What a Negative-Risk Multi-Outcome Event Is

A simple prediction-market is two tokens on one question. Yes pays a dollar if that thing happened. No pays a dollar if it did not. The pair is minted from a dollar and can be merged back into a dollar. That is one market.

A multi-outcome event is several of those markets sitting under one headline — who wins the race, which candidate, which team. The extra names are not a third token on the same pair. Each name is its own Yes and its own No. What happens next depends on whether the venue has linked those markets or left them independent.

This page is about that link, on one documented venue, retrieved 2026-08-15T06:05Z. Official docs there call the link negative risk. The name is the vendor's. The pages never say it means you cannot lose money. It does not.

What this page does not claim. It does not claim that a live book sums to a dollar. It does not tell you to convert a No, to buy every other Yes, or to avoid an "Other" outcome. The Trump / Harris / Other table below is a documentation illustration on the negative-risk page, not a live 2026 book. Why complementary prices should add up to about a dollar — including what an under-$1 or over-$1 sum means — is a separate companion. This is not a rewrite of that piece.

A market is a pair. An event can be several pairs.

On the positions-and-tokens page (retrieved 2026-08-15T06:05Z), each market has exactly two outcome tokens, ERC-1155 on Polygon, using the Gnosis Conditional Token Framework. Yes redeems $1.00 if the event occurs. No redeems $1.00 if it does not. Every Yes/No pair in existence is backed by exactly $1 of collateral locked in the conditional-token contract.

Three operations move money between collateral and that pair.

Split: $1 of collateral becomes 1 Yes and 1 No.

Merge: 1 Yes and 1 No become $1 of collateral again.

Redeem: after resolution, each winning token becomes $1 and each losing token becomes $0.

That is the simple Yes/No machine. Depth on why those two prices should add up to about a dollar lives on the companion page. This page only needs the pair, so it has something to contrast.

Standard multi-outcome: independent markets

Official docs (retrieved 2026-08-15T06:05Z) describe a standard multi-outcome event as several markets that stay independent. If you hold No on one named outcome, those No tokens have no official relationship to the other outcomes. The how-positions-work table puts it in one cell: multiple outcomes, for standard markets, are "Independent markets." There is no conversion bridge.

Adding Yes prices across independent markets and expecting a dollar is a different claim. It is not on the three pages this guide used. This page does not make it.

Negative risk: the same pairs, linked by a conversion

Negative risk, on the retrieved negative-risk page, is a mechanism for multi-outcome events where only one outcome can win. Positions across the event are related through a conversion.

The conversion the page writes down is one direction. You hold 1 No token for outcome A. You call convert on the Neg Risk Adapter. You receive 1 Yes token for every other outcome in the event. The page says that operation is atomic.

The how-positions-work table matches: negative-risk markets still use the ConditionalTokens contract, but they trade on a Negative Risk CTF Exchange, and multiple outcomes are "Linked through conversion." Standard markets trade on a CTF Exchange. The docs point to a separate Contracts page for addresses. That page was not opened here. Addresses are UNKNOWN.

The pages do not describe the inverse — turning a set of Yes tokens back into a No. Whether that path exists on this venue is UNKNOWN from these three pages.

The official illustration — not a live book

The negative-risk page's own example is an event titled "Who will win the 2024 Presidential Election?" with three outcomes: Trump, Harris, Other. Start: 1 No on Other. After conversion: 1 Yes on Trump, 1 Yes on Harris, and nothing on Other.

That table is a documentation illustration, retrieved 2026-08-15T06:05Z. It is not a live order book, not a fill, and not a claim that those Yes prices — or any live Yes prices — sum to $1.00. This page will not say a live book sums to a dollar.

"Economically equivalent" is a conversion identity, not a tip

The same page says the conversion is capital-efficient because betting against one outcome is economically equivalent to betting for all other outcomes. That is vendor wording for the identity the adapter implements: 1 No on A is the converted form of 1 Yes on every other named outcome in that event.

This page reports the identity. It does not tell you to convert. It does not say the path is cheaper after costs. Fees, gas, and fill risk are not on the three pages this guide used. They are UNKNOWN here. The companion complementary-prices and fees guides own those caveats for the $1 pair; they are not smuggled in as a how-to on this page.

The name does not mean you cannot lose

Nothing on the three retrieved pages defines "negative risk" as a locked profit, a floor of zero loss, or a reason to size up. The mechanism is a conversion between a No and everyone else's Yes, in an event where only one outcome can win. You can still hold the losing side of a pair. You can still hold a named outcome that does not win. The name is not a guarantee.

Why the vendor chose that name is UNKNOWN from these pages.

When the outcome list is not finished: augmented negative risk

Standard negative risk, on the retrieved page, needs the complete set of outcomes at market creation. The page says new outcomes sometimes appear after trading begins — their example is a new candidate entering a race.

Augmented negative risk is the documented answer. Three outcome types:

Named outcomes: known names (the page's examples are "Trump", "Harris").

Placeholder outcomes: reserved slots that can be clarified later (the page's example is "Person A").

Explicit Other: catches any outcome not explicitly named.

The documented sequence: the event launches with named outcomes plus placeholders plus Other. When a new outcome emerges, a placeholder is clarified via the bulletin board. Other's definition narrows as placeholders are assigned.

What the vendor page says about placeholders and Other

The retrieved negative-risk page states three rules in its own voice.

Only trade on named outcomes. Placeholder outcomes should be ignored until they are named or until resolution. The Polymarket UI does not display unnamed outcomes.

If the correct outcome at resolution is not named, the market resolves to Other.

Other's definition changes as placeholders are clarified — the page says "avoid trading it directly."

Those sentences are documented vendor instructions as of 2026-08-15T06:05Z. This guide reports them. It does not add a Sloppy Stakes recommendation to trade, skip, convert, or avoid anything.

What to do with a screen full of names

Count the markets, not the headline. Each named outcome is still a Yes/No pair. Ask whether the event is standard (independent pairs, no conversion bridge) or negative-risk (pairs linked by an atomic convert of 1 No into 1 Yes on every other outcome). If the event is augmented, named, placeholder, and Other are different objects on the vendor's page.

Do not read the word "negative risk" as "cannot lose." Do not treat a documentation illustration as a live book. Do not add the numbers on the screen and conclude they must be a dollar — that identity is the companion page's job, and this page does not claim a live book sums to $1.

Wallet profitability, complementary gaps, and 2026 fees are separate pieces.