Londonrocks

Changing dollar duration using a controlling position has been stricken from the CFAI curriculum, it’s in the errata. So don’t even bother with it.
As for stuff Schweser says is likely or not likely.. it’s a guess on their part. They aim for the most points on the exam, not ALL of the points.
Seriously, if you blew the reverse cash & carry in 2008, guaranteed the 9 points there didn’t make or break you. Plus, practically everyone got it wrong so it was a toss out anyway.
If we calmly focus on the big picture, we should be fine..