The company is taking full advantage of a hot, seemingly long-tail trend. The past few days have been quite a smooth cruise for Carnival (CCL 0.59%) (CUK 1.00%) stock. Powered by solid quarterly results, investors and pundits alike have become notably more bullish on the storied cruise line operator's potential. One of the latter group, in fact, thinks the shares have upside approaching 40%. A bull gets more bullish Just after those results were published, Macquarie analyst Paul Golding added $1 to his Carn ...