Karen Bass LA Mayor Runoff 2026: Odds and the September Poll

On this page

1. What the first round actually resolved
2. Why Bass still trades below the incumbent baseline
3. How Kalshi and Polymarket price the race
4. Strategy 1: buying the incumbency dip
5. Strategy 2: trading the runoff spread instead of the winner
6. Catalysts to watch before November 3
7. Where this fits in the 2026 California political board
8. Is this legal in California?
9. Keep reading
10. Sources & further reading

Live market odds

Update (September 29, 2026): The runoff between Mayor Karen Bass and Councilmember Nithya Raman is on November 3, 2026. A Berkeley IGS/Los Angeles Times poll taken September 15-20 had Raman ahead 39% to 28%, with 33% undecided. The market prices further down this page are from August; check the live market for today's price.

The June first round settled the question the markets spent the spring pricing: Karen Bass finished first, no candidate cleared 50%, and the LA Mayor race is now a Bass-vs-Nithya-Raman November runoff. As of August 7, 2026, Polymarket prices Bass at 65.5% to win and Raman at 31.1%, on a $13.1M event book: the deepest municipal contract in the country.

What the first round actually resolved

Three things resolved in June, and each one repriced the November book. Bass finished first: the "Bass finishes first in round one" contract settled YES. The margin market settled in the 5-10 point bucket, so she led Raman but not decisively. And no candidate won outright in the first round, which sent the top two to November.

The casualty was Spencer Pratt. His candidacy was the single most-traded contract of the cycle, nearly $7.9M of volume on his win market alone, and it settled NO. Lindsey Horvath ($1.7M), Rae Huang, Rick Caruso and Adam Miller all settled NO as well. Every dollar that was spread across a ten-name field is now concentrated in two contracts.

Why Bass still trades below the incumbent baseline

Mayors of major Democratic cities usually trade 75-85¢ heading into a general election; Bass sits at 65.5¢. Winning the first round moved her up sharply from the high-40s-to-low-60s range she held all spring, but the discount to a normal incumbent has not closed. Two crises explain why.

The 2025 Pacific Palisades wildfire put the LAFD response under a national microscope. Subsequent reporting on alleged Mayor's-office edits to draft after-action findings damaged her standing further. Separately, LA is staring at a near-$1B structural budget gap heading into FY26, with service cuts and hiring pauses depressing incumbent enthusiasm.

The April 2026 UCLA Luskin School of Public Affairs poll had Bass at 25%, Spencer Pratt at 11%, Raman at 9% and 40% undecided. That 40-point undecided block was the spring story. In a two-name November runoff it becomes a different question: those voters no longer split across ten names, they choose between an incumbent and a progressive council member.

How Kalshi and Polymarket price the race

Polymarket's Los Angeles Mayoral Election event has cleared $13.1M, with $737K on the Bass win contract and $1.26M on Raman's. The Raman book is now deeper than Bass's. Kalshi runs the same race through its multi-candidate winner market (kxmayorla-26). The two live prices sum to 96.6%, so there is a real 3-point gap where late entries or a write-in scenario would have to live; treat it as fee-and-liquidity slack rather than free money.

Strategy 1: buying the incumbency dip

The structural case for Bass is that undecided voters default to the familiar name. LA has not unseated a sitting mayor since 2005 (Hahn to Villaraigosa); Bass still holds party machinery, county-Dem endorsements, and most of the LA-County labor and business establishment. In a runoff, that establishment consolidation matters more than it did in a ten-way first round.

If you believe undecideds break for the incumbent, buying YES Bass on negative-headline dips (each new wildfire-report drop, each budget-cut disclosure) is the classic value trade. Size for spread. Kalshi's multi-candidate contract spreads 3-6¢ on Bass on calm days, wider during headline events. From 65.5¢, the arithmetic is less forgiving than it was at 50¢: you are paying a real premium for an incumbent the market still discounts.

Strategy 2: trading the runoff spread instead of the winner

The runoff itself is no longer a trade. It resolved. "Will the LA Mayor race go to a November runoff?" and "Will Bass and Raman advance to the second round?" both settled YES in June, which is why the pre-June income trade on those contracts is gone.

What replaces it is the spread between Bass at 65.5¢ and Raman at 31.1¢. If you think the race tightens without believing Raman wins, the cleaner expression is buying Raman rather than selling Bass: her book is the deeper of the two, so slippage is lower, and a 5-point tightening pays more on a 31¢ contract than the mirror trade pays at 65¢.

Bass won the first round and still trades at 65.5¢. The market is not pricing her defeat. It is pricing how much of the anti-incumbent vote Raman inherits.

Catalysts to watch before November 3

1. The first post-first-round public poll (LA Times, Berkeley IGS). A head-to-head number is a different instrument from the spring multi-way polling, and the first one will move both contracts 5-10¢.
2. Where the Pratt vote goes. Nearly $7.9M traded on his candidacy and his voters are now unassigned; any credible survey of their second choice is the highest-leverage data point of the fall.
3. Union endorsement flow. If the police or firefighter unions pull support over wildfire fallout or budget cuts, Bass drops sharply.
4. Televised runoff debates, where a two-name stage gives Raman the direct contrast she could not get in a ten-way field.
5. October 5, when California vote-by-mail ballots go to every registered voter, and LA's slow count, which can leave the result unresolved for days after election night.

Where this fits in the 2026 California political board

The LA Mayor race is the densest sub-municipal contract on Kalshi this cycle. For statewide context, see our California Governor 2026 guide; for the broader 2026 ballot, see our California 2026 elections guide. For LA-specific Pacific-coast coverage of the race, VenicePredictions.com tracks LA political markets; for an outcome-focused cross-platform view of the same Kalshi vs Polymarket contracts, PredictionWins.com tracks the spread.

Is this legal in California?

Available — dispute pending (as of October 13, 2026). Both Kalshi and Polymarket are CFTC-regulated and offer the LA Mayor 2026 contracts to California residents under federal commodities law. The CFTC's late-2024 election-contract authorization made political event contracts permanently legal at the federal level. For the full California regulatory picture, see our California legality guide.

Keep reading

• Nithya Raman LA Mayor Runoff 2026: September Poll Lead and Odds
• California Governor 2026: How to Trade the Race on Prediction Markets
• How Prediction Markets Price Celebrity Longshots: The Spencer Pratt Case Study

Keep the loop going

• This week's biggest price moves across the markets we track.
• Dated log of offer, ranking and state-availability changes so you know how current a page is.

Keep reading

• Kalshi vs Polymarket
• What's live in California this week

Frequently asked questions

What are the current LA Mayor 2026 odds?

As of August 7, 2026, Polymarket prices Karen Bass at 65.5% to win the November 3 runoff and Nithya Raman at 31.1%. The Los Angeles Mayoral Election event has cleared $13.1M in total volume, making it the deepest municipal contract in the country. The two live prices sum to 96.6%, leaving about 3 points of fee-and-liquidity slack.

What happened in the June first round?

Bass finished first and the margin market settled in the 5-10 point bucket over Raman. No candidate cleared 50%, so LA's top-two rule sent Bass and Raman to a November 3 runoff. The 'Bass and Raman advance' contract settled YES; the Bass-and-Pratt pairing, which had drawn $1.6M, settled NO.

Why is Bass still trading below the incumbent baseline?

A sitting Democratic mayor usually carries 75-85¢ into a general election; Bass sits at 65.5¢. Two factors keep the discount in place: the 2025 Pacific Palisades wildfire put the LAFD response under a national microscope, and subsequent reporting on alleged Mayor's-office edits to draft after-action findings damaged her standing; and LA faces a near-$1B FY26 budget gap, with service cuts and hiring pauses depressing incumbent enthusiasm.

Can I trade the LA Mayor runoff from California?

Yes. Polymarket lists single-candidate win contracts on Bass and Raman; Kalshi runs the same race through its multi-candidate winner market (kxmayorla-26). Both are CFTC-regulated event-contract venues, available to eligible California residents (dispute pending) 21 and older under federal commodities law.

Is the runoff contract still tradable?

No, it resolved. Both 'Will the LA Mayor race go to a November runoff?' and 'Will Bass and Raman advance to the second round?' settled YES in June, so the pre-June income trade on those markets is gone. The live trade is now the spread between Bass at 65.5¢ and Raman at 31.1¢.

What catalysts move Bass's price before November 3?

The first head-to-head public poll (LA Times, Berkeley IGS), which is a different instrument from spring multi-way polling and should move both contracts 5-10¢; where the Spencer Pratt vote goes, since nearly $7.9M traded on his candidacy and his voters are now unassigned; union endorsement flow, especially police or firefighter defection over wildfire fallout; televised runoff debates; and October 5, when California mails ballots to every registered voter.

Should I buy Bass or sell her at 65.5¢?

From 65.5¢ the incumbency-dip trade is less forgiving than it was at 50¢. If you think the race tightens without believing Raman wins outright, buying Raman is usually the cleaner expression: her book is the deeper of the two, so slippage is lower, and a 5-point tightening pays more on a 31¢ contract than the mirror trade pays at 65¢.

Where can I see Pacific-coast political market coverage?

VenicePredictions.com tracks Pacific-coast prediction-market angles including LA political races. PredictionWins.com tracks outcome-focused Kalshi vs Polymarket spreads on the same contracts.

How does California treat prediction market gains for local elections?

California treats these earnings as capital gains. If you trade on Kalshi, the platform provides a profit-and-loss statement for your trades. If you trade on Polymarket, you are responsible for tracking the cost basis and sale price of your positions to report the net profit on your annual state tax filings.

Can I use a credit card to buy LA Mayor contracts?

Kalshi accepts linked bank accounts, wire transfers and debit cards, but generally not credit cards. The Polymarket US app is funded in US dollars inside the app, with no crypto purchase or wallet needed. Card issuers often decline credit-card deposits for these platforms, so a bank transfer or debit card is the reliable route.