A. Saeedi; F. Rahnama Roodposhti; F. Bikzadeh Abbasi
Volume 8, Issue 31 , October 2010, , Pages 121-141
Abstract
Two techniques which are used in stock markets and most investigators and market analysts used are contrarian and momentum investing strategies. These strategies help investors to predict future performance based on past performance. Momentum investing strategy move the same way as the market ...
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Two techniques which are used in stock markets and most investigators and market analysts used are contrarian and momentum investing strategies. These strategies help investors to predict future performance based on past performance. Momentum investing strategy move the same way as the market stock move. In contrast, contrarian investing strategy acts vice versa.
In this paper, for the period of 2005- 2007 different formation periods (1 to 6 month) and holding periods (1 to 36 month) are examined. The results show each strategy is profitable in a specific formation periods and holding periods. For formation periods from 1 to 4 month, momentum strategy is profitable and for formation periods from 5 and 6 month, contrarian strategy creates profitable portfolios.
The best momentum effect is seen in formation periods of 4 month and holding periods of 36 month. Also, the best contrarian effect is seen in formation periods of 5 month and holding periods of 35 month.
Mohhammad Reza Nikbakht; Mehdi Moradi
Volume 3, Issue 9 , April 2005, , Pages 1-26
Abstract
One of the assumptions of efficient market is that investors react to new information. The evidence show that investors overreact to new information. They tend to be either over-optimistic or over-pessimistic. Therefore equity prices are not equitably determined by the "true" forces of market supply/demand ...
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One of the assumptions of efficient market is that investors react to new information. The evidence show that investors overreact to new information. They tend to be either over-optimistic or over-pessimistic. Therefore equity prices are not equitably determined by the "true" forces of market supply/demand and are not in equilibrium most of the time. Although stock prices would go abnormally high (low) due to investors' Overreaction in the initial period, they have a tendency to adjust themselves back to the equilibrium level in the subsequent period.
This research investigates the Investors' overreaction in the Tehran Stock Exchange. The results indicate that stocks in the best (worst) performing experience, a reversal of fortune in the following years.
