On the basis of the results of this study and available information regarding the expected rate of spontaneous resolution, 30% verteporfin dose seems to be safe and effective in the treatment of acute central serous chorioretinopathy.
This study has two objectives: to examine the relationship between managerial sentiment and corporate investment and to examine the relationship between investment and firm value. We use a sample of Taiwanese firms and find that an optimal level of investment that maximizes a firm's value does exist and that it depends upon the quality of the investment opportunities. In addition, the empirical results show that when firms have valuable (nonvaluable) investment opportunities, managerial optimism (pessimism) makes overinvestment (underinvestment) more likely. Interestingly, the overinvestment (underinvestment) phenomenon for optimistic (pessimistic) managers differs significantly between valuable project and nonvaluable project firms.
This paper investigates whether and how futures market sentiment and stock market returns heterogeneously affect the trading activities of institutional investors in the spot market in Taiwan. Our empirical results suggest that foreign investors are net sellers whenever futures market sentiment is bullish and net buyers when investor sentiment is bearish. The two types of domestic institutional investors have poor sentiment timing abilities and the price-pressure effect may account for the behavioral differences among institutional investors. In addition, all three institutional investors are momentum traders. Nevertheless, the momentum trading of foreigners is consistent with an information-based model and that of two local institutional investors, as behavior-based models suggest. This indicates that the same trading momentum strategy can lead to different outcomes for different investors, and both information-and behavior-based momentum trading can exist contemporaneously in the Taiwanese stock market.
KEY WORDS: institutional investors, investor sentiment, quantile regression.Jin-Shuei Luo (
By using the relationship between high sentiment and momentum, the main purpose of this paper is to investigate if psychological biases of investors have an influence on behavioral biases. We find that in the China stock market, high sentiment of loser groups is correlated with contributors of momentum profits, while high sentiment of winner groups is correlated with contributors of contrarian returns. Further analysis indicates that, the higher the investor psychological bias is, the greater the momentum return will become. Winners/losers that are most sensitive to sentiment and having the longest duration of being kept under the situation will result in higher returns.
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