What is beta? Why beta?  Well it is the volatility of the stock or portfolio to the market as a whole.  This conversation can get really deep really quick if we start discussing various financial models and the actual calculation of it using regression analysis.  If you would like to know more drop me a line and we can discuss more in depth. What can it really tell us about a stock or portfolio?  Well when you look at a stock that has a beta that has a beta of 1.0, this stock would typically move with the market.  What...