volatility 復習
The Nikkei stock average plunged nearly 4 percent on Thursday, posting its biggest one-day loss since March.
Stock markets in other parts of Asia also tumbled, after Wall Street’s worst losses in eight months led to broader risk aversion, a rise in market volatility gauges and concerns over overvalued stock markets in an environment of rapidly rising dollar yields.
今回取り上げるのはvolatility /v`ɔlətíləṭi/ です。『ジーニアス英和辞典』によると「不安定; 気まぐれ;揮発性」とあります。Cambridge Dictionaryによると“the quality or state of being like to change suddenly, especially by becoming worth”と定義されていました。
語源は『オックスフォード新英英辞典』によると(“in the sense ‘creature that flies’, also, as a collective, ‘birds’)とあります。ラテン語のvolareが‘to fly’を指すことからきているようです。(Kiwi girl)
