The purpose of this research study is to observe the result of investor sentiment towards corporate announcement. Researcher used descriptive research and investigative research design in this study. The methodology used for evaluating data is technical and statistical tools for analysis. Data's are real and are gathered from small investors and London stock exchange,FTSE 250 Index listed companies share prices. The investor behaviour during corporate announcement period was found to be varying during pre and post announcement but, actually in some cases, both security returns variability and...