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Author: Suleyman Basak
Publisher:
ISBN:
Category : Financial futures
Languages : en
Pages : 0
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Book Description
Despite much work on hedging in incomplete markets, the literature still lacks tractable dynamic hedges in plausible environments. In this article, we provide a simple solution to this problem in a general incomplete-market economy in which a hedger, guided by the traditional minimum-variance criterion, aims at reducing the risk of a non-tradable asset or a contingent claim. We derive fully analytical optimal hedges and demonstrate that they can easily be computed in various stochastic environments. Our dynamic hedges preserve the simple structure of complete-market perfect hedges and are in terms of generalized "Greeks," familiar in risk management applications, as well as retaining the intuitive features of their static counterparts. We obtain our time-consistent hedges by dynamic programming, while the extant literature characterizes either static or myopic hedges, or dynamic ones that minimize the variance criterion at an initial date and from which the hedger may deviate unless she can pre-commit to follow them. We apply our results to the discrete hedging problem of derivatives when trading occurs infrequently. We determine the corresponding optimal hedge and replicating portfolio value, and show that they have structure similar to their complete-market counterparts and reduce to generalized Black-Scholes expressions when specialized to the Black-Scholes setting. We also generalize our results to richer settings to study dynamic hedging with Poisson jumps, stochastic correlation and portfolio management with benchmarking.
Author: Suleyman Basak
Publisher:
ISBN:
Category : Financial futures
Languages : en
Pages : 0
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Book Description
Despite much work on hedging in incomplete markets, the literature still lacks tractable dynamic hedges in plausible environments. In this article, we provide a simple solution to this problem in a general incomplete-market economy in which a hedger, guided by the traditional minimum-variance criterion, aims at reducing the risk of a non-tradable asset or a contingent claim. We derive fully analytical optimal hedges and demonstrate that they can easily be computed in various stochastic environments. Our dynamic hedges preserve the simple structure of complete-market perfect hedges and are in terms of generalized "Greeks," familiar in risk management applications, as well as retaining the intuitive features of their static counterparts. We obtain our time-consistent hedges by dynamic programming, while the extant literature characterizes either static or myopic hedges, or dynamic ones that minimize the variance criterion at an initial date and from which the hedger may deviate unless she can pre-commit to follow them. We apply our results to the discrete hedging problem of derivatives when trading occurs infrequently. We determine the corresponding optimal hedge and replicating portfolio value, and show that they have structure similar to their complete-market counterparts and reduce to generalized Black-Scholes expressions when specialized to the Black-Scholes setting. We also generalize our results to richer settings to study dynamic hedging with Poisson jumps, stochastic correlation and portfolio management with benchmarking.
Author: Sally Shen
Publisher:
ISBN:
Category :
Languages : en
Pages : 31
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Book Description
We develop a robust optimal dynamic hedging strategy that takes both downside risks and market incompleteness into account for an agent who fears model misspecification. The robust agent is assumed to minimize the shortfall between the assets and liabilities under an endogenous worst case scenario by means of solving a min-max robust optimization problem. When the funding ratio is low, robustness reduces the demand for risky assets. However, cherishing the hope of covering the liabilities, a substantial risk exposure is still optimal. A longer investment horizon or a higher funding ratio weakens the investor's fear of model misspecification. If the expected equity return is overestimated, the initial capital requirement for hedging can be decreased by following the robust strategy.
Author: Dimitris Bertsimas
Publisher:
ISBN:
Category : Arbitrage
Languages : en
Pages : 80
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Book Description
Author: Abraham Lioui
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
This paper derives optimal hedging demands for futures contracts from an investor who cannot freely trade his portfolio of primitive assets in the context of either a CARA or a logarithmic utility function. Existing futures contracts are not numerous enough to complete the market. In addition, in the case of CARA, the nonnegativity constraint on wealth is binding and the optimal hedging demands are not identical to those that would be derived if the constraint were ignored. Fictitiously completing the market, we can characterize the optimal hedging demands for futures contracts. Closed-form solutions exist in the logarithmic case, but not in the CARA case, since then a put (insurance) written on his wealth is implicitly bought by the investor. Although solutions are formally similar to those which obtain under complete markets, incompleteness leads in fact to second best optima.
Author: PeiLin Billy Hsieh
Publisher:
ISBN:
Category :
Languages : en
Pages : 45
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Book Description
We investigate the effects of return jumps on option bid-ask spreads measured in implied volatility. To explain bid-ask spread quoting behavior, we construct a general model with market makers trading in an incomplete market in which a Bernoulli-type jump could occur. Following a numerical analysis of equilibrium, we apply a nonparametric method to identify the jump components and then test the validity of our theoretical findings. Our results strongly suggest that, at a low jump arrival rate, the dynamic hedging of diffusion movement outperforms static hedging which considers both diffusion and jump risks together, and market makers should apply a dynamic hedging strategy most of the time. A testable implication of quoting behavior, which assumes market makers apply dynamic hedging, is ratified in our empirical work. Additionally, our regression shows that bid-ask volatility spread increases by 0.742% for a one-standard-deviation increase in our defined nonlinear jump factor and by 0.247% for the factor of diffusion volatility. We obtain a R2 value above 80%, and the jump risk factor is characterized by t-statistics above 7, whereas diffusion volatility is only marginally significant. Thus, this paper theoretically explains why and how the jump risk affects options' bid-ask spread and empirically shows that the jump risk influences options' liquidity both statistically and economically.
Author: Dimitris Bertsimas
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Given a European derivative security with an arbitrary payoff function and a corresponding set of" underlying securities on which the derivative security is based, we solve the dynamic replication problem: find a" self-financing dynamic portfolio strategy involving only the underlying securities that most closely" approximates the payoff function at maturity. By applying stochastic dynamic programming to the minimization of a" mean-squared-error loss function under Markov state-dynamics, we derive recursive expressions for the optimal-replication strategy that are readily implemented in practice. The approximation error or " " of the optimal-replication strategy is also given recursively and may be used to quantify the "degree" of market incompleteness. " To investigate the practical significance of these -arbitrage strategies examples including path-dependent options and options on assets with stochastic volatility and jumps. "
Author: Abraham Lioui
Publisher: Springer Science & Business Media
ISBN: 038724106X
Category : Business & Economics
Languages : en
Pages : 268
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Book Description
This book is an advanced text on the theory of forward and futures markets which aims at providing readers with a comprehensive knowledge of how prices are established and evolve in time, what optimal strategies one can expect the participants to follow, whether they pertain to arbitrage, speculation or hedging, what characterizes such markets and what major theoretical and practical differences distinguish futures from forward contracts. It should be of interest to students (MBAs majoring in finance with quantitative skills and PhDs in finance and financial economics), academics (both theoreticians and empiricists), practitioners, and regulators. Standard textbooks dealing with forward and futures markets generally focus on the description of the contracts, institutional details, and the effective (as opposed to theoretically optimal) use of these instruments by practitioners. The theoretical analysis is often reduced to the (undoubtedly important) cash-and-carry relationship and the computation of the simple, static, minimum variance hedge ratio. This book proposes an alternative approach of these markets from the perspective of dynamic asset allocation and asset pricing theory within an inter-temporal framework that is in line with what has been done many years ago for options markets.
Author: Dimitris Bertsimas
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Given a European derivative security with an arbitrary payoff function and a corresponding set of" underlying securities on which the derivative security is based, we solve the dynamic replication problem: find a" self-financing dynamic portfolio strategy involving only the underlying securities that most closely" approximates the payoff function at maturity. By applying stochastic dynamic programming to the minimization of a" mean-squared-error loss function under Markov state-dynamics, we derive recursive expressions for the optimal-replication strategy that are readily implemented in practice. The approximation error or " " of the optimal-replication strategy is also given recursively and may be used to quantify the "degree" of market incompleteness." To investigate the practical significance of these -arbitrage strategies examples including path-dependent options and options on assets with stochastic volatility and jumps."
Author: Nassim Nicholas Taleb
Publisher: John Wiley & Sons
ISBN: 9780471152804
Category : Business & Economics
Languages : en
Pages : 536
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Book Description
Destined to become a market classic, Dynamic Hedging is the only practical reference in exotic options hedgingand arbitrage for professional traders and money managers Watch the professionals. From central banks to brokerages to multinationals, institutional investors are flocking to a new generation of exotic and complex options contracts and derivatives. But the promise of ever larger profits also creates the potential for catastrophic trading losses. Now more than ever, the key to trading derivatives lies in implementing preventive risk management techniques that plan for and avoid these appalling downturns. Unlike other books that offer risk management for corporate treasurers, Dynamic Hedging targets the real-world needs of professional traders and money managers. Written by a leading options trader and derivatives risk advisor to global banks and exchanges, this book provides a practical, real-world methodology for monitoring and managing all the risks associated with portfolio management. Nassim Nicholas Taleb is the founder of Empirica Capital LLC, a hedge fund operator, and a fellow at the Courant Institute of Mathematical Sciences of New York University. He has held a variety of senior derivative trading positions in New York and London and worked as an independent floor trader in Chicago. Dr. Taleb was inducted in February 2001 in the Derivatives Strategy Hall of Fame. He received an MBA from the Wharton School and a Ph.D. from University Paris-Dauphine.
Author: Vera Minina
Publisher:
ISBN: 9789036526111
Category :
Languages : en
Pages : 110
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Book Description
