After completing the risk return profile for 60 stocks, a efficient frontier was plotted which can be seen below. How do I decribe results of my data linking it back to CAPM, what the results mean? Why its shaped that way in 300 words or less.

GA GB GC GD GE GF GH GI GJ GK GL 0.1 0.05 0.5 o 15 2.5 3.5 4.5 0.05 -0.1 0.15 Sum: 45.4561 1527 ?|? ? ! + 78% Average, 1420503602 Count 32