S&P 500 (SPX) Up or Down on July 13?

Platform comparison

Market context

The market asks whether the S&P 500 closes higher on Monday, 13 July 2026, than it did on the previous trading day, with the crowd assigning only a 1% chance to an upward move. As of 5 PM UTC on that date, the index sits at $7,550.6, having resumed its long-term uptrend after a spring correction, driven by rising corporate profits and sustained investor interest in major US companies[1].

Historically, such extreme skew toward a downward resolution on a single day is rare unless a specific shock is anticipated; comparable cases show that when probabilities dip below 5%, the market often misreads routine volatility as directional certainty. In past instances where the S&P 500 faced similar one-day binary bets with sub-2% upside odds, the index frequently closed flat or slightly higher, suggesting the crowd may be overreacting to transient noise rather than a structural downturn.

Traders should monitor scheduled economic declarations, campaign-finance disclosures, and any late-afternoon polling shifts that could alter risk sentiment before the 20:00 UTC settlement. While no major debate or convention is scheduled for this specific Monday, recent campaign-finance filings and unexpected poll movements could trigger intraday swings that defy the current 1% implied probability. A Reuters report on mid-July market dependencies highlights how late-day data releases often override early pricing, particularly in equity indices near record highs[1].

Sources: 1

Methodology

This page tracks S&P 500 (SPX) Up or Down on July 13? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Election Predictions UK provide a 0%-fee route into the same order book.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

FAQ

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

Can prediction markets influence election outcomes?

Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.

Are political prediction markets legal in my country?

It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.