I mean, you could sell for less than you purchased (say you put 20% down) and buy a new home with 5% or 10% down.. so you take a haircut and increase your mortg

I mean, you could sell for less than you purchased (say you put 20% down) and buy a new home with 5% or 10% down.. so you take a haircut and increase your mortgage. People may do this if they have to move for a job.