Lululemon Athletica (LULU) shares are down sharply in afternoon trading Friday after a Credit Suisse analyst said he was "somewhat concerned" about demand for new products. The yoga and athletic apparel maker's shares fell 8% to 68.88 after Christian Buss said the retailer is offering more discounts on weaker-than-expected demand for its new casual apparel lines. Still, Credit Suisse is keeping its $84 price target on the stock and it noted modest