profit warning
noun /ˈprɒfɪt wɔːnɪŋ/
  /ˈprɑːfɪt wɔːrnɪŋ/
(British English also profits warning)
 (business)- a statement from a company informing the people who invest in it that profits will be lower than expected 
- The company issued a profit warning following disappointing sales in October and November.
 - Last month's shock profits warning sent the company's share price into freefall.