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arXiv 1707.05096q-fin.MFq-fin.TR
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薄风险分担市场中的有效风险规避

Effective risk aversion in thin risk-sharing markets

Michail Anthropelos, Constantinos Kardaras, Georgios Vichos

摘要:

我们考虑薄不完全金融市场,其中具有异质偏好和风险敞口的交易者有动机根据他们提交的需求计划进行战略性行为,从而影响价格和配置。我们认为,交易者相对更多地暴露于市场风险倾向于提交更具弹性的需求函数。非竞争性均衡价格和分配是交易者之间博弈的结果。给出了这种均衡存在唯一性的一般充分条件,并对两个交易者的交易进行了广泛的分析。即使战略行为导致低效的社会分配,交易商有足够高的风险承受能力和/或大的初始暴露于市场风险在非竞争性均衡中获得更多的效用收益,相比竞争性的。

英文摘要:

We consider thin incomplete financial markets, where traders with heterogeneous preferences and risk exposures have motive to behave strategically regarding the demand schedules they submit, thereby impacting prices and allocations. We argue that traders relatively more exposed to market risk tend to submit more elastic demand functions. Noncompetitive equilibrium prices and allocations result as an outcome of a game among traders. General sufficient conditions for existence and uniqueness of such equilibrium are provided, with an extensive analysis of two-trader transactions. Even though strategic behaviour causes inefficient social allocations, traders with sufficiently high risk tolerance and/or large initial exposure to market risk obtain more utility gain in the noncompetitive equilibrium, when compared to the competitive one.

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