Carnival Corporation's stock has plummeted by over 14% after Morgan Stanley slashed its price target from $13 to $7 per share, warning of potential heavy losses. As of Wednesday morning, shares were down 15%, prompting other analysts, including Stifel Nicolaus, to drastically revise earnings estimates. Despite a slight recovery of 2.6%, concerns persist regarding the company's financial stability, with predictions suggesting the stock could even plunge to zero in the worst-case scenario.