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.
1 Negative beta - A beta less than 0, which would indicate an inverse relation to the market - is possible but highly unlikely. However, some investors believe that gold and gold stocks should have negative betas because they tended to do better when the stock market declines.  Beta of 0 - Basically, cash has a beta of 0.