– This is the script of CNBC's news report for China's CCTV on May 5, Thursday.
Welcome to CNBC Business Daily, I'm Qian Chen.
Forget the debate between the "leave" and "remain" camps: It's the timing of the 'Brexit' referendum that worries some Fed watchers.
British voters are set to decide on June 23 whether or not to leave the European Union, just one week after the Federal Reserve's June 14-15 policy meeting. Some economists say that for a Fed that has become increasingly attuned to global and financial developments, the uncertainty around the U.K. vote will force the Federal Open Market Committee to remain on hold.
Two polls in the last 24 hours now have the euroskeptic "Leave EU" campaign ahead.
A weekly online poll published Tuesday by opinion poll firm ICM, shows 45 percent of voters were in favor of Brexit, against 44 percent who believe Britain should remain in the 28-member bloc.
Sterling today posted its single biggest one-day fall against the U.S. dollar in six weeks after investors digested the data.
The boost in the polls given by the visit to the U.K. by President Barack Obama for those campaigning for Britain to remain in Europe already appears to have worn thin among the British public.
"With the Brexit referendum just eight days [after] the meeting, the bar for the domestic data is pretty high," wrote Pantheon Macroeconomics' chief economist, Ian Shepherdson, in a note. "We think the decision will be closer than markets believe, but ultimately we think Dr. Yellen will prefer to wait until after the vote, and move in September."
The U.K. may not be the only one mulling its future in the European Union (EU). In fact, the fierce debates and headline-grabbing warnings surrounding the Brexit vote in June have given hope to euroskeptics around Europe.
Denmark, the Czech Republic and Poland could face their own referendums on EU membership if the U.K. votes to leave, experts believe.
Speaking to CNBC Wednesday, Andreas Dombret, Executive Board Member at the Bundesbank highlighted the impact of the U.K. leaving Europe on markets.
"Brexit would be the single most financial event we would see this year. I would hope the U.K. would stay as part of the EU," he said.
CNBC's Qian Chen, reporting from Singapore.