MBS terminology

When interest rates continue to fall, mortgage prepayment speeds don’t necessarily increase because people have already refinanced. This phenomonon is referred to as…what?

I can’t remember if this is a L1 or L2 term.

Some kind of prepayment fatigue, it was in L2.

prepayment burnout.

Fools rush in.

This. Or refinancing burnout. Same thing.