问题如下图：
收益率曲线变陡，不是应该减小长期债券的头寸吗，Portfolio1里面30年期头寸明显是最小的，为什么不对呀。还是说我要把30年和10年的头寸加起来看？
选项：
A. 
B. 
C. 
解释：
NO.PZ201812020100000806 老师这道题是针对利率曲线steepen的情况，按说这种情况不是应该使用bullet吗？可为什么经过计算以后bullet的portfolio 1 还不如portfolio2呢
NO.PZ201812020100000806 这道题的思考逻辑能不能麻烦老师写一下
NO.PZ201812020100000806 Lastly, Earton reviews a separate account for Cefrino’s US clients thinvest in Australigovernment bon. He expects a stable Australiyielcurve over the next 12 months. 这不是说的是stable吗？
NO.PZ201812020100000806 Pro Forma Portfolio 1 Pro Forma Portfolio 2 C is correct. Given Earton’s expectation for a steepening yielcurve, the best strategy is to shorten the portfolio ration more heavily weighting shorter maturities. Pro Forma Portfolio 2 shows greater partiration in the 1- an3-yematurities relative to the current portfolio anthe least combineexposure in the 10- an30-yematurities of the three portfolios. The prectechange is calculatefollows: Prectechange = Portfolio pamount × partiPV× (curve shift in bps)/100老师您好，拿到这个题应该从哪里入手，考的哪个考点，谢谢🙏
NO.PZ201812020100000806 partiPVBP是什么
