But in a strong economy, falling rates can also lead to higher inflation, a recession and a run on the dollar.
First, lower rates have led local governments to issue bonds at a record rate.
Unstable rates can lead to drastic changes in population levels.
Lower rates led to a general increase in trade so that a larger and faster vessel was required.
The new rates led to a sharp increase in some bills - never a popular occurrence.
It isn't necessarily a linear response, so a faster rate in this case can lead to a higher temperature increase.
Stock prices rose on the belief that lower rates would lead to better business conditions.
This year, the low rates led the church to refinance, a step that brought a significant saving.
Increasing rates of childhood obesity have lead to higher than average blood pressure levels in children.
A more likely danger is that the higher rates will lead many young, healthy residents to drop insurance.