The Dow closed slightly up based on positive corporate news, but watered down by a lowered credit rating for Greece.  The Dow gained .01 percent to close at 11,952.97, while the Manufactured Housing Composite lost 3.02 percent to close at 957.10.  Housing stocks closed mixed, with several taking a drubbing.  MSCI gained .89 percent and ELS was up .45 percent. Meanwhile, Deer Valley fell 10.00 percent, Cavco dropped 3.24 percent, Skyline Corporation was down 2.53 percent and Sun Communities lost .14 percent.  Palm Harbor Homes was flat.