1. Goldman Sachs downgraded NCLH from Buy to Neutral, target lowered to $21. 2. NCLH stock is down 27% this year, trailing competitors. 3. Norwegian cut fourth-quarter net yield outlook growth to 3.5%-4%. 4. Oversupply concerns in the Caribbean market present risks for NCLH. 5. Rival Viking Holdings upgraded, highlighting better performance despite market weakness.