New York (CNN Business)

Joe Biden's biggest fan could be a bettor in the United Kingdom.

Someone has placed a £1 million, or $1.29 million, bet on Biden to be the next president on the Betfair Exchange, the world's largest online betting exchange, where gamblers find other gamblers who match their wagers.

The identity of the bettor, who placed the wager on October 29, is not known. They would win a £540,000 ($696,170) profit on top of getting the original £1 million wager returned.

Oddsmakers put Biden's chance of winning at 65%, and Trump's chances at 35%. That's slightly better odds for Trump than the 2-to-1 odds last week. And it's much better than the 10% chance of Trump winning according to FiveThirtyEight.

The £1 million wager is tied for the third-largest bet in Betfair's history, behind £1.1 million bet on tennis player Rafael Nadal in the 2010 French Open, and slightly more than £1 million bet on Floyd Mayweather Jr. in his 2017 match against Conor McGregor.

The bets are flowing into Betfair at a record pace, with £274 million, or $353 million, having been recorded by Monday morning. And it takes several days for a bet that has been made to show up in the data, which is why the October 29 bet has only now become known. So the total wagering on the vote is likely well above that level.

Since Betfair will allow bettors to keep wagering until a winner is declared, there could be days more betting, if not more, as vote counting goes on. Betfair is estimating total US presidential election wagers on its exchange will top £400 million, or twice what was wagered in 2016.

The winning bet will be who becomes the next president, not who wins the popularvote

The largest political bet ever made on Betfair Exchange was a £555,000 bet made on Trump in 2016 that came in at about 12:30 am ET, the day after the election, after most of the US polls had closed, but before he was declared a winner.

But the big money is not always right. Watt said one better wagered £550,000 on Hillary Clinton a month before that election. And there was a £100,000 bet made that UK would vote to remain in the UK during the 2016 Brexit vote.

MickzyDonald:
To me ooo,i still prefer Trump to Biden.........
US doesn't know the importance the man has brought to Their state,but once he leaves there you will know see them stylishly demanding for his intervention....
The country needs someone who is A little bit CRAZY and i can vow,that is DONALD TRUMP......God bless America

GamalNasser:
His money is gone

Stephenmoka4:
I will be honest, I will like to see a new president, probably give foreigners more choices

Stephenmoka4:
I will be honest, I will like to see a new president, probably give foreigners more choices

MickzyDonald:

I support that,but,do you know the damages Nigerians have caused to the Country,i guessed it was our country that triggered Trump on the Visa Banning Issue....I just like the way he runs the post,he doesn't give a shit about whoever it is,The man stood for his country,have you forgotten the issue between USA and Iranian government,the guy threatened those people but many people doesn't realize he made the country stronger as at that time.... Imagine telling someone,Take one from me,and I'll make you loose ×10....But it's your choice after all

Faithful007:
can you statistically show me how Nigerians have damaged the United States please? You people will be in Nigeria and conclude what is happening in the US.

9jaDoomCountry:



America is what it is because of control. But when you throw your border open as nigeria northern borders you can imagine the result.

Let Americans keep receiving themselves with the sweet tongues like Obama.

MickzyDonald:

I support that,but,do you know the damages Nigerians have caused to the Country,i guessed it was our country that triggered Trump on the Visa Banning Issue....I just like the way he runs the post,he doesn't give a shit about whoever it is,The man stood for his country,have you forgotten the issue between USA and Iranian government,the guy threatened those people but many people doesn't realize he made the country stronger as at that time.... Imagine telling someone,Take one from me,and I'll make you loose ×10....But it's your choice after all

MickzyDonald:
To me ooo,i still prefer Trump to Biden.........
US doesn't know the importance the man has brought to Their state,but once he leaves there you will know see them stylishly demanding for his intervention....
The country needs someone who is A little bit CRAZY and i can vow,that is DONALD TRUMP......God bless Americathe new Nigeria we are fighting for,