The phrase "has been fluctuated" is correct and usable in written English.
The phrase is typically used to describe how something has experienced a fluctuation or change. For example, "The stock market has been fluctuated over the past few years."
At the end of last year, the company reported $64 million in cash and recently the market cap has been fluctuating between $55 million and $65 million.
"His health has been fluctuating since February but he continued to fight until the last day, defying doctors' expectations.
The market price, which is supposed to reflect true market conditions, has been fluctuating between $1.12 and $1.16 a gallon in the Northeast district over the last few months.
On Monday morning, the Indian stock market — which hit a three-year low last March and has been fluctuating wildly since — soared.
With federal intervention, the homicide rate dropped precipitously but began rising again around 2000 and has been fluctuating since Hurricane Katrina.
The Caspian has been fluctuating in size, and the Aral has been shrinking, primarily because its tributaries, the Amu Darya and the Syr Darya, have been tapped heavily for irrigation purposes.
While revealing he hopes to have Alexis Sanchez fit for the FA Cup third-round clash with Sunderland on January 9, the prognosis on Wilshere and Welbeck has been fluctuating for some time.
In reality, however, it's quite clear that the driving force has been fluctuating optimism about the prospects for recovery, and hence for an eventual rise in short-term rates.
Originally, the memorial's cost was estimated at $15 million, but the eventual price tag could range from $18 to $22 million because the cost of the marine-grade steel planned for the project has been fluctuating over the years, said Rick Cahill, chairman of the New Jersey 9/11 Memorial Foundation.
