Shares of Carnival Corporation (CCL) plunged 6.96% in Thursday's pre-market trading session, despite receiving a mixed bag of signals from Wall Street analysts. The cruise line operator's stock took a hit as investors grappled with conflicting messages about the company's future prospects.

Morgan Stanley, a prominent financial services firm, raised its rating on Carnival to Equal Weight from Underweight, suggesting a more neutral stance on the company's outlook. However, in a move that appeared to contradict this upgrade, the same analysts simultaneously cut their price target for Carnival to $21 from $25. This reduction in the price target indicates lowered expectations for the stock's potential upside, which seems to have overshadowed the improved rating in investors' minds.

The contradictory nature of these analyst actions appears to have fueled investor uncertainty, contributing to the significant pre-market drop. Market participants seem to be focusing more on the lowered price target rather than the improved rating, reflecting growing concerns about Carnival's near-term growth prospects in the highly competitive cruise industry landscape. As the market opens, it remains to be seen how Carnival's stock will perform throughout the trading day and whether the company can assuage investor concerns about its future performance.