Recognising the principle that realised losses can at times systematically exceed
expected levels, the LGD assigned to a defaulted asset should reflect the possibility that the
bank would have to recognise additional, unexpected losses during the recovery period.
翻译过来就是:
考虑到存在实际损失有时系统性地超过预期(损失)水平的情况,给违约资产指定的损失率应当反映银行在经济复苏时期应当认定的实际损失可能比(预期损失)更多的损失,即非预期损失。
从新资本协议信用风险监管模型上看,预期损失是EL=PD*LGD,而非预期损失UL=VAR-EL,一般在经济从低谷向上走的复苏期UL也就是文中所指的 additional, unexpected losses是大于0的。