noun
averaging down; dollar-cost averaging
A finance term for buying more of an asset as its price falls to lower the average purchase cost. Often used in stock or forex trading contexts.
株価が下がったので、難平買いを検討している。
Since the stock price has fallen, I'm considering averaging down.
難平はリスクを伴う手法だ。
Averaging down is a strategy that involves risk.
Abbreviation of 難局平均 (なんきょくへいきん), literally 'averaging in a difficult situation.' The exact historical derivation is uncertain, but the term is well-established in Japanese investment jargon.