a. Jensen's Alpha or Jensen's Measure. 1  In finance, Jensen's alpha (or Jensen's Performance Index) is used to determine the excess return of a stock, other security, or portfolio over the security's required rate of return as determined by the Capital Asset Pricing Model.t is a common measure of assessing an active manager's performance as it is the return in excess of a benchmark index or risk-free investment. The difference between the fair and actually expected rates of return on a stock is called the stock's alpha.
Guide. A magnetic resonance angiogram (MRA) is a type of magnetic resonance imaging (MRI) scan that uses a magnetic field and pulses of radio wave energy to provide pictures of blood vessels inside the body.
When blood vessels become blocked, narrowed, or otherwise damaged, they can lead to problems like chest pain, a heart attack, or a stroke. An MRA allows your doctor to find exactly which blood vessels are injured and to view the extent of the damage. Your doctor may schedule an MRA if you have had any of the following: a stroke