问题如下图：请问如何得知是short position？
选项：
A. 
B. 
C. 
D. 
解释：
NO.PZ2016071602000002 问题如下 The T pension plreports a projectebenefit obligation of $17.4 billion. If the scount rate creases 0.5%, this liability will increase $0.8 billion. Baseon this information, the liabilities behave like A.Short position in the stomarket B.Short position in cash C.Short position in a bonwith maturity of about nine years Short position in a bonwith ration of about nine years is correct. We ccompute the mofieration of the liabilities = —(ΔP/P)/Δy = —(0.8/17.4)/0.0005 = 9.2 years. So, the liabilities behave like a short position in a bonwith a ration arounnine years. Answers anare incorrebecause the liabilities have fixefuture payoffs, whi not resemble cash flow patterns on equities or cash. Answer is incorrebecause the ration of a bonwith a nine-yematurity is less thnine years. For example, the ration of a 6% coupon pbonwith nine-yematurity is seven years only. 如题
请问PBO怎么看成short position in a bon scout rate crease ,bonvalue increase,P增加，PBO不是和bon向变化，不是long position 么？
