"unusual volatility" is correct and usable in written English.
You can use it to refer to a sudden or dramatic change or fluctuation, such as when the stock market experiences a large increase or decrease in activity in a short period of time. For example: "The stock market experienced unusual volatility this week, with prices rising and falling sharply throughout the day."
The reason is fire control — eucalyptus trees are "fire intensive," shedding a lot of debris and burning with unusual volatility.
Along with corporate scandals and painful losses, the summer on Wall Street has been one of unusual volatility.
MetLife had hedge fund losses of $25 million, after taxes, in its investment portfolio, which it attributed to the "unusual volatility in the equity and fixed income markets".
Perhaps, to add value to this, every chief executive should be required to post his or her golf scores, for unusual volatility could be a useful indicator of trouble at work.
Sudbin brought the first half to its close with Beethoven's Opus 111, a slightly unbalanced affair, its strengths and weaknesses to some extent dictated by the unusual volatility of his approach.
Given these challenges, concerns linger about whether trading can possibly be smooth on what may prove to be a very heavy day of buying and selling with unusual volatility.
"I suspect that rather than an unusual level of volatility, we're actually seeing the development of a new normal," Queensland's first female premier told the ABC's 7.30 program.
For the second year in a row, there were more shuttered hedge funds than new ones, investors having been turned off by a mixture of high fees and subpar returns, owing in part to a crowded field of funds executing similar strategies and also to an unusual absence of volatility in the markets.
The New Yorker, August 23 , 1999P. 196 Briefly noted book review of "The Nudist on the Late Shift" (Random House; $25) by Po Bronson... Rich in character and anecdote, the book conveys with unusual immediacy the volatility of an environment where billion-dollar ideas are a dime a dozen.
If the fund beats its benchmark without exhibiting unusual risk or excessive volatility, it scores higher in Forbes ETF Advisor's ranking system.
"While the sales level was disappointing in the quarter, such volatility is not unusual in the industry, and increasing spending outside the U.S. is expected to lead to future growth," said Janardan Menon, a telecommunications analyst at Liberum Capital in London.
