Norwegian Cruise Line Holdings was the best-performing stock in the S&P 500 Monday after the Miami-based cruise operator raised its full-year guidance amid strong demand.CFO Mark Kempa said Norwegian has seen record bookings.Shares of Norwegian were up more than 8% in intraday trading. Norwegian Cruise Line Holdings (NCLH) was the best-performing stock in the S&P 500 Monday after the Miami-based cruise operator raised its full-year guidance amid strong demand.  Norwegian on Monday raised its 2024 adjusted e ...