Investors Didn’t Love Delta’s Outlook—And Several Airline Stocks Are Slipping

Here is how Ardelyx (ARDX) and Halozyme Therapeutics (HALO) have performed compared to their sector so far this year.

Airlines make billions of dollars in revenue each year from co-branded credit cards.

Here is how United Natural Foods (UNFI) and Universal Corp. (UVV) have performed compared to their sector so far this year.