Thanks for Glenn Hess’s article “U.S. Seeks Tighter Rail Safety Rules” (C&EN, Aug. 18, page 22). However, the word “volatile” is misused when he writes that “ethanol is less volatile than crude oil.” ...

The United States Environmental Protection Agency (“EPA”) published a November 28th Federal Register Notice that revises the regulatory definition of volatile organic compounds (“VOCs”) under the ...

Historical volatility gauges the risk of securities through price dispersion. Understand its calculation and practical ...

Volatility is a statistical measure of the amount an asset’s price changes during a given period of time. It has become a popular way of assessing how risky an asset is – the higher the level of ...

Look at a chart of the Standard & Poor’s 500 index today: It’s like a mountain range in Mordor — jagged movements, all up and down. Today, the Dow Jones industrial average fell more than 560 points at ...

Volatility is a measure of risk that is the statistical quantification of a security's possible investment returns. In short, it means large swings in price over a short period of time. Volatility in ...