标题： 自旋模型作为宏观金融市场模型的微观基础 显示英文标题

标题： Spin models as microfoundation of macroscopic financial market models

摘要： 宏观价格演化模型常用于投资策略。 在定义用于同一目的的微观代理模型方面，已经取得初步的成果。 微观模型比纯粹现象学的宏观模型更能深入理解市场机制，因此为市场调控提供了更好的模型机会。 我们在一个案例研究中说明了这一策略，从一个与伊辛模型密切相关的微观自旋市场模型推导出宏观朗之万方程。 微观和宏观视角的相互作用也促进了对微观模型的更好理解，并可能指导基于代理的市场模型的构建，作为宏观价格模型的基础。 显示英文摘要

摘要： Macroscopic price evolution models are commonly used for investment strategies. There are first promising achievements in defining microscopic agent based models for the same purpose. Microscopic models allow a deeper understanding of mechanisms in the market than the purely phenomenological macroscopic models, and thus bear the chance for better models for market regulation. We exemplify this strategy in a case study, deducing a macroscopic Langevin equation from a microscopic spin market model closely related to the Ising model. The interplay of the microscopic and the macroscopic view allows for a better understanding of the microscopic model, as well, and may guide the construction of agent based market models as basis of macroscopic price models.