I was just reading the “Home Resort Rules & Regulations” document on the DVC website, and was shocked to see a direct answer to this question! & I was even more shocked that it is specifically allowed!!
Copied & pasted directly from the rules & regs-
5.b.
Borrowing Home Resort Vacation Points. A Club Member may Borrow under the following rules:
1) Club Members may Borrow up to one hundred percent (100%) of their allotted Home Resort Vacation Points from their next succeeding Use Year to secure a reservation in the immediately preceding Use Year.
2) Once Borrowed, Home Resort Vacation Points cannot be returned to their original Use Year and will expire if not used by the end of the Use Year into which they were Borrowed.
However, if a Club Member purchases an additional Ownership Interest after Borrowing Home Resort Vacation Points, that Club Member may substitute newly allocated Home Resort Vacation Points of a current Use Year for the Borrowed Home Resort Vacation Points that were used toward a future reservation, and the Borrowed Home Resort Vacation Points will be returned to their original Use Year.
5.e.
No Retrieval of Banked or Borrowed Home Resort Vacation Points. Once Home Resort Vacation Points have been Banked or Borrowed, they may not be returned to their original Use Year
except as noted in section 5.b.2) of this Article.
One lingering question remains. Must the new points be the same “home” (not just same membership/UY) as the borrowed points? I wonder this because it only speaks of the exception when speaking of HRV Points & it never specifically mentions DVC Points. Or since it doesn’t specifically preclude DVC points in general, can it be assumed that any new purchase will qualify (so long as it’s within the same membership/UY)?
6.b.
Club Members with Ownership Interests at Multiple DVC Resorts.
2) If a Club Member requests a Home Resort reservation during the Home Resort Priority Period and the reservation requires more Home Resort Vacation Points than the Club Member has available in that particular Home Resort,
he or she may Borrow Home Resort Vacation Points from that particular Home Resort’s next Use Year, subject to all Borrowing rules. Or, at the end of that particular DVC Resort’s Home Priority Period,
Club Members may use their Home Resort Vacation Points from other DVC Resorts as DVC Vacation Points to complete the reservation.
3) Club Members cannot apply Home Resort Vacation Points from one DVC Resort as DVC Vacation Points to any other DVC Resort during the destination DVC Resort’s Home Priority Period.