What types of procedures can be performed to evaluate what we are seeing relative to unrealized losses in the Level 1 securities?

Level 2 Histogram of Unrealized Gain/Loss Unrealized G/L % 300 Gain < 10% Gain > 10% 200 Loss 10% 100 Loss 10% The X-axis of the histograms shows percentages of unrealized gains and losses, and the Y-axis shows number of securities. The visualizations depict the unrealized gains and losses by Level 1 and Level 2 securities, respectively. Histograms of Unrealized Gain/Loss September 30, 20Y2 Level 1 Histogram of Unrealized Gain/Loss Unrealized GL % Gain - 10% Gain > 10% Loss- J0% Logaos 8888 Number of Securities Number of Securities -21.00. -17.00.. -15.00. -12.00.. -10.00.. -.00% %00'9- -29.00. -25.00. -21.00.. 17.00. 13.00.. %00 -2.00% %00'0 %00 %00 %00'9 %00'6 %00'S %00'L- %00'C %00'8 10.00% %00' %00'CL %00'7