Equity portfolio diversification with high frequency data

Rare Events Analysis for High-Frequency Equity Data

In this work we present a methodology to detect rare events which are defined as large price movement relative to the volume traded. We analyze the behavior of equity after the detection of these rare events. We provide methods to calibrate trading rules based on the detection of these events and we exemplify for a particular trading rule. We apply the methodology to tick data for thousands of ...

Portfolio Diversification in Europe

Have the euro and accompanying measures of financial integration had a discernable impact on the deree of diversification of European investors? This is an empirical question that this paper tries to answer by exploring four alternative avenues. First we focus on the final outcome: If European investors are indeed better diversified, their consumption should be increasingly correlated. Second w...

Entropic Data Envelopment Analysis: A Diversification Approach for Portfolio Optimization

Recently, different methods have been proposed for portfolio optimization and decision making on investment issues. This article aims to present a new method for portfolio formation based on Data Envelopment Analysis (DEA) and Entropy function. This new portfolio optimization method applies DEA in association with a model resulting from the insertion of the Entropy function directly into the op...

Illiquidity, Portfolio Constraints, and Diversification *

Portfolio Choice and Perceived Diversification†

The old adage about putting all of one’s eggs in one basket was thought wise long before the advent of modern portfolio theory and the important results of Markowitz (1959) and others. However, despite the anecdotal imperative to investors to diversify their portfolios, the empirical reality is that diversification rarely takes place as recommended by portfolio theory. In this paper, I demonstr...