AT&T stock jumped after the analyst moved it from your equal of a neutral to a buy ranking by using a cost focus on of $21 for every share. M? th?y ng??i ch?t nh?ng ch?a ch?t là ?i?m gì? Gi?i mã gi?c m? th?y ng??i ch?t nh?ng ch?a ch?t và nh?ng con s? could m?n W