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In finance, an abnormal return is the difference between the actual return of a security and the expected return.Abnormal returns are sometimes triggered by "events." Events can include mergers, dividend announcements, company earning announcements, interest rate increases, lawsuits, etc. all of which can contribute to an abnormal return.
In finance, Jensen's alpha [1] (or Jensen's Performance Index, ex-post alpha) is used to determine the abnormal return of a security or portfolio of securities over the theoretical expected return. It is a version of the standard alpha based on a theoretical performance instead of a market index .
r it is return to stock i in period t r f is the risk free rate (i.e. the interest rate on treasury bills) r mt is the return to the market portfolio in period t is the stock's alpha, or abnormal return is the stock's beta, or responsiveness to the market return
Methodologically, event studies imply the following: Based on an estimation window prior to the analyzed event, the method estimates what the normal stock returns of the affected firm(s) should be at the day of the event and several days prior and after the event (i.e., during the event window).
YouTube Rewind 2018 is the single most disliked video on YouTube, receiving over 19 million dislikes since its upload on December 6, 2018. [1] This list of most-disliked YouTube videos contains the top 42 videos with the most dislikes of all time, as derived from the American video platform, YouTube's, charts. [2]
For firms that report good news in quarterly earnings, their abnormal security returns tend to drift upwards for at least 60 days following their earnings announcement. Similarly, firms that report bad news in earnings tend to have their abnormal security returns drift downwards for a similar period. This phenomenon is called post-announcement ...
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MacRumors has a corresponding YouTube channel hosted by video producer Dan Barbera that provides content related to the website's coverage, including noteworthy Apple rumors, new product launches, reviews, tutorials, and more. [16] As of August 2023, the MacRumors YouTube channel has over half a million subscribers and 152 million video views. [17]