* Graphic: sterling and gilt yields bit.ly/2dgAXn1
* Graphic: World FX rates in 2017 tmsnrt.rs/2egbfVh
* Graphic: Trade-weighted sterling since Brexit vote tmsnrt.rs/2hwV9Hv
By Saikat Chatterjee
LONDON, Oct 4 (Reuters) - Sterling held near the day’s highs on Wednesday after a survey of Britain’s dominant services sector showed growth sped up unexpectedly last month.
But the mood concerning the pound’s outlook remained more downbeat due to uncertainty over Brexit negotiations.
The monthly purchasing managers’ index (PMI) for the services sector picked up to 53.6 in September, slightly better than expectations in a Reuters poll of economists and easily above the 50 level that separates growth from contraction.
Sterling climbed 0.4 percent to $1.3283, just shy of the day’s highs and moving further away from a three-week low of $1.3222 in the previous session.
Against the euro, the pound was a shade stronger at 88.635 pence per euro.
“While the short-term risks to demand since the Brexit vote have not materialised in a serious way, the UK economy should be faring much better today on the back of the ongoing global upswing,” said Kallum Pickering, senior UK economist at Berenberg in London, who expects a rate increase in November.
Some of the optimism surrounding sterling after the data was punctured by comments from ratings agency Standard & Poor‘s, which said it was “a bit sceptical” about the notion that Britain’s economy needed an interest rate increase.
Uncertainty about the outcome of the negotiations on Britain’s divorce from the EU dragged sterling down to three-week lows in the previous session. It has fallen more than 10 percent against the dollar since the summer 2016 ‘leave’ vote.
Brexit minister David Davis told the conference of Britain’s governing Conservative Party on Tuesday that Britain wanted to negotiate an exit agreement but was prepared to walk away with no deal.
In her keynote speech to the conference on Wednesday, which had no immediate impact on the currency market, Prime Minister Theresa May said she was confident of getting a deal that would work for both sides.
Reporting by Saikat Chatterjee; editing by John Stonestreet