The common stock of Glick Toys Inc. has a daily standard deviation of stock price returns of 75 basis points (0.75 percent). On a certain day, call it Day 0, Glick Toys announces the launch of a new product line. You have been asked to evaluate whether the announcement was well received by the market. You decide to take the skills you learned in Core Finance and Data Analysis and perform an event study. The expected return on the market portfolio is two basis points a day (0.02 percent). An abnormal return is considered statistically significant if it is larger than two standard deviations in absolute value.

Based on the stock price movement, what can you conclude about the announcement, and what does it suggest about market efficiency?

 

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Day relative to announcement -4 -3 -2 -1 0 1 2 3 Stock price 30 30.33 30.48 30.3 31.21 31.52 31.27 31.14 Day relative to announcement -4 -3 -2 -1 0 1 2 3 Stock price 30 30.33 30.48 30.3 31.21 31.52 31.27 31.14