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Author: Silvia Rigamonti Publisher: ISBN: Category : Languages : en Pages : 23
Book Description
We study the price and volume effects on a stock following a change in the composition of the Italian Stock Exchange indexes, i.e. an inclusion in or an exclusion from the Mib30, that ranks the top 30 stocks by capitalization and liquidity, and the Midex, that includes the subsequent 25 stocks. We observe a different reaction of the MIB30 stocks prior to and after the Midex creation. Prior to the Midex creation, stocks included into the Mib30 experience an abnormal return of 7% that reverses to normal levels in the following 3 weeks; deletions exhibit a significant excess return of -4.8% over the event window preceding the change, which is not offset in the following weeks. With the creation of the Midex, stocks included in the Mib30 show a persistent negative abnormal return, while excluded stocks exhibit a temporary price pressure. On the contrary, stocks included into the Midex experience a significant abnormal return of 11%, while deleted stocks exhibit an abnormal return of -6.6% (significant at 10% level). Both effects seem to persist. We exclude that the information hypothesis may explain our evidence, since revisions are based on public information; results seem consistent with the price pressure hypothesis and with the existence of a liquidity premium, that changes once a stock is included in (or excluded from) the indexes on which a future contract is actively traded.
Author: Silvia Rigamonti Publisher: ISBN: Category : Languages : en Pages : 23
Book Description
We study the price and volume effects on a stock following a change in the composition of the Italian Stock Exchange indexes, i.e. an inclusion in or an exclusion from the Mib30, that ranks the top 30 stocks by capitalization and liquidity, and the Midex, that includes the subsequent 25 stocks. We observe a different reaction of the MIB30 stocks prior to and after the Midex creation. Prior to the Midex creation, stocks included into the Mib30 experience an abnormal return of 7% that reverses to normal levels in the following 3 weeks; deletions exhibit a significant excess return of -4.8% over the event window preceding the change, which is not offset in the following weeks. With the creation of the Midex, stocks included in the Mib30 show a persistent negative abnormal return, while excluded stocks exhibit a temporary price pressure. On the contrary, stocks included into the Midex experience a significant abnormal return of 11%, while deleted stocks exhibit an abnormal return of -6.6% (significant at 10% level). Both effects seem to persist. We exclude that the information hypothesis may explain our evidence, since revisions are based on public information; results seem consistent with the price pressure hypothesis and with the existence of a liquidity premium, that changes once a stock is included in (or excluded from) the indexes on which a future contract is actively traded.
Author: Pierluigi Bologna Publisher: ISBN: Category : Languages : en Pages :
Book Description
The impact of futures trading on the underlying asset volatility, and its characteristics, is still debated both in the economic literature and among practitioners. The aim of this study is to analyse the effect of the introduction of stock index futures on the volatility of the Italian Stock Exchange. This study mainly addresses two issues: first, the study analyses whether the reduction of stock market volatility showed in the post-futures period, already pointed out in previous research, is effectively due to the introduction of futures contract. Second, whether the 'futures effect', if confirmed, is immediate or delayed with respect to the moment of the futures trading onset is tested. The results show that the introduction of stock index futures per se has led to diminished stock market volatility and no other contingent cause seems to have systematically reduced it. Further, they also suggest that the impact of futures onset on the underlying market volatility is likely to be immediate. These findings are consistent with those theories stating that active and developed futures markets enhance the efficiency of the corresponding spot markets.
Author: Gary Robinson Publisher: ISBN: Category : Languages : en Pages :
Book Description
The stock market crash of October 1987 and the growing importance of index arbitrage and portfolio insurance helped to focus the attention of academics, practitioners and regulators on the possibly destabilising role of equity index futures on the underlying cash market. Although theoretical evidence on this question is somewhat ambiguous, empirical evidence, relating particularly to US markets, has been less equivocal: typically, no significant effect of futures trading has been found. This paper presents an analysis of daily stock price volatility on the London Stock Exchange for the period 1980-93. The measure of volatility produced is appropriate, given the distribution of returns and the time-varying nature of stock price volatility, and changes in monetary policy regime. The impact of futures on stock price volatility is measured within an augmented ARCH framework and the principal result is striking: rather than increasing volatility, index futures contracts are found to have reduced volatility significantly by around 17%.
Author: Silvia Rigamonti
Author: Silvia Rigamonti
Author: Pierluigi Bologna
Author: Pierluigi Bologna
Author: Al MacGartland
Author: Gary Robinson
Author: B. Thomas Byrne
Author: Huseyin Gulen
Author: Frank J. Fabozzi
Author: Kalok Chan
Author: Rudra Prakash Pradhan