风险

资产不透明的金融机构过度依赖批发性融资进行监管套利不利于系统性风险的防控。在此背景下,本文首先在经典银行道德风险模型的基础上引入关联性,从资产透明度和监管套利的视角分析银行系统性风险累积的内在机理。而后利用2007-2018年中国上市银行微观数据,构建资产透明度指标和系统性风险指标(SRISK、MES),对理论推论进行实证检验。主要结论有:(1)资产不透明、监管套利会提高银行的系统性风险。(2)监管套利弱化了资产透明度和资本监管机制对银行系统性风险承担的约束作用,资产透明度与资本监管机制在约束系统性风险承担中的协调作用不明显。(3)以大银行为主的债权银行受监管套利的影响相较于受资产透明度的影响更明显。在此基础上,我们对完善金融风险防范体系以及监管机制提出了若干建议。     

Arbitrage crashes and the speed of capital

The imminent failure of prime brokers during the 2008 financial crisis caused a sudden decrease in the leverage afforded hedge funds. This decrease resulted from the asymmetrical payoff to rehypothecation lenders—the ultimate financiers, through prime brokers, to hedge funds. Seemingly long-term debt capital became short-term capital creating a duration mismatch between left-hand side arbitrage opportunities and right-hand side liabilities. Consequently, arbitrageurs became unable to maintain similar prices of similar assets. Mispricing magnitudes, and the time required to correct them, reflect the role of arbitrageurs in maintaining accurate prices during normal times and offer an estimate of discounts at which assets transact during crises.     

NDF市场:挑战与应对——各国NDF市场比较与借鉴

以NDF为代表的境外人民币衍生品的发展与影响是目前中国外汇当局最关注的问题之一。本文分析了人民币NDF市场的运行现状及其与人民币即期市场、人民币境内远期市场之间的关系和变迁,在借鉴各国NDF经验的基础上,对NDF运行机制进行了探讨,并提出可采取的应对策略,指出发展在岸NDF是我国目前可行的选择。     

American Parisian options

In this article, we describe the various sorts of American Parisian options and propose valuation formulae. Although there is no closed-form valuation for these products in the non-perpetual case, we have been able to reformulate their price as a function of the exercise frontier. In the perpetual case, closed-form solutions or approximations are obtained by relying on excursion theory. We derive the Laplace transform of the first instant Brownian motion reaches a positive level or, without interruption, spends a given amount of time below zero. We perform a detailed comparison of perpetual standard, barrier and Parisian options.     

去产能政策与融资租赁

本文对去产能政策和融资租赁之间的因果关系和内在机理进行了深入研究。基于2007—2016年中国上市公司的融资租赁交易数据的实证分析发现,去产能政策推动了融资租赁规模的扩张,而融资租赁规模的扩张又反过来削弱了去产能政策的效果,但程度有限。进一步分析表明,去产能政策从需求和供给两方面推动了融资租赁的扩张:去产能政策限制了产能过剩企业从银行等主流融资渠道获得长期资金的能力,这一方面激发了这些企业对融资租赁等融资方式的需求,另一方面也增强了银行通过融资租赁进行监管套利的动机。在党的十九大提出的“经济高质量发展”的背景下,本文发现有助于制定更加科学有效、与金融体系相互协调的产业政策。     

Negative Libor rates in the swap market model

We apply Stroock and Varadhan’s support theorem to show that there is a positive probability that within the Swap Market Model the implied Libor rates become negative in finite time. Mataix-Pastor received support from the Instituto Credito Oficial (ICO), Spain, and Fundación Caja Madrid.     

The analysis and valuation of interest rate options

This paper provides a simple, alternative model for the valuation of European-style interest rate options. The assumption that drives the hedging argument in the model is that the forward prices of bonds follow an arbitrary two-state process. Later, this assumption is made more specific by postulating that the discount on a zero-coupon bond follows a multiplicative binomial process. In contrast to the Black-Scholes assumption applied to zero-coupon bonds, the limiting distribution of this process has the attractive features that the zero-bond price has a natural barrier at unity (thus precluding negative interest rates), and that the bond price is negatively skewed. The model is used to price interest rate options in general, and interest rate caps and floors in particular. The model is then generalized and applied to European-style options on bonds. A relationship is established between options on swaps and options on coupon bonds. The generalized model then provides a computationally simple formula, closely related to the Black-Scholes formula, for the valuation of European-style options on swaps.     

Valuation of American options in the presence of event risk

This paper studies the valuation of American options in the presence of external/non-hedgeable event risk. When the event occurs, the American option is terminated and a rebate is paid instead of the promised pay-off profile. Consequently, the presence of event risk influences the exercise strategy of the option holder. For the financial market in a diffusion setting, the probabilistic structure in terms of equivalent martingale measures is briefly analysed. Then, for a given equivalent martingale measure the optimal stopping problem of the American option is solved. As a main result, no-arbitrage bounds for American option values in the presence of event risk are derived, as well as hedging strategies corresponding to the no-arbitrage bounds.Received: May 2004, Mathematics Subject Classification: 90C47, 60H30, 60G40JEL Classification: G13, D52, D81The author thanks John Gould and Ross Maller for useful discussions. The author is also grateful to a referee for helpful comments. This research was partially supported by University of Western Australia Research Grant RA/1/485.