The quantitative study of financial markets is more and more widespread due to their growing importance in the economy and everyday life. Financial markets can be viewed as real-world complex dynamical systems which are continually evolving, have significant practical importance and produce an enormous amount of data recording the aggregate action of many participants. In recent years, the quan...

The complex behavior of financial markets emerges from decisions made by many traders. Here, we exploit a large corpus of daily print issues of the Financial Times from 2(nd) January 2007 until 31(st) December 2012 to quantify the relationship between decisions taken in financial markets and developments in financial news. We find a positive correlation between the daily number of mentions of a...

This paper studies Pareto-optimal risk-sharing arrangements in a private information economy with aggregate uncertainty and ex ante heterogeneous agents. I show how to implement Pareto optima as equilibria when agents can trade claims to consumption contingent on aggregate shocks in financial markets. The first result is that if aggregate and idiosyncratic shocks are independent, the implementa...

This paper examines the relationship of financial liberalization and stock markets integration among ASEAN-5 (Note 1) stock markets: Indonesia, Malaysia, the Philippines, Singapore and Thailand. Three sample periods are covered based on the progress of financial liberalization. By using Johansen and Juselius multivariate cointegration procedures, Granger-causality tests and variances decomposit...

Do women and men behave differently in financial asset markets? Our results from an asset market experiment show a marked gender difference in producing speculative price bubbles. Mixed markets show intermediate values, and a meta-analysis of 35 markets from different studies confirms the inverse relationship between the magnitude of price bubbles and the frequency of female traders in the mark...

In this paper we make use of the uncovered interest rate parity (UIRP) relationship to examine the extent that the liberalization of emerging financial markets has resulted in the integration of developing countries’ currency markets into the international capital market. Previous tests of the impact of liberalization on the integration of emerging markets capital markets into world financial m...

This paper argues that the introduction of a short-sale constraint in the ArrowRadner framework invalidates standard definitions of complete and incomplete markets. In this constrained set-up, two threshold values with familiar properties arise. The case of a zero short-sale bound set on some security fulfills the standard definition of “incomplete” financial markets. Beyond a particular level ...

We investigate whether fractal markets hypothesis and its focus on liquidity and investment horizons give reasonable predictions about dynamics of the financial markets during the turbulences such as the Global Financial Crisis of late 2000s. Compared to the mainstream efficient markets hypothesis, fractal markets hypothesis considers financial markets as complex systems consisting of many hete...

We present a model of flight to quality episodes that emphasizes financial system risk and the Knightian uncertainty surrounding these episodes. In the model, agents are uncertain about the probability distribution of shocks in markets different from theirs, treating such uncertainty as Knightian. Aversion to this uncertainty generates demand for safe financial claims. It also leads agents to r...