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 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 ...

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 ...

volatile warns the optimizer that a variable can change without notice, so we need to know why that would ever matter. And for that, we’ll take a quick glimpse into the logic of (one type of) compiler ...

Most days, the stock market doesn’t see big moves higher or lower. Generally, indexes like the S&P 500 gain or lose less than 1% a day. But from time to time, the market experiences significant price ...