As the moguls of business assemble this morning on the moguls of Davos there is no sign that stocks are about to slide downhill any time soon. (With the possible exception of Alpine Global Dynamic Dividend Fund (AGD) whose 12.93% tumble propped up all NYSE issues.) The Dow (^DJI) rose for an eighth time in nine sessions and again the “Rihanna portfolio” outperformed.   Last week in a nod to her Diamonds  Harry Winston (HWD) surged. Yesterday paying homage to the singer’s Umbrella Travelers (TRV) — whose symbol is the same — gained 2.06% to an historic high despite getting caught in the Superstorm Sandy deluge. ...