The Dow gained just over a point to close at 12,381.11 in anticipation of first quarter corporate returns, while most housing stocks declined.  Cavco lost 5.27 percent, Skyline Corp. was down 3.01 percent, and Nobility Homes lost .33 percent.  Deer Valley remained unchanged.  The Manufactured Housing Composite lost 4.04 percent to close at 1187.30.