Dollar falls due to the uncertainty before the vote in Britain

On Wednesday, the dollar showed a decline against its major rivals as investors remain cautious after the publication of recent polls showing that the fight for votes is still going on in a day before the vote in the UK.
GBP/USD rose by 0.20% to 1.4684, keeping the Monday's six-month high at 1.4782.
An opinion poll showed that the campaign for the preservation of the UK's membership in the European Union has lost some support before the referendum on Thursday.
The latest survey, held by Survation showed that 45% of UK citizens prefer to stay in the EU, 44% choose go out, and 11% were undecided.
In the previous survey showed 45% of EU supporters against 42% of opponents.
Two opinion polls published on Monday, pointed to the growing number of opponents of the British exit from the EU.
The dollar lost gains obtained after Tuesday's Federal Reserve Janet Yellen said during her speech in Congress that the rates will probably be necessary to increase gradually.
She added that the Fed "is closely monitoring global economic and financial developments", adopting a cautious approach to raising interest rates.
Yellen also warned that the vote in the UK for exit the EU could have serious economic consequences.