Financial firm Needham & Co. has raised its price target for Apple stock from $450 to $540. In a new memo, Needham analyst Charlie Wolf writes that the firm has adjusted its valuations of Apple's different businesses. The iPad has seen a substantial rise in its estimated contribution to stock value, now calculated at 12.2 percent. "The increase in the iPadÃs value stemmed chiefly from our assumption that the device should capture a materially larger share of the tablet market than we previously forecast," according to Wolf.
