| Summary: | 碩士 === 國立高雄應用科技大學 === 商務經營研究所 === 95 === Vietnam is becoming the world investment a hot spot area, the foreign capital starts to swarm to Vietnam. In the long-range view, followed the local economy development, the Vietnamese stock market's potential is not being still small. Therefore, this research wants to inquire into the Vietnamese card market earnings announcement the information connotation explanation ability, causes the information which the earnings announced to have usefulness, when lets the investor facing the earnings announcement, makes the more advantageous investment decision-making. In view of the Vietnamese emerging market in, its stock market earnings announced contains the information content to conduct the research, whether exists accumulates the unusual reward. The real diagnosis result not anticipated earnings for the earnings announced does not have the information connotation. When not anticipated earnings for negative, can have the negative unusual reward. When year earnings announcement, not anticipated full for negative, has the negative unusual reward, therefore not the anticipated year earnings have the information connotation for the negative announcement. Finally, the unusual reward also has the different response phenomenon by the different sector analysis and the event time.
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