0C was the number given to that temperature specifically because that's where drastic changes occur in water. With most materials, there is no significant diffe

0C was the number given to that temperature specifically because that's where drastic changes occur in water. With most materials, there is no significant difference between 0C, -1C, and 1C. On the other hand, 0% has no known special relationship with the housing market, so there's not really a good reason to expect substantially different behavior at that value compared to -.125% or +.125%.