"stir speculation" is a correct and usable phrase in written English.
It means to cause people to wonder or make guesses about something. Example: The celebrity's sudden appearance with a new ring on her finger stirred speculation about a possible engagement.
Absent sources stir speculation.
ERIC DASH ON THE GOOGLE SEARCH Nothing like the sighting of Google's mysterious — and mysteriously large — jet to stir speculation.
Not without reason, the older Miliband appears to have concluded that, even now, such a comeback would stir speculation about the rivalry between the two brothers, undermining Labour's chances at the next election.
Ms. Palin is scheduled to arrive in Iowa on Tuesday to attend the premiere of a documentary on her life, "The Undefeated," a rare appearance here that is sure to stir speculation about her political intentions.
It also stirred speculation that Credit Suisse might use the 5.5percentt share it holds in another insurer, Swiss Life, as partial payment.
Inevitably the high-profile success stirred speculation that Mr. Abutalibov might be destined for higher office, perhaps prime minister.
Observations of the flight of birds and projectiles stirred speculation among the ancients as to the forces involved and the manner of their interaction.
Ms. Tymoshenko had stirred speculation that she might do so by remaining largely out of the public eye in recent days.
The announcement's timing has stirred speculation here that the court might invalidate the first round of the elections and require a revote.
His address, and the reception accorded it, stirred speculation that Dr. Carson, who is black, could be a palatable alternative for conservatives in the 2016 presidential election.
That stirred speculation that he might be trying to send a covert signal to the sniper, acknowledging his power as a means of encouraging further communication.
