How to Determine the Expected Return and standard Deviation Stock BW R P.(R)P)(R-R)2P) 15 10 -015 00576 03 20 006 00288 09 40 036 00000 21 20 042 00288 33 10 033 00576 Sum 1.00 090 07728 5-85-8 How to Determine the Expected Return and Standard Deviation Stock BW Ri Pi (Ri )(Pi ) (Ri - R ) 2 (Pi ) -.15 .10 -.015 .00576 -.03 .20 -.006 .00288 .09 .40 .036 .00000 .21 .20 .042 .00288 .33 .10 .033 .00576 Sum 1.00 .090 .01728