 Carnival Corp.s Holland America on Tuesday extended its halt on cruises through Dec. 15 as travel and port restrictions due to the pandemic continue. Cancelled cruises included trips to the Caribbean, Mexico, and Australia. The company had already cancelled its Alaska, Europe and CanadaNew England cruises for 2020 and some Hawaii itineraries through early 2021. Buyers will automatically receive credit for a future cruise or opt for a full refund by Sept. 15, the company said. Carnival shares have lost 68 this year, contrasting with gains around 4 for the SP 500 index. 