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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.
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 ...
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
In a press release from the U.S. Attorney’s Office for the Southern District of New York, Rafael Alvarez is said to have committed one of the largest ever tax frauds by a return preparer.
Negative abnormal returns (α): Below-average returns that cannot be explained by below-market risk Security characteristic line (SCL) is a regression line, [ 1 ] plotting performance of a particular security or portfolio against that of the market portfolio at every point in time.
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Michael Bolton and his family were in good spirits over the holidays, one year after his brain tumor diagnosis.. The Grammy-winning singer shared a photo of himself in a Santa hat on his Facebook ...