Optimal Hedging with a Subjective View: An Empirical Bayesian Approach

The standard optimal hedging model has been the preferred theoretical model of normative hedging behavior. In empirical applications, the model is often implemented with the parameter certainty equivalent (PCE) procedure. However, the PCE procedure completely ignores parameter estimation risk and subjective views. We develop an "empirical" Bayesian optimal hedging model that not only effectively accommodates parameter estimation risk, but also provides hedgers with a theoretically intuitive yet quantitatively rigorous framework to blend their subjective views and a "marketwide" or "firmwide" consensus in determining optimal hedging positions (ratios).     

Hedging Multiple Price Uncertainty in International Grain Trade

Commodity and freight futures contracts are analyzed for their effectiveness in reducing uncertainty for international traders. A theoretical model is developed for a trader exposed to several types of risk. OLS hedge ratio estimation is compared to the SUR and the multivariate GARCH methodologies. Explicit modeling of the time-variation in hedge ratios via the multivariate GARCH methodology, using all derivatives, and taking into account dependencies between prices, results in reductions in risk, even after accounting for transaction costs. Results confirm that while the commodity futures contracts are important for hedging risk, freight futures are a useful mechanism for reducing risk.     

Hedging Opportunities for Canadian

The unprecedented commodity price volatility in the last decade has resulted in a growing interest in futures trading by farmers. One of the major reasons often provided for the usefulness of commodity futures markets is that they provide a mechanism whereby producers can shift the risk of price change onto others. Interestingly, little research has been conducted on the effectiveness of the WCE as a hedging tool for farmers.
The objective of this paper was to investigate the extent to which the futures contracts for rapeseed, barley and flaxseed can be used by farmers in order to reduce price risk (measured by volatility). Drawing on earlier literature, the theory of hedging was reviewed and formulae for estimating the optimal hedge and the effectiveness of hedging were presented. An empirical analysis determined that the Winnipeg rapeseed, barley and flaxseed futures contracts are very useful in terms of allowing a producer the opportunity to reduce exposure to price risk.     

Optimal Hedging Ratios for Wheat and Barley at the LIFFE: A GARCH Approach

Over 100,000 futures contracts for cereals are traded annually on the London International Financial Futures Exchange. The proportion of the spot position held as futures contracts ‐ the hedging ratio ‐ is critical to traders and traditional estimates, using OLS, are constant over time. In this paper, we estimate time‐varying hedging ratios for wheat and barley contracts using a multivariate generalised autoregressive conditional heteroscedasticity (GARCH) model. Results indicate that GARCH hedging ratios do change through time. Moreover, risk using the GARCH hedge is reduced significantly by around 4 per cent for wheat and 2 per cent for barley relative to the no hedge position, and significantly by around 0.2 per cent relative to the constant hedge. The optimal, expected utility‐maximising, and the risk‐minimising hedging ratios are equivalent.     

黑龙江省银行汇率避险产品发展现状及对策

汇改重启后,各类经济主体避险意识显著增强,对汇率避险产品的需求更为迫切。从黑龙江省外汇指定银行汇率避险产品发展现状谈起,以案例分析的形式,综合评估目前在用的避险产品特性,分析其对国际收支及跨境资金流动的影响,从国家监管、银行经营管理和企业层面剖析了黑龙江省银行汇率避险产品发展的制约因素,提出了相关政策建议,以更好地支持和加强银行汇率避险服务。     

The Simultaneous Hedging of Price Risk, Crop Yield Risk and Currency Risk

This study analyzes the joint hedging decision of a Canadian firm in U S. based price and yield futures. The key results of this study are that jointly hedging price and yield can reduce more revenue risk than hedging only with price futures. For offshore hedgers, the evidence shows that foreign exchange risk is important and can be reduced by jointly hedging in the currency futures markets.
Nous analysons les décisions de couverture multiple d'une entreprise canadienne contre les risques afférents aux prix et aux rendement à terme. Les conclusions clés de l'étude sont qu'une couverture simultanée contre ces deux risques peut accorder une meilleure protection qu'une couverture établie seulement contre les risques des prix à terme. Pour ceux qui font affaire avec un pays étranger, l'expérience montre que le risque afférent au taux de change est important et qu'il est possible de le réduire en se couvrant en měme temps contre les risques affectant la valeur à terme de l'argent.     

Hedging Strategies for Grain Processors

Price risk management confronting grain processors differs from that faced by conventional hedgers, especially when futures markets for outputs do not exist. Three components of this problem are addressed in this study. One is the relationship between input and output prices, which are impacted in part by the structure and conduct of an industry. In some cases, these are highly correlated and in others they are not. The second refers to the hedge horizon or how far forward a firm should cover its inherent and persistent short cash positions. This study incorporates these relationships into a utility maximizing model to evaluate hedging effectiveness relative to traditional hedging strategies for processors. Finally, stochastic dominance analysis is used to compare hedging strategies when output is sold at a fixed price for future delivery. Secondary data from the bread‐baking industry are used for empirical analysis. Results indicate that hedging decisions are impacted by these relationships and affect firm risk exposure. La gestion du risque de prix des conditionneurs de grain diffère de celle des opérateurs en couverture traditionnels, surtout lorsqu'il n'existe pas de marchés de contrats à terme pour les extrants. La présente étude traite de trois aspects du problème. Tout d'abord, il y a la relation entre le prix de l'intrant et le prix de l'extrant, prix qu'influencent en partie la structure et le comportement d'une industrie. Dans certains cas, la corrélation est très étroite et dans d'autres, elle ne l'est pas. Ensuite, il y a l'horizon de couverture ou jusqu'où dans le futur une entreprise devrait‐elle couvrir ses faibles positions de trésorerie inhérentes et soutenues. Dans la présente étude, nous avons intégré ces relations dans un modèle de maximisation de l'utilité pour évaluer l'efficacité des opérations de couverture par rapport aux stratégies de couverture traditionnelles des conditionneurs. Finalement, l'analyse de la dominance stochastique est utilisée pour comparer les stratégies de couverture lorsque l'extrant est vendu à un prix fixe pour livraison à terme. Des données secondaires issues de l'industrie de la boulangerie ont été utilisées pour l'analyse empirique. Les résultats ont indiqué que ces liens influaient sur les décisions de couverture et que ces décisions avaient des répercussions sur l'exposition au risque de l'entreprise.     

Developing Hedging Strategies for Québec Hog Producers under Revenue Insurance

The paper investigates the optimal hedging strategies of Québec hog producers when they participate in a publicly funded revenue insurance program known as ASRA (Régime d'assurance-stabilisation des revenus agricoles). A forecast model of local cash and futures prices is built and Monte Carlo methods are used to derive the optimal futures and option positions of Québec hog producers. The positive correlation between forecasts of futures and cash spot prices induces positive sales of futures and put options to hedge price risk. ASRA provides put options to hog producers at actuarially advantageous terms. Producers can increase the expected utility of profits by selling back a portion of these put options using financial markets. Options are attractive to manage price risk given the nonlinearity in the profit function induced by the revenue insurance scheme. Speculative incentives to use futures and options are also discussed in the context of ASRA.     

Can Futures and Options Markets Hold the Milk Price Safety Net? Policy Conflicts and Market Failures in Dairy Hedging

U.S. Department of Agriculture's Dairy Options Pilot Program promoted hedging by producers, and was a test case for similar programs in other agricultural industries. Rapidly shifting milk pricing policies impeded quantitative hedging evaluations while the program was active. Hedging appears capable of reducing price variance by 50–60% in most regions, and favors large, sophisticated producers in heavy cheese manufacturing regions. Forward contracting or price insurance products may offer lower transaction costs and attract more small-scale producers. Ballooning milk deficiency payments and milk's prominent role in trade-distorting payments suggest an ongoing need to promote private price risk management tools.     

Market-Based Price-Risk Management: Welfare Gains for Coffee Producers from Efficient Allocation of Resources

The volatility of coffee prices exposes coffee producers to price risk. Price risk is one of many risks faced by commodity producers in developing countries. Coffee is widely traded in the international commodity derivative markets. This offers scope for coffee producers to manage their price risk by hedging on these markets. The hedging mechanism recommended is based on the use of coffee futures and options. The mechanism involves costs, so the benefits of hedging need to be evaluated in order to assess its usefulness for producers. It emerges that the main benefit lies in producers being able to allocate resources more efficiently in the production of coffee. An analysis of theoretical and field evidence shows that this benefit can potentially be quite high, especially for risk-averse producers. This underlines the need to provide producers with access to suitable price-risk hedging mechanisms.     

More reasons why farmers have so little interest in futures markets

The use by farmers of futures contracts and other hedging instruments has been observed to be low in many situations, and this has sometimes seemed to be considered surprising or even mysterious. We propose that it is, in fact, readily understandable and consistent with rational decision making. Standard models of the decision about optimal hedging show that it is negatively related to basis risk, to quantity risk, and to transaction costs. Farmers who have less uncertainty about prices and those with a diversified portfolio of investments have lower optimal levels of hedging. If a farmer has optimistic price expectations relative to the futures market, the incentive to hedge can be greatly reduced. And finally, farmers who have low levels of risk aversion have little to gain from hedging in terms of risk reduction, in that the certainty‐equivalent payoff at their optimal hedge may be little different than the certainty equivalent under zero hedging. These reasons are additional to the argument of Simmons (2002) who showed that, if capital markets are efficient, farmers can manage their risk exposure through adjusting their leverage, obviating the need for hedging instruments.     

Potential demand for hedging by Australian wheat producers

The potential for hedging Australian wheat with the new Sydney Futures Exchange wheat contract is examined using a theoretical hedging model parametised from previous studies. The optimal hedging ratio for an ‘average’ wheat farmer was found to be zero under reasonable assumptions about transaction costs and based on previously published measures of risk aversion. The estimated optimal hedging ratios were found by simulation to be quite sensitive to assumptions about the degree of risk aversion. If farmers are significantly more risk averse than is currently believed, then there is likely to be an active interest in the new futures market.     

Alternative Hedging Strategies for an Alberta Feedlot Operator

This paper examines the feasibility of a Canadian producer using the U.S. futures markets to hedge specific products. “Multihedging” refers lo a situation where a producer uses several hedges to hedge both inputs and outputs and in doing so locks in a profit margin on his operation or minimizes his losses. In particular, the paper examines the feasibility of hedging two inputs (barley and feeder cattle) and one output (fat cattle). The Chicago Board of Trade corn contract is used to hedge barley; the Chicago Mercantile Exchange feeder cattle contract to hedge feeder cattle; and the Chicago Mercantile Exchange live cattle contract to hedge fat cattle. These hedges are evaluated in terms of the level of returns to the producer, the primary conclusion being that during the period from September, 1975, to January, 1978. an Alberta feedlot operator could have increased his income level by hedging, but in doing so. he would have incurred a greater degree of instability. Cette communication examine la faisabilité pour un producteur canadien d'utiliser le marchéà terme amèricain pour arbitrer desproduits spècifiques. Dans un “multiarbitrage,” un producteur se livre à plusieurs arbitrages sur les entrèes et les sorties; cefaisant, il obtient une marge bénéficiaire ou minimise ses pertes. Cette communication examine en particulier la faisabilité d'arbitrer deux entrèes (orge et betail destinè a la boucherie) et une sortie (bétail engraissè). On utilise le contrat de maïs du “Chicago Board of Trade” pour arbitrer I'orge, le contrat des animaux de boucherie du “Chicago Mercantile Exchange” pour arbitrer les animaux de boucherie, le contrat de bétes sur pied du “Chicago Mercantile Exchange” pour arbitrer le bétail engraissé. On évalue ces arbitrages en fonclion des revenus qu'ils rapportent auproducteur tels que mesuréspar la moyenne et enfonction des variations dans les revenus tels que mesurées par l‘écart.     

Time‐varying Hedge Ratios: A Principal‐agent Approach

We use the classic agency model to derive a time‐varying optimal hedge ratio for low‐frequency time‐series data: the type of data used by crop farmers when deciding about production and about their hedging strategy. Rooted in the classic agency framework, the proposed hedge ratio reflects the context of both the crop farmer's decision and the crop farmer's contractual relationships in the marketing channel. An empirical illustration of the Dutch ware potato sector and its futures market in Amsterdam over the period 1971–2003 reveals that the time‐varying optimal hedge ratio decreased from 0.34 in 1971 to 0.24 in 2003. The hedging effectiveness, according to this ratio, is 39%. These estimates conform better with farmers’ interest in using futures contracts for hedging purposes than the much higher estimates obtained when price risk minimisation is the only objective considered.     

商品林投资风险的类型、成因与对策分析

在综述国内外学者对商品林投资风险类型及其成因研究成果的基础上,从风险管理角度出发,分析了商品林投资中可能产生的风险类型,主要有自然风险、经济风险、技术风险、政策风险。深入探讨这4种风险形成的原因,并提出有针对性的风险管理对策,即运用多样化经营、产业化经营、合同管理、套期保值、森林保险、专用基金等手段和方法防范和化解商品林投资风险。     

Factors influencing hedging decision: evidence from Brazilian citrus growers

The purpose of this study was to analyse the hedging behaviour of 98 citrus growers from the State of Sao Paulo, Brazil. Marketing behaviour was modelled as a choice between spot market, short and long‐term forward contracts. A multinomial logistic regression model was used to evaluate the role of behavioural, personal and managerial variables in the choice. Results indicated that the factors which explain the use of forward contracts by citrus growers are the following: risk propensity; trade with juice processing companies; farming diversification; overconfidence in management; participation in pools; use of management tools; and technical assistance. The results can be useful for farmers, policymakers, government agencies, traders and extension agents.     

Why do farmers have so little interest in futures markets?

A farm financial model with leverage and investment in two farm enterprises is specified. The model is extended to incorporate futures hedging and the Separation Theorem is used to show that optimal hedging is zero. The assumption of a risk‐free asset is relaxed and, while this leads to a violation of the Separation Theorem, the result that optimal hedging is zero is maintained providing that futures markets are efficient. It is concluded that if capital markets are efficient then farmers will have little interest in futures markets except to speculate.     

BASIS RISK AND HEDGING STRATEGIES FOR AUSTRALIAN WHEAT EXPORTS

Basis risk can play a significant role in the determination of effective hedging strategies. In this paper a portfolio framework is developed to examine the effect of basis risk on hedging strategies for Australian wheat exports. Monthly data for the period 1977 to 1984 were used to implement the analytical framework. While the traditional definition of hedging implies a hedge ratio of unity, the results of this research show that the average ratio of optimal hedge to stockholding is well below unity. Evolving market conditions can also cause the optimal hedge ratio to vary substantially over time.     

Crop Insurance as a Strategy for Adapting to Climate Change

Financial insurance for extreme events can play an important role in hedging against the implications of climate change. This paper combines a comprehensive estimation strategy and a unique panel dataset to study the role of financial insurance in farmers' welfare under uncertainty. Data are drawn from a large Italian farm panel dataset. We find that (i) demand for insurance products is likely to increase in response to climatic conditions, and (ii) that the use of insurance reduces the extent of risk exposure. We also find that farms growing more crops are less likely to adopt the insurance scheme. This confirms what is found in the theoretical literature. Crop diversification can be a substitute for financial insurance in hedging against the impact of risk exposure on welfare.     

Can satellite‐based weather index insurance improve the hedging of yield risk of perennial non‐irrigated olive trees in Spain?*

Olive oil yields fluctuate strongly due to their dependence on sufficient precipitation. An interesting option to hedge the yield risk in olive cultivation could be satellite‐based weather index insurance. Therefore, we implement index insurance as a hedging alternative for non‐irrigated olive groves using MODerate‐resolution Imaging Spectroradiometer (MODIS) satellite data. For this purpose, we focus on the Spanish region of Andalusia, given its importance in olive production at the international level. We calculate three satellite indices: the Vegetation Condition Index (VCI), the Temperature Condition Index (TCI) and the Vegetation Health Index (VHI). Meteorological indices related to temperature and precipitation are used as benchmarks. Firstly, we estimate the periods that have the greatest influence on the critical vegetative phase of olives, which extends from March to September. Based on the indices, insurance contracts are designed using a copula approach, which is then employed to evaluate their hedging effectiveness. On average, the hedging effectiveness of VCI‐, VHI‐ and TCI‐based weather index insurance contracts amounts to 38 per cent, 38 per cent and 29 per cent, respectively. Moreover, VCI‐ and VHI‐based weather index insurance contracts outperform traditional weather index insurance contracts based on precipitation (by 29 per cent) and temperature (by 16 per cent) indices.