UK General Election - which party will win the second most seats?
Nov 24
Conservative Party
Liberal Democrats

The UK is due to hold a general election within the next few months. When will it be exactly? See here - /SimonGrayson/uk-general-election-which-month-in-6ab8406103dd

It seems like a foregone conclusion that Labour will get the most seats, and even enough seats to form a majority (more than every other party put together):



Until recently it also seemed like a foregone conclusion that the Tories would come second. But a truly awful few months for them means this might no longer be guaranteed. One Yougov poll this week put them at 19% - if it gets much worse than that then they could be facing a wipeout under FPTP!

We’re predicting there’s a good chance that this could be their worst election for over a century, but could it get even worse than that? /SimonGrayson/will-the-conservative-party-win-few

Which party will win the second most seats?

Feel free to add more parties if you think I’ve missed anyone who’s got a chance!

Get Ṁ600 play money
Sort by:

conservatives should be 90%+

So buy my limit order! evil laughter

loan me 50k manas ill pay back in a week

tbh I'll take it down, I just placed it there because I'm not following the election other than copying other prediction markets, and there's none im aware of on poly about this, so I have no clue, and yesterday i traded on the volatility and this was a sell order but nobody seems capable of taking it

opened a Ṁ100 Conservative Party NO at 90% order

Betfair Exchange has a real money market that's equivalent to this one, and the odds will look very good to you if you believe it's 90%+

90% seems reasonable based on my research

What information warrants that level of confidence? The variance among the MRPs alone demonstrates the uncertainty in seat numbers under these polling figures, and they were all done before Reform's surge

I have no information and i cant even access that website.. but jim thinks the correct price's 90%, and his argument was quite compelling

bought Ṁ10 Liberal Democrats YES

It seems overconfident to me. And yeah the implied probability for the Conservatives being the second largest party are currently around 75% according to the odds on Betfair:

They were more like 90% at the end of May (when I placed my little £10 bet for the Lib Dems)

@finn you're a bad influence. Just placed my first ever real money bet! I've never been even slightly tempted before now, but these odds just seem so far off to me.

(To be clear, I'm joking when I say you're a bad influence. Please don't feel bad for the small part you have played in my inevitable slide into becoming a total degen.)

@Fion Hahaha, you're very welcome

I think this might be the best-value election market right now (70% chance of Conservatives coming second at time of posting this comment). My estimate is probably about 92% but my balance is chronically struggling since the pivot so I can't correct it myself.

Also, as Mike H noted a couple of weeks ago, it's still true that Labour are still pretty good value here, at 0.3% chance of coming second. Compare to, for example:

which is at 95% right now. Plenty of arb potential if somebody has the balance. I reckon the chances of Labour coming second are almost 1%. The chances of Starmer being the next PM, correspondingly, are over 99%. (If anything the two should add up to slightly more than 100% because there are scenarios in which Labour are the second largest party but still able to form a government.)

Edit: I just realised that Simon already linked to a market about whether Labour will win a majority, at 94%. Another option to arb with their 0.3% here if desired. We're three weeks from results time. 5% in 3 weeks is probably pretty good return?

I really think Labour being the second largest party is under 1% — it's just that there's little reward for people to bet Labour up past 99% on the other markets when there's 3 weeks until resolution time. The reason this one is so low is simply because the tussle between people betting 'yes' on the Conservatives and Lib Dems coming second has pushed all the other options down to their realistic levels.

I personally think the right price for the Conservatives on this market is roughly 70-75%, though it's plausible my judgement may be clouded.

(Betfair Exchange odds for Conservatives to win 'Most Seats Without Labour' have dropped to 1.37 [73%] for the Conservatives if you're still confident it's ~92%! Though I don't want to encourage you too much, particularly as I think you ought to bet the other way, if anything.)

Yeah, agreed on Labour coming second being <1%. But if any risk-averse people wanted to bet some of those 94s and 95s up to 99, this would be the market to hedge their bets on.

I'm confused what this "has dropped to 1.37" means. The bet I placed on Sky was 1/3, meaning I get back £1.33 for every £1 I spend. So I guess the 1.37 on Betfair corresponds to 1.33 on Sky. But 1.33 is 75%. If Betfair is 73% that means it's better for me than Sky. So correspondingly, I want the "1.37" number to be as large as possible, right? When you said "dropped", did you mean the percentage has dropped (corresponding to the odds going up)?

I wish all these real money betting websites would just use percentages like a sane person.

Oh sorry yeah I meant the implied probability dropped, rather than the decimal odds dropping. You want the decimal odds to be higher for the thing that you think is likely to happen (as it implies that the people you're betting against think it's not so likely).

I do actually quite like decimal odds, as it does communicate the tiny returns you get for the money you lay down when the chances approach, say, >90%.

Also, it's not immediately obvious on Manifold, for instance, that winning a bet you placed at 20% 5xes your money, while one at 30% (a seemingly small difference) only 3.3xes your money. Those 10 percentage points mean a lot more there than they do between 85% and 95%.

I think it's nice to browse probabilities when you want to know what's likely to happen, but nice to use decimal odds to see where you might get a nice return.

bought Ṁ10 Labour YES

Labour is underpriced here vs other markets

Another limit order up for the Lib Dems if anyone feels really good about Ed what's-his-face's chances...

@Tomoffer I'm guessing you'll want to bet it down from its current price (32%)

More related questions