낙폭이 · 낙폭을
size of a fall, drop (in prices or values)
Example
오후 들어 환율의 낙폭이 조금 줄었습니다.
In the afternoon, the exchange rate's drop narrowed slightly.
Word parts
낙 fall+폭 width
Literally 'width of the fall' — a shorter, punchier form of 하락폭 used in market news.
Good to know
The first syllable shows the initial-sound rule: it is read 낙 at the start of a word but 락 inside 하락.