Can we calculate beta OF STOCK A with this information;
Weights- A=1/3; B=2/3
STDEV - A=.3; B=.5
CORRELATION OF STOCK A AND B= 0.7
The information you provided allows you to calculate the portfolio variance of stock A and B. Beta is a measure of market risk and can be calculated by using the CAPM or if you know the market variance and correlation of the stock with the market.