* Dollar, yen sold this week as stimulus hopes boost mood
* Yuan leaps as China returns; strong fix, Biden prospects boost
* 10% gain in oil prices this week lifts oil exporters' currencies
* Graphic: World FX rates in 2020 https://tmsnrt.rs/2RBWI5E
By Tom Westbrook
SINGAPORE, Oct 9 (Reuters) - The dollar drifted toward a small weekly loss on Friday, while the Chinese yuan soared to a 17-month high, as investors wagered on a Joe Biden presidency and on more U.S. stimulus spending.
The yuan's leap, when China's markets reopened after the Mid-Autumn break, was partly a catch-up since the offshore yuan has gained against a softening dollar during the week.
But as it extended gains beyond 1%, its biggest daily jump in nearly two years, traders said it provided one of the clearest indications yet that Biden's lead in the polls is driving bets on a steadier Sino-U.S. relationship. CNY/
A stronger-than-expected setting of the yuan's trading band also signalled that policymakers in China don't mind its rise.
The yuan CNY= was last up 1% at 6.7218 per dollar in onshore trade and it rallied half a percent to 6.7083 per dollar offshore CNH=D3 . The dollar eased 0.1% against a basket of currencies =USD and it is down 0.4% for the week.
"I think the main message is that the (People's Bank of China) is allowing further renminbi appreciation at this level," said Ken Cheung, chief Asian FX strategist at Mizuho Bank in Hong Kong. "So markets are positioning for a renminbi rally."
The prospect of a Biden administration less inclined toward tariffs and trade disputes was another boost, he added.
"Polls are showing that Biden is taking the lead... it means the risks of resuming a new trade war are getting smaller, so I think this is positive for the renminbi."
Reuters/IPSOS polling this week put Biden, a Democrat, narrowly ahead of Republican President Donald Trump in five states - Wisconsin, Pennsylvania, Michigan, Florida and Arizona - that will play critical roles in deciding the victor. HOPES
A growing expectation that, whoever wins, U.S. stimulus spending will flow has also been weakening the dollar in the short term, by improving investors' mood and their willingness to buy riskier assets such as stocks and commodity currencies.
Talks have resumed between House Speaker Nancy Pelosi and Treasury Secretary Steven Mnuchin over coronavirus aid plans, two days after President Donald Trump ended them, and investors reckon a Democratic administration would be eager to spend. uncertainty is more around whether it will happen before the election and how big it will be," said Rodrigo Catril, senior FX strategist at National Australia Bank in Sydney. "Investor confidence is growing that Biden will win the presidential election by a clear margin, reducing the risk that Trump disputes the result."
The risk-sensitive Australian dollar AUD=D3 rose 0.1% on Friday to put it a fraction higher for the week, despite analysts interpreting a Tuesday central bank statement as a signal of monetary easing to come.
The New Zealand dollar NZD=D3 likewise recouped Thursday losses made after another dovish signal from the Reserve Bank of New Zealand and was last up 0.3% at $0.6602.
The safe-haven Japanese yen JPY= , which has been sold with the upbeat mood, was a tiny bit higher at 105.87 per dollar on Friday. It is down about 0.5% this week.
The euro EUR= was up 0.1% to $1.1773 and sterling GBP= crept higher to $1.2951 and has held firm this week as prospects for a Brexit deal have appeared to improve.
Elsewhere, a 10% surge in oil prices this week, on optimism about stimulus and supply disruptions owing to a storm in the Gulf of Mexico and strike in Norway, has boosted oil-linked currencies. O/R
The Canadian dollar CAD=D3 is set for its best weekly rise in more than two months, adding 0.9% to C$1.3185 per dollar. The Russian rouble RUB= has also gained about 1% for the week.
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Currency bid prices at 10:55AM (255 GMT) Description
RIC
Last
U.S. Close Pct Change
YTD Pct
High Bid
Low Bid
Previous
Change
Session
Euro/Dollar
EUR=EBS
!RIC
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{EUR=EBS} is {EUR=EBS} {EUR=EBS} is {EUR=EBS} {EUR=EBS} {EUR=EBS}
invalid
is invalid invalid%
is
is invalid is invalid
invalid%
Dollar/Yen
JPY=D3
105.8250
106.0300
-0.17%
-2.54%
+106.0270 +105.8300 Euro/Yen
EURJPY=
124.64
124.69
-0.04%
+2.21%
+124.7600 +124.5300 Dollar/Swiss
!RIC
!RIC
!RIC
!RIC
!RIC
!RIC
{CHF=EBS} is {CHF=EBS} {CHF=EBS} is {CHF=EBS} {CHF=EBS} {CHF=EBS}
invalid
is invalid invalid%
is
is invalid is invalid
invalid%
Sterling/Dollar GBP=D3
1.2953
1.2933
+0.15%
-2.34%
+1.2954
+1.2930 Dollar/Canadian CAD=D3
1.3185
1.3197
-0.08%
+1.51%
+1.3197
+1.3180 Aussie/Dollar
AUD=D3
0.7181
0.7168
+0.20%
+2.36%
+0.7183
+0.7168 NZ
NZD=D3
0.6606
0.6582
+0.38%
-1.81%
+0.6607
+0.6584 Dollar/Dollar
All spots FX= Tokyo spots AFX= Europe spots EFX= Volatilities FXVOL= Tokyo Forex market info from BOJ TKYFX 124.64