标题： 外汇市场的网络结构分析 显示英文标题

标题： Analysis of a network structure of the foreign currency exchange market

摘要： 我们分析了被视为交互货币网络的世界外汇（FX）市场结构。 我们分析了一组包括63种货币的每日时间序列FX数据，其中包括黄金、白银和铂金。 我们将所有具有共同基础货币的汇率分组，并分别研究每个组。 通过应用过滤相关矩阵的方法，我们识别出密切相关的货币集群。 这些集群通常根据经济和地理因素形成。 我们也研究了不同网络表示（即不同的基础货币）下的加权最小生成树拓扑，并发现大多数表示中的网络具有等级式的无标度结构。 此外，我们分析了网络的时间演变，并检测到其结构并非随着时间稳定。 可以识别出一种中期趋势，它影响了美元节点，降低了其中心性。 我们的分析还显示欧元在世界货币市场中的作用正在增加。 显示英文摘要

摘要： We analyze structure of the world foreign currency exchange (FX) market viewed as a network of interacting currencies. We analyze daily time series of FX data for a set of 63 currencies, including gold, silver and platinum. We group together all the exchange rates with a common base currency and study each group separately. By applying the methods of filtered correlation matrix we identify clusters of closely related currencies. The clusters are formed typically according to the economical and geographical factors. We also study topology of weighted minimal spanning trees for different network representations (i.e., for different base currencies) and find that in a majority of representations the network has a hierarchical scale-free structure. In addition, we analyze the temporal evolution of the network and detect that its structure is not stable over time. A medium-term trend can be identified which affects the USD node by decreasing its centrality. Our analysis shows also an increasing role of euro in the world's currency market.