ValuJet stock lost more than a third of its value Tuesday, the first day of an indefinite shutdown executed under pressure from federal safety regulators.

ValuJet still intends to resume service within a month, President Lewis Jordan said Tuesday. But it will return with only 10 to 15 jets and six to eight flights a day. It had 320 daily flights and 51 jets before the crash.

ValuJet's troubles are hurting suppliers, too. McDonnell Douglas fell 1 3/8 to $47 1/4 on concerns about ValuJet's order for up to 100 of the company's new MD-95 jets for delivery starting in 1999. ValuJet is the first and so far only airline to order MD-95s.