Green bowel movements are very common and usually no cause for concern. People generally expect their stools to be a consistent brownish color, but it doesnât take much to cause that to change. Any change in stool color can be very alarming, but the cause is almost always benign.
Alpha is a measure of the active return on an investment, the performance of that investment compared to a suitable market index. An alpha of 1% means the investment's return on investment over a selected period of time was 1% better than the market during that same period, an alpha of -1 means the investment underperformed the market. Alpha is one of the five key measures in modern portfolio theory: alpha, beta, standard deviation, R-squared and the Sharpe ratio.
Bi or beta, is the measure of a specific stock's market risk and shows that stock's volitility relative to the market. Beta is not always constant; it changes sometimes. The most common calculation for beta is to run a regression of the security's past returns against the past returns of the market (above formula).The most current and up-to-date beta would most likely be found in the newspaper in the business section where all the stocks are listed.It would probably be listed with the other stats, like P/E (price earnings). If not found there, try the finance section of Yahoo for a specific company.nswers. Best Answer: The formula looks like this: Ri = Rrf + Bi(Rm-Rrf) Can be read as: R sub i equals R sub rf plus beta (Bi) times R sub m minus R sub rf where R sub i is the required return, R sub rf is return on a risk-free investment, R sub m is the return on the entire market and (Rm-Rrf) is the risk premium.