@vincentt both formulas are in fixed income reading only. Both are in the same LOS.
in exhibit 2, had the duration of futures contract been given, we can calculate it. In this case since it is not given we can use the cheapest to deliver bond where all details are given
50. Given Bixby’s new target duration and the data in Exhibits 1 and 2, the most appropriate action using Treasury futures is to sell:
A. 646 contracts.
B. 789 contracts.
C. 811 contracts.