nosedive

nose +‎ dive

nosedive (plural nosedives)

1. A headfirst fall or jump.
2. (economics) A rapid fall in price or value.

nosedive (third-person singular simple present nosedives, present participle nosediving, simple past and past participle nosedived)

1. (intransitive, of aircraft) To dive down in a steep angle.
2. (intransitive, economy) To perform a rapid fall in price or value.

• crash dive
• power dive