JPMorgan analyst Michael Gambardella reduced his estimates for Alcoa to reflect lower earnings estimates for the company's Aluminum segment. However, Gambardella expects Alcoa's earnings to "take a step up" in the second half of 2019 and believes its efforts to improve operational performance and optimize its portfolio should continue to drive value this year and next. He lowered his price target for the shares to $52 from $60 but keeps an Overweight rating on the name. Gambardella does not see much further downside in alumina or aluminum prices, which he says creates an attractive risk/reward for Alcoa shares.