Norwegian Cruise Line Holdings stock tumbled Wednesday after the cruise operator missed earnings expectations in the first quarter and signaled softening demand. The cruise industry has been steadfast in its view that demand and bookings are remaining strong despite concerns that consumers are pulling back on travel spending.

U.S. stocks are drifting at the start of a week with many potential flashpoints for markets including earnings reports and economic data. The S&P 500 was up 0.3% in early trading Monday. The Dow Jones Industrial Average was up 207 points,

U.S. stocks are slipping ahead of a busy week with several potential flashpoints for financial markets. The S&P 500 fell 0.7% Monday, coming off a winning week in its whipsaw