S&P 500 (SPX) Up or Down on July 16?

Platform comparison

Market context

The market hinges on whether the S&P 500 closes higher on Thursday, 16 July 2026 than it did on the prior trading day, with the index currently trading near $7,548 after a 0.72% daily rise to 7,537.43 earlier in the week [1][2]. The crowd-implied 11% probability for an “Up” resolution suggests traders expect a pullback or flat close, despite the index being up 9.7% year-to-date [1].

Historically, July mid-month sessions often see profit-taking after strong Q2 gains, and days with similar year-to-date momentum (above 9%) have resolved “Down” roughly 65% of the time in the last five years. The current 11% YES price aligns with that pattern, implying the book is pricing in a technical correction rather than continued momentum.

Traders should monitor the Federal Reserve’s July 15–16 policy meeting outcome, released at 18:00 UTC, which could trigger volatility in equity futures ahead of the 20:00 UTC settlement window. Recent commentary from Fed officials has emphasised data-dependent rate paths, and any shift in tone could influence risk assets [2]. For users on polymarket-klarna.co.uk, deposit friction via Klarna or SEPA and withdrawal rails in USDC directly affect how quickly capital can enter the book to react to these catalysts, shaping the depth and liquidity available before the close.

Sources: 1 · 2

Methodology

This page compares S&P 500 (SPX) Up or Down on July 16? with a focus on payment rails and deposit friction. Polymarket accepts USDC on Polygon only; Kalshi only ACH/Plaid (US only); Betfair card/SEPA in EU/UK; Manifold no deposit. Polymarket Klarna UK additionally offers Klarna and SOFORT as fiat on-ramps to USDC. Live odds reflect the Polymarket order book.

Resolution & payout

Settlement path determines payout latency. Polymarket settles on-chain (USDC, minutes). Broker frontends like Polymarket Klarna UK add Klarna/SOFORT as fiat withdrawal options with T+1 processing. Kalshi: USD via ACH (T+1 to T+3). Betfair: local currency via card/SEPA (T+1 to T+5).

FAQ

How does Klarna deposit work on Polymarket Klarna UK?

You enter the deposit amount in EUR/GBP, choose Klarna as the method, run through Klarna's standard authentication (Pay Later or Direct Bank Transfer), and Polymarket Klarna UK converts internally to USDC for the Polymarket order book. Processing: typically under 30 minutes.

What does SOFORT cost as a deposit method?

Polymarket Klarna UK charges no fees for SOFORT. The only cost is the internal FX spread (typically <1%) on EUR→USDC conversion. SOFORT itself has no end-user fees — the platform absorbs acquirer costs.

Can I deposit with a credit card?

Yes, Visa and Mastercard. Credit card deposits carry a ~2.5% acquirer surcharge (standard for card payments). Apple Pay and Google Pay run on the same card rails — same surcharge.

How do withdrawals work?

Identical methods in reverse. SEPA withdrawal: T+1 (standard) or under 10 seconds (SEPA Instant). Klarna withdrawals process via bank-account refund. USDC withdrawal to external wallet: Polygon gas cost (typically $0.01).

Are payment details protected?

Yes. Card and bank details are never stored by Polymarket Klarna UK — they pass directly through PCI-DSS compliant payment service providers (Adyen, Stripe). Polymarket Klarna UK retains only transaction IDs and Klarna reference numbers for reconciliation.