* US stocks down ahead of earnings, profits seen limp * Dollar falls vs yen after sharp, rapid rise * Euro zone data points to stabilization of weak economy * Brent oil edges higher; gold also rises By Ryan Vlastelica and Herbert Lash NEW YORK, Jan 8 (Reuters) - Global shares fell and bond prices rose on Tuesday, with investors cautious ahead of a U.S. earnings season expected to show sluggish growth in quarterly corporate profits. The dollar and euro plunged against t