Under the modeled scenario, a drop of 0.25 percentage points left borrowers $2,424 underwater after three years. A drop of 0.5 points resulted in break-even status after 3.08 years. A decline of 75 basis points allowed borrowers to break even in just under three years, while a drop of 100 basis points delivered break-even status in 20 months and $4,764 in net savings.