Shares of Carnival (CCL 0.37%) (CUK 0.10%) have more than doubled since bottoming out in 2022, but the stock has been volatile this year. It currently sits at around $23, down from its 52-week high of$28.72.While strong demand for cruises has fueled higher revenue for Carnival, Wall Street is focused on risks that could derail its momentum. Specifically, declining consumer confidence in recent months could lead to weaker demand for cruise vacations. There's also the risk of new taxes on cruise lines that c ...