I’m reviewing 2013 CFAI’s PM section and there is a question whch asks about the duration of a payer swap strategy:
The answer says that the approximate fixed-rate duration of a bond is 75% of its maturity (with a 3 year matury = (3 x 0.75) = 2.25, while the floating duration is 1/2 it’s semi-snnual pay period (so 0.5 x 0.5 = 0.25). You net these and get +0.25 - 2.25 = -2.0 for the duration of the swap.
Is the 75% duration of the maturity for the fixed side in the 2015 curriculum? I haven’t seen this before, and the Schweser materials only give the duration explicitly in their examples.