A proposal for an open-source financial risk model

This paper presents a policy proposal for building a new framework for gathering, measuring and disclosing financial risk information in the global economy. The paper examines the current state of the financial risk framework, notes its advantages and disadvantages and proposes a new construct that aims to address some of the shortcomings that are currently in place. The proposed open-source financial risk model separates the dual function that internal risk models perform within financial institutions, first to attempt to optimize the risk-return profile of mostly private economic rent-seeking entities, and second to maximize safety and soundness considerations for the public which is at risk of bearing the consequences of financial actors. The goals of a robust financial risk model are examined in order to determine the design of the proposed risk framework

A proposal for an open-source financial risk model

This paper presents a policy proposal for building a new framework for gathering, measuring and disclosing financial risk information in the global economy. The paper examines the current state of the financial risk framework, notes its advantages and disadvantages and proposes a new construct that aims to address some of the shortcomings that are currently in place. The proposed open-source financial risk model separates the dual function that internal risk models perform within financial institutions, first to attempt to optimize the risk-return profile of mostly private economic rent-seeking entities, and second to maximize safety and soundness considerations for the public which is at risk of bearing the consequences of financial actors. The goals of a robust financial risk model are examined in order to determine the design of the proposed risk framework

Amplitude death in a ring of nonidentical nonlinear oscillators with unidirectional coupling

We study the collective behaviors in a ring of coupled nonidentical nonlinear oscillators with unidirectional coupling, of which natural frequencies are distributed in a random way. We find the amplitude death phenomena in the case of unidirectional couplings and discuss the differences between the cases of bidirectional and unidirectional couplings. There are three main differences; there exists neither partial amplitude death nor local clustering behavior but oblique line structure which represents directional signal flow on the spatio-temporal patterns in the unidirectional coupling case. The unidirectional coupling has the advantage of easily obtaining global amplitude death in a ring of coupled oscillators with randomly distributed natural frequency. Finally, we explain the results using the eigenvalue analysis of Jacobian matrix at the origin and also discuss the transition of dynamical behavior coming from connection structure as coupling strength increases.Comment: 14 pages, 11 figure

Searching for MgII absorbers in and around galaxy clusters

To study environmental effects on the circumgalactic medium (CGM), we use the samples of redMaPPer galaxy clusters, background quasars and cluster galaxies from the SDSS. With ~82 000 quasar spectra, we detect 197 MgII absorbers in and around the clusters. The detection rate per quasar is 2.7$\pm$0.7 times higher inside the clusters than outside the clusters, indicating that MgII absorbers are relatively abundant in clusters. However, when considering the galaxy number density, the absorber-to-galaxy ratio is rather low inside the clusters. If we assume that MgII absorbers are mainly contributed by the CGM of massive star-forming galaxies, a typical halo size of cluster galaxies is smaller than that of field galaxies by 30$\pm$10 per cent. This finding supports that galaxy haloes can be truncated by interaction with the host cluster.Comment: 11 pages, 12 figures. To appear in MNRA