How to say "volatility" in Japanese

• ボラティリティ
  nounThe main loanword for volatility in finance, referring to how much a market or security price swings. This is the usual choice in investment and market commentary contexts.
• ボラ
  nounA short, casual abbreviation of ボラティリティ, covering the same financial sense. It fits trader slang and informal market talk, but is less appropriate in formal writing.
• 揮発性きはつせい
  no-adjectiveCovers the physical and chemical sense: the tendency of a liquid or substance to evaporate readily. Not the word for price swings; it belongs in chemistry and materials discussions.
  これらの溶剤ようざいは、揮発性きはつせいのため、使用しよう時じに蒸発じょうはつし大気たいきに放出ほうしゅつされている。↗

  These solvents, due to their volatility, evaporate into the atmosphere when used.
• 揮発度きはつど
  nounA technical term for volatility as the degree to which a substance evaporates, used in chemistry. Like 揮発性, it does not apply to financial or figurative volatility.
• 変動率へんどうりつ
  nounLiterally a rate of fluctuation, useful when volatility is meant as a quantified measure of how much something varies. It can also mean regulation in other contexts, so check the sense.

Use 「ボラティリティ」 or 「ボラ」 for financial-market volatility, 揮発性 or 揮発度 for the chemical sense of evaporating easily, and 変動率 for a measurable rate of fluctuation.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• ボラティリティvolatility (esp. of a financial market)
• ボラvolatility (esp. of a financial market)
• 揮発性きはつせいvolatility
• 揮発度きはつどvolatility
• 変動率へんどうりつvolatility
• 振幅しんぷく(degree of) instability
• 振れ幅ふれはば(degree of) instability