Optimal investment in a large population of competitive and heterogeneous agents
Optimal investment in a large population of competitive and heterogeneous agents
复制标题
对大量具有竞争性和异质性的代理的最佳投资
DOI:
10.1007/s00780-023-00527-9
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发表时间:
2022
影响因子:
1.7
通讯作者:
Xuchen Zhou
中科院分区:
文献类型:
--
作者:
Ludovic Tangpi;Xuchen Zhou
This paper studies a stochastic utility maximisation game under relative performance concerns in finite- and infinite-agent settings, where a continuum of agents interact through a graphon (see definition below). We consider an incomplete market model in which agents have CARA utilities, and we obtain characterisations of Nash equilibria in both the finite-agent and graphon paradigms. Under modest assumptions on the denseness of the interaction graph among the agents, we establish convergence results for the Nash equilibria and optimal utilities of the finite-player problem to the infinite-player problem. This result is achieved as an application of a general backward propagation of chaos type result for systems of interacting forward–backward stochastic differential equations, where the interaction is heterogeneous and through the control processes, and the generator is of quadratic growth. In addition, characterising the solution of the graphon game gives rise to a novel form of infinite-dimensional forward–backward stochastic differential equation of McKean–Vlasov type, for which we provide well-posedness results. An interesting consequence of our result is the computation of the competition indifference capital, i.e., the capital making an investor indifferent between whether or not to compete.
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影响因子:
1.7
作者:
Lacker, Daniel;Soret, Agathe
通讯作者:
Soret, Agathe
DOI:
10.1137/22m1469328
发表时间:
2020-04
期刊:
SIAM J. Math. Anal.
影响因子:
--
作者:
M. Laurière;Ludovic Tangpi
通讯作者:
M. Laurière;Ludovic Tangpi
影响因子:
1.4
作者:
Bayraktar, Erhan;Wu, Ruoyu
通讯作者:
Wu, Ruoyu
影响因子:
1.8
作者:
Bayraktar, Erhan;Wu, Ruoyu;Zhang, Xin
通讯作者:
Zhang, Xin