回复@选股er: 感謝耐心解答。基本上明白了。同股同權。二者存在微小價差也正常，畢竟有匯率、持有成本等差別吧？總的來講，股價亦步亦趨，偏離不會大。但近期疫情嚴重，本次遊輪體驗很恐怖，擔心在中長期對企業經營產生影響。況且還是在全球經濟不景氣的大背景下，重資產公司恐怕會相對被動。//@选股er:回复@Aaronsmart:在官网（网页链接）看到这则解释：
Carnival Corporation and Carnival plc operate a dual listed company, whereby the businesses of Carnival Corporation and Carnival plc are combined and they function as a single economic entity through contractual agreements between separate legal entities. Shareholders of both Carnival Corporation and Carnival plc have the same economic and voting interest but their shares are listed on different stock exchanges and are not fungible. Carnival Corporation common stock is traded on the New York Stock Exchange under the symbol CCL. Carnival plc is traded on the London Stock Exchange under the symbol CCL and as an ADS on the New York Stock Exchange under the symbol CUK. Carnival is the only company in the world to be included in both the S&P 500 index in the US and the FTSE 100 index in the UK.