Alcoa ( AA) reported a 62% jump in second-quarter earnings Monday amid higher metal prices and strong demand, though revenue fell short of Wall Street's expectations. The aluminum producer, whose profit report is frequently dubbed the "kickoff" to earnings season, posted net income of $744 million, or 85 cents a share, up from $460 million, or 52 cents a share, a year earlier. Earnings from continuing operations rose to $752 million, or 86 cents a share, from $496 million, or 56 cents a share, a year earlier. The results included about 4 cents a share in charges tied to its U.S. labor contracts and strike preparations. Analysts polled by Thomson First Call forecast earnings of 86 cents a share, though it's unclear if those charges are included in that figure. Alcoa's revenue rose to $7.96 billion from $6.69 billion a year earlier, but the top line fell slightly shy of Wall Street's forecast of $8.02 billion. The company said revenue growth was driven by higher prices and strong demand in the aerospace, building and construction, commercial-vehicle and can-sheet markets. Shares of the Dow component were trading down 94 cents, or 2.8%, to $32.40 in after-hours trading.