Previous studies have used the stock market approach to find the aggregate number of (firms with) foreign exchange exposures in a given country, region, or industry. Methodologies have differed in many aspects but two of the most basic differences relate to observation frequency and the choice...

In a static exchange economy, when all the endowments are issued as securities on a stock exchange, Pareto optimal allocations may be reached by trading options on the market index (see Breeden and Litzenberger (1978)). We extend this result when some of the risks cannot be exchanged on the...

The authors use a variance ratio test to test the weak form of market efficiency as regards capital markets in the Czech Republic, Slovakia, Hungary, Poland, and in the United States. Market efficiency was tested using weekly and monthly values of relevant market indices in a period from 1993...

In Turkey, in recent years, capital market is constantly continued to develop in the Turkish stock exchange, representing the market index has reached very high levels. Market index, it changes in all the sectors of the same sensitivity reaction. The purpose of this study, Borsa İstanbul...

Since its introduction fifteen years ago, minimal spanning tree has become an indispensible tool in econophysics. It is to filter the important economic information contained in a complex system of financial markets’ commodities. Here we show that, in general, that tool is not optimal in terms...

Index value is mainly reflected by stock prices related to companies listed in the market, as stock market index fluctuate in accordance to the change of stocks` prices pertaining to the index. Index is affected by domestic economic events as well as international effect. This study is an...