Shares of Norwegian Cruise Line Holdings Ltd. NCLH, -13.53% dove 12.3% in morning trading Friday, and were the second-worst performer in the S&P 500 SPX, +0.72% , in the wake of rival cruise operator Carnival Corp.’s CCL, -18.94% disappointing fiscal third-quarter results. Carnival’s stock was the S&P 500’s worst performer, tumbling 17.9% toward a 30-year low, after the company reported a much wider-than-expected quarterly loss and extended its streak of revenue misses to 10 quarters. Meanwhile, Norwegian Cruise’s stock was only falling toward an 8-week low, and was still 56.5% above its post-pandemic closing low of $7.77 on March 18, 2020. Royal Caribbean Corp.’s stock RCL, -9.56% slumped 9.2% on Friday toward a six-week low, and was 77.4% above its March 18, 2020 closing low of $22.33.