# Why Kalshi Prices Crypto Long Shots Higher Than Polymarket

> Our view: Kalshi prices bitcoin and ether tail outcomes higher than Polymarket because its marginal buyer of long shots is a US retail taker with one venue, and nobody is paid to close the gap. On November 11, 2026, Kalshi was higher on 18 of 19 matched rungs; after both venues' taker fees, the executable gap was worth about $38.

Published 2026-11-11 by CryptoPrediction Desk. Canonical: https://cryptoprediction.news/kalshi-polymarket-tail-gap-opinion/

## Key points

- At 5:11 p.m. ET on November 11, 2026, Kalshi priced 18 of 19 matched BTC and ETH 2026 high and low rungs above Polymarket, by up to 2.35 points.
- On seven rungs we checked, Kalshi's best bid sat 0.5 to 1.6 cents above Polymarket's best ask, a crossed market across venues.
- Both venues charge takers 0.07 × p × (1 − p); after both fees, the crossed size at the top of both books was worth about $38 on roughly $9,800 of capital.
- The contract rules point the other way: Polymarket pays on a single exchange's one-minute candle, Kalshi on a multi-exchange index with trimmed-mean language.
- Kalshi's own data shows buyers of contracts under 10 cents lost over 60% of their money from 2021 to April 2025; a September 2026 Polymarket study found 19.3 cents per dollar.


Our view: Kalshi prices bitcoin and ether tail outcomes higher than Polymarket because its marginal buyer of long shots is a US retail taker who can trade on only one of the two venues, and because nobody is paid enough to close the gap. The difference is real, it has held for days, and at executable prices it is about the size of the two venues' taker fees combined. Read that way, the gap measures what Kalshi's long-shot buyers pay for having one venue.

That is an argument. The facts it rests on are below, and the live numbers are on our [cross-venue comparison pages](/compare/).

## What the market is pricing

Midpoints of the best bid and ask, read from each venue's public market data at 5:11 p.m. ET on November 11, 2026 (22:11 UTC). Bitcoin traded at $74,446 and ether at $2,071.30 at that time, per [CoinGecko](https://api.coingecko.com/api/v3/simple/price?ids=bitcoin,ethereum&vs_currencies=usd).

| Level, 2026 | Polymarket (%) | Kalshi (%) | Kalshi minus Polymarket (points) | As of |
|---|---|---|---|---|
| BTC reaches $100,000 | 5.5 | 7.5 | +2 | Nov 11, 2026 |
| BTC reaches $110,000 | 2.2 | 3.5 | +1.3 | Nov 11, 2026 |
| BTC falls to $50,000 | 5.05 | 6.5 | +1.45 | Nov 11, 2026 |
| BTC falls to $45,000 | 2.65 | 5 | +2.35 | Nov 11, 2026 |
| BTC falls to $40,000 | 2.45 | 4.5 | +2.05 | Nov 11, 2026 |
| ETH reaches $3,500 | 3.3 | 5.5 | +2.2 | Nov 11, 2026 |
| ETH falls to $1,500 | 12.25 | 14 | +1.75 | Nov 11, 2026 |
| ETH falls to $1,250 | 6.5 | 8.5 | +2 | Nov 11, 2026 |
| ETH falls to $1,000 | 3.55 | 4.5 | +0.95 | Nov 11, 2026 |

Across all 19 levels listed on both venues, Kalshi was higher on 18. The one exception, ether at $4,500, was 0.05 points the other way. Our [bitcoin](/bitcoin-year-end-odds/) and [ether](/ethereum-2026-ladder/) ladder pieces found the same pattern on November 10 and 11, and each [compare page](/compare/bitcoin-2026-high/) refreshed during the day showed it again.

## Is the gap real, or just a quoting artifact?

It shows up at prices someone could trade. On seven rungs we checked in both order books at about 22:13 UTC, Kalshi's best bid was above Polymarket's best ask. On bitcoin reaching $100,000, Kalshi buyers bid 7 cents for 8,064 contracts while Polymarket sellers offered 2,870 shares at 6 cents. On ether reaching $3,500, the Kalshi bid was 5 cents and the Polymarket ask 3.4 cents. A crossed market between two venues is the textbook signal that money could be made by buying on one and selling on the other.

That money is small. Polymarket's [fee schedule](https://docs.polymarket.com/trading/fees) charges crypto takers C × 0.07 × p × (1 − p), and Kalshi's general fee, per [Allium's breakdown](https://allium.so/blog/kalshi-fees-why-the-cost-peaks-near-50-cents/), is the same 0.07 × C × P × (1 − P), rounded up to the next cent. Applying both to the crossed quotes, by our arithmetic:

| Rung | Gross gap (cents) | Both taker fees (cents) | Net per pair (cents) | Crossed size |
|---|---|---|---|---|
| BTC reaches $100,000 | 1.0 | 0.85 | 0.15 | 2,870 |
| BTC falls to $50,000 | 0.9 | 0.73 | 0.17 | 4,390 |
| BTC falls to $40,000 | 1.5 | 0.44 | 1.06 | 1,606 |
| ETH reaches $3,500 | 1.6 | 0.56 | 1.04 | 932 |
| ETH falls to $1,500 | 0.5 | 1.56 | −1.06 | 5 |
| ETH falls to $1,250 | 1.0 | 0.97 | 0.03 | 132 |

Add the bitcoin $45,000 rung, crossed for five shares, and the whole opportunity at the top of both books came to about $38, on roughly $9,800 of capital held until January 1, 2027. That is a 0.39% return over seven weeks before the risks below. The gap survives because closing it does not pay.

## Do the contract rules explain it?

They point the other way. Polymarket's ladder resolves Yes if any Binance BTC/USDT or ETH/USDT one-minute candle trades through the level, according to the rule text quoted on our compare pages. Kalshi's contracts resolve on CF Benchmarks indices; [CF Benchmarks](https://www.cfbenchmarks.com/data/indices/BRTI) describes its bitcoin index as aggregating order data from the bitcoin-dollar markets of several major exchanges. Kalshi's [secondary rules](https://api.elections.kalshi.com/trade-api/v2/events?series_ticker=KXETHMINY&status=open&with_nested_markets=true) add a trimmed-mean calculation that drops the top and bottom 20% of minute values.

Our read: a single exchange's one-minute high or low is, if anything, easier to reach than a composite index. If rules drove the gap, Polymarket's touch contracts would be the richer ones. They are the cheaper ones on 18 of 19 rungs.

Ticks explain part of the far tails. Kalshi quotes in whole cents, and Polymarket quotes most of these rungs in tenths of a cent, according to each venue's market data. A Kalshi rung bid at 0 and offered at 1 cent has a midpoint of 0.5 or 1, which is why bitcoin at $200,000 shows 0.5% against 0.25%. That cannot explain bitcoin at $100,000, where both books are several ticks deep on each side.

## Who can trade where?

The traders who could close the gap and the traders who create it are mostly different people.

- **US residents** are close-only on Polymarket's international venue: they can exit positions but cannot open new ones, per Polymarket's [geoblock documentation](https://docs.polymarket.com/api-reference/geoblock). The yearly crypto ladders we compare trade there.
- **Kalshi** said in October 2025 that it was available in over 140 countries, [Cointelegraph reported](https://cointelegraph.com/news/kalshi-300-million-raise-prediction-markets-140-countries). International users fund by debit card, wire (minimum $1,000) or crypto, per Kalshi's [help center](https://help.kalshi.com/en/articles/14026044-international-access-eligibility).
- **Interest** splits the same way. Kalshi pays 3.50% APY on cash and open positions, only to eligible US users with a $250 average balance, per its [APY page](https://help.kalshi.com/en/articles/13823847-apy-on-kalshi). Polymarket pays a 3.25% holding reward on eligible markets, including its bitcoin and ether price targets, per its [help center](https://help.polymarket.com/en/articles/13364459-holding-rewards); the ladder rungs show holding rewards enabled in Polymarket's market data.

So the one trader who can hold both legs, someone outside the US, parks about 95 cents per pair in a Kalshi position that earns no interest, to collect a fraction of a cent. The US trader who earns Kalshi's interest cannot buy the Polymarket leg. Settlement on different price sources adds a basis risk that neither side is paid for.

## What does it say about each venue's traders?

On Kalshi, the evidence on cheap contracts is stark. Constantin Bürgi, Wanying Deng and Karl Whelan of University College Dublin [studied over 300,000 Kalshi prices](https://www.karlwhelan.com/Papers/Kalshi.pdf) from 2021 to April 2025 and found that "investors who buy contracts costing less than 10c lose over 60 percent of their money." The bias held for both makers and takers and in every category they tested, crypto included, though they excluded hourly crypto markets and found some sign of it weakening in 2025.

On Polymarket, a [September 2026 study](https://arxiv.org/abs/2609.12878) by Marcos Cardozo and José Ignacio Rivero-Wildemauwe found that purchases below 10 cents lost 19.3 cents per dollar in transaction flows, and that the pattern held in crypto markets. The two studies cover different periods and use different methods, so the numbers do not line up one for one. Both say long shots are overpriced, and the Kalshi figure is the larger.

Our read of the people behind the prices: Kalshi's marginal tail buyer is a US retail taker buying a cheap contract on the only regulated app they use, and Polymarket's tails are set by a book with finer ticks and a 20% maker rebate in crypto that rewards posting tighter quotes. The Kalshi premium is the price of that difference.

## What is the strongest case against this view?

It runs like this. The executable gap is inside both venues' fees, so in any practical sense the two venues agree, and a few cents of midpoint difference on contracts with whole-cent ticks is noise. And if anything, Polymarket might be the one mispricing: its crypto traders could be too confident that bitcoin and ether will sit quietly into year-end, and Kalshi's buyers could be right to pay for the tails.

We accept the first half. Fees set the width of the band, and on bitcoin at $100,000 the gap is inside it. What fees do not set is the sign. A quoting artifact would put Kalshi above on some rungs and below on others; instead it is above on 18 of 19, on both the upside and the downside, against contract rules that favor Polymarket's side. On the second half, we take no view on where bitcoin or ether will trade, and nothing here is a reason to trade either venue. The published record on both platforms is that cheap contracts win less often than their price implies, which makes the higher of two long-shot prices the one more likely to be too high.

## What would change our mind

- A sustained period in which Kalshi prices the same tails below Polymarket, with no change in fees or access.
- A study of Kalshi's yearly crypto high and low contracts showing no favorite-longshot bias, or one showing Polymarket's crypto long shots win more often than priced.
- Evidence that Kalshi's tail buyers are hedgers, such as miners or funds insuring a position, paying a premium for protection they need.
- The gap persisting after the same US accounts can trade both ladders, which would point to beliefs over access. If it closed, that would support our view.


## FAQ

### Why are Kalshi odds different from Polymarket on bitcoin?

The two venues have different traders, fees, access rules and settlement sources. As of November 11, 2026, Kalshi priced 18 of 19 matched bitcoin and ether tail outcomes higher, by up to 2.35 points, and the gap at executable prices was about the size of both venues' taker fees combined.

### Can you arbitrage Kalshi and Polymarket?

On November 11, 2026, Kalshi's best bid exceeded Polymarket's best ask on several crypto rungs, but after both taker fees the available size was worth about $38 in total. US residents also cannot open new positions on Polymarket's international venue, and the two contracts settle on different price sources.

### What is the favorite-longshot bias in prediction markets?

It is the tendency for cheap contracts to win less often than their price implies and expensive ones to win slightly more often. A University College Dublin study of Kalshi found buyers of contracts under 10 cents lost over 60% of their money; a 2026 Polymarket study found smaller losses on low-price purchases.

### Is Kalshi or Polymarket more accurate for crypto prices?

Neither venue publishes a crypto-specific accuracy record for its yearly ladders. Published research finds long shots overpriced on both, with larger losses for Kalshi's low-price buyers, though the studies use different periods and methods.

### Do Kalshi and Polymarket use the same bitcoin price?

No. Polymarket's 2026 ladder resolves on any Binance BTC/USDT one-minute candle high or low, while Kalshi's yearly high and low contracts resolve on the CF Bitcoin Real-Time Index, which aggregates several exchanges' bitcoin-dollar markets.

## Sources

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- [Polymarket vs Kalshi: how low will Bitcoin go in 2026?](https://cryptoprediction.news/compare/bitcoin-2026-low/), CryptoPrediction, 2026-11-11
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