The phrase "a period of speculation" is correct and usable in written English.
It can be used to describe a timeframe during which people are guessing or theorizing about something, often in contexts like finance, science, or general discussions.
Example: "The stock market experienced a period of speculation before the major announcement was made."
Alternatives: "a phase of conjecture" or "an interval of uncertainty".
The winner of this year's Nobel peace prize is to be named on Friday morning, putting an end to a period of speculation and volatile betting.
Rhys McCarthy, national officer for the Unite union, said: "Today's news ends a period of speculation over United Biscuits and we trust will lead to a future of certainty for the workforce that makes some of the nation's favourite biscuits.
The British unit is arriving during a period of speculation that American-led forces are gearing up to strike remnants of Taliban and Al Qaeda forces near or across Afghanistan's mountainous border with Pakistan.
Guardiola's departure brings down the curtain on a remarkable run for the club — Barcelona has won 13 trophies during his tenure — and signals the start of a period of speculation about where he will end up.
These measures gradually resulted in an overvalued exchange rate, causing severe balance of payments difficulties, which, after a period of speculation against the currency, usually led to devaluation.
When the diamond market crashed in the early 1980's after a period of reckless speculation, the company spiraled toward bankruptcy.
CAIRO — President Hosni Mubarak arrived back in Egypt on Saturday, three weeks after undergoing an operation in Germany, ending a period of intense speculation over the state of his health but maybe not about the future of his country's leadership.
The New York Times recently reminded us about what a bubble means: "A bubble, in the economic sense, is basically a period of excessive speculation in something, whether it is tulips, tech companies or houses".
The report, published in May, said consultation began after a period of "intense speculation and controversy about the future of the area and the town centre as a whole" and it said "the atmosphere at the start was one of mistrust and cynicism".
The announcement followed a period of numerous speculations and rumors regarding the possibility of the band touring in 2015.
The decision to confirm his starting side a week early, thus avoiding a lengthy period of speculation over Warburton's participation as well as giving the side that won in Paris more training time together, certainly appeared to pay off.
