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.” ...

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 ...

Stock market volatility refers to the frequency and size of a market move in either direction over a specified time period. Higher volatility is usually a sign of increased risk, but it can also ...

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.” ...