No, if it was like my situation, we wanted to borrow for a trip earlier in the year that we knew was 'for sure'. Then we had a second trip later that was a 'perhaps', and on we might cancel. Would have preferred the borrowed points for the 'for sure' trip and regular points for the trip that was 50-50. That way, if we cancelled the second trip, the points would return to the dashboard, and could be banked until next year. Borrowing, of course, would not allow for that. Not sure if that's how OP was thinking or not - but it is an interesting question as to why they don't allow it.