Nikko Asset Management's Roger Bridges says that the pound had been overbought as investors swung towards pricing in a Bremain outcome.
Sterling hit a 2016 high and the euro surged against the dollar and yen after a series of late opinion polls favored Britain staying.
CNBC's Wilfred Frost speaks with Ipsos MORI CEO Ben Page about the latest poll on the Brexit referendum.
Gabriela Santos, J.P. Morgan Funds; Richard Bernstein, Richard Bernstein Advisors, and Robert Hormats, Kissinger Associates, weigh in on how the Brexit vote could impact U.S. markets. I think by this time next week people won't even remember what Brexit was, says Bernstein.
CNBC's Sara Eisen reports there's a big focus on sterling and the currency markets as Brits head to the polls to vote on the Brexit referendum.
Vasileios Gkionakis, head of global FX strategy at Unicredit, says a vote to leave will be a blow to sterling, while one to remain will see it rally.
If the U.K. voted to exit the EU, currency traders would likely dump the pound and send funds into the dollar, FX pros said.
There will be a painful initial market reaction to a Brexit decision but markets will eventually settle down, says JPMorgan AM's Kerry Craig.
Capital Link Intl's Brett McGonegal says there's a wave of nationalist movements globally and people want to regain control.
Britain's tourism industry, while resilient, will be hit by post-Brexit uncertainty and currency moves, says Continuum Attractions' Juliana Delaney.
A close call for "Bremain" will be a wake-up call for David Cameron, but he will probably remain in charge, says Standard Chartered Bank's Sarah Hewin.
The dollar was broadly weaker on Wednesday as risk appetite returned to markets.
CNBC's Rick Santelli discusses the latest action in the bond market, and the U.S. dollar ahead of Thursday's Brexit vote.
Hans Olsen, Stifel, and Peter Boockvar, The Lindsey Group, weigh in on the potential fallout from Brexit. The undecided are going to decide this vote, says Olsen.
Mark Astley, Millennium Global CEO, discusses the risks a Brexit could pose for global markets.
Sterling and the euro rose on the last day before Britain's referendum on EU membership, the pound trading just off its highest this year.
With a Brexit, the U.K. might actually find itself giving up its policy autonomy, says Landfall Strategy Group's David Skilling.
Dennis Gartman, The Gartman Letter, weighs in on how he is positioning his portfolio ahead of Thursday's Brexit vote.
CNBC's Kate Kelly reports hedge fund managers are scrambling to be in the right position following the Brexit referendum.
CNBC's Wilfred Frost talks with former U.K. Foreign Secretary William Hague about the risks associated with Brexit and why he is pro 'remain.'