If you would invest 40.00 in N/A on April 26, 2012 and sell it today you would earn a total of 0.00 from holding N/A or generate 0.0% return on investment over 30 days.
Diversification
Pay attention
Overlapping area represents amount of risk that can be diversified away by holding N/A and IberiaBank Corp. in the same portfolio (assuming nothing else is changed)