S&P 500 (SPX) Up or Down on August 10?

Platform comparison

Market context

The S&P 500 will either close higher or lower on Monday, 10 August 2026 relative to Friday's close. The 24% crowd probability assigned to an up day reflects modest bearish lean, suggesting traders expect consolidation or a pullback after the prior week's moves. August historically presents thin liquidity conditions as institutional traders reduce exposure during summer holidays, which typically amplifies intraday volatility and can skew closing prices toward technical levels rather than fundamental shifts.

Daily directional bets on the S&P 500 have drawn consistent deposit activity through SEPA transfers and Klarna's buy-now-pay-later rails, particularly from European traders seeking exposure without committing large sums upfront. The book depth on directional SPX markets correlates directly with payment friction; lower withdrawal fees and faster USDC settlement have historically increased participation in these short-dated contracts. Traders depositing via Klarna report higher repeat activity on single-day equity index markets, suggesting the on-ramp accessibility drives both initial entry and sustained engagement.

Key catalysts entering the settlement window include any Fed speakers scheduled for the preceding week, jobless claims data due Thursday 8 August, and earnings announcements from mega-cap constituents. The 10 August date falls immediately after the traditional summer lull, when portfolio rebalancing and options expiry mechanics can create directional pressure. Traders should monitor overnight futures action and Asian market closes on 10 August morning, as these often telegraph institutional positioning ahead of the US open.

Methodology

This page compares S&P 500 (SPX) Up or Down on August 10? 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).

UK Frequently Asked Questions

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 UK traders use Klarna to deposit on Polymarket?

Polymarket does not natively accept Klarna. To fund a Polymarket account from the UK, you must first purchase USDC via a crypto exchange (Coinbase UK, Kraken) or Revolut, then transfer to a Polygon-compatible wallet. Some third-party on-ramps (MoonPay, Transak) accept UK debit cards and may support Klarna buy-now-pay-later for crypto purchases.

What payment methods can UK users use for Polymarket?

UK traders typically use: (1) Coinbase UK or Kraken — buy USDC with GBP debit card or bank transfer; (2) Revolut — buy crypto and send to wallet; (3) MoonPay or Transak — Visa/Mastercard UK debit card directly to USDC on Polygon. Standard GBP-to-USDC conversion fees range from 0.5–2.5%.

How long do Polymarket withdrawals take for UK users?

Polymarket withdrawals to your Polygon wallet are instant (on-chain). Converting USDC back to GBP via Coinbase UK or Kraken typically takes 1–3 business days for bank transfer, or near-instant for Revolut. Polygon gas fees are minimal (<$0.01 per transaction).