"Someone say house party?" In a note of that title, BofA MBS strategists lift their target for national home price gains in 2013 to 8% from 4.7%. The group cites the positive feedback loop of price gains fueling expectations of more price gains and easier credit, in turn stimulating more buying. Also helping is low inventory - a function of low supply, as opposed to the bubble when it was feverish demand. XHB +1%.