The phrase "a complex and volatile" is correct and usable in written English.
It can be used to describe a situation, environment, or subject that is intricate and subject to rapid change or instability.
Example: "The market is currently a complex and volatile landscape, making it difficult for investors to make informed decisions."
Alternatives: "a complicated and unstable" or "an intricate and unpredictable".
It was no surprise that Mr. Keenlyside gave such a complex and volatile portrayal.
But there's a simpler alternative to cap and trade, which is a complex (and volatile) system.
Venezuela has a complex and volatile economy, with rampant corruption and high rates of unemployment and oil-fuelled inflation.
Barzani calls Kirkuk the Kurdish Jerusalem, but the city today is a complex and volatile mix of Arabs and Turkmens (ethnic Turks), as well as Kurds.
This decoupling, along with weak land tenure security due to a complex and volatile policy landscape, suppresses local incentives for grassland conservation.
China's statistics office said on Wednesday that stabilizing prices remained the top priority, even though a "complex and volatile" global economy posed a threat to growth, complicating the policy choices.
Various features, such as demand paging, parallel computing and multithreading, make the architecture of an OS very complex and volatile.
In this complex and volatile business context, everyone -- a Fortune 100 CEO with a long tenure, a newly minted serial entrepreneur, as well as each and every corporate employee -- needs to become a "corporate creative".
The world, in her view, is now so complex and volatile that it has become, essentially, a series of "perpetual dilemmas that you have to navigate".
Lise Grande, the U.N.'s humanitarian coordinator for Iraq, said the aid operation, which she called one of the most complex and volatile in the world, was hanging by a thread.
Two-component system (TCS) is an important signal transduction mechanism employed by prokaryotes to survive the complex and volatile environments [ 60], and has been involved in various stress responses in cyanobacteria [ 61, 62].
