NO.PZ2020021601000012
问题如下：
Ivan Paulinic, an analyst at a large wealth management firm, meets with his supervisor to discuss adding financial institution equity securities to client portfolios.
Paulinic gathers data on three national banks that meet initial selection criteria but require further review.
Paulinic investigates R- bank’s risk management practices with respect to the use of credit derivatives to enhance earnings, following the 2008 financial crisis. Exhibit 4 displays R- bank’s exposure over the last decade to credit derivatives not classified as hedges.
Based only on Exhibit 4, R- bank’s use of credit derivatives since 2007 most likely:
选项：
A.increased posted collateral.
B.decreased the volatility of earnings from trading activities.
C.indicates consistent correlations among the relevant risks taken.
解释：
B is correct.
Exhibit 4 indicates that exposure to free- standing credit derivatives dramatically declined from a peak during the global financial crisis in 2008. If a derivatives contract is classified as freestanding, changes in its fair value are reported as income or expense in the income statement at each reporting period. The immediate recognition of a gain or loss in earnings, instead of reporting it in other comprehensive income, can lead to unexpected volatility of earnings and missed earnings targets. As a result, earnings volatility from the use of credit derivatives most likely decreased.
请问老师，从背景知识的角度，为什么从2007年以来derivative作为enhance earning的手段会用的越来越少了呢，所有银行都有这样的趋势吗？金融危机以后，发现投机risk太高吗？为了更稳健，用得少了？
