The Tariff Agreement Puzzle: Why Polymarket Traders Doubt a US-China Deal Before Summer

As of 7 May 2026, prediction market participants placed the likelihood of a US-China tariff agreement by the end of the month at approximately 10% — a figure that has remained stubbornly low despite periodic diplomatic contact between the two governments, according to Polymarket data tracked by Unusual Whales.

That number deserves attention not as a prophecy but as a sentiment indicator. Prediction markets aggregate information from traders willing to put capital behind their convictions. When roughly nine in ten chance is assigned to no deal, the market is signalling something more durable than a negotiating pause: it is pricing in structural friction that neither side has moved to resolve.

The Diplomatic Record So Far

US-China trade relations have passed through several phases since the escalating tariff war that began in 2018. Both sides have at various points paused, rolled back, or suspended duties in exchange for commitments that proved difficult to verify or sustain. The pattern has been consistent: high-profile agreements followed by implementation gaps, renewed friction, and retaliatory cycles that damage commercial certainty on both sides.

Beijing's position has remained relatively consistent across administrations and negotiating teams. Chinese officials have consistently argued that tariff escalation serves neither country's economic interests and have called for dialogue grounded in mutual respect for sovereignty and developmental space. The Global Times, a state-affiliated Chinese publication, has characterised US tariff policy as "coercive diplomacy" designed to extract concessions rather than achieve genuine balance.

On the US side, the stated objectives have centred on correcting trade imbalances, protecting domestic industries identified as strategically sensitive, and creating leverage for structural commitments on industrial subsidies, market access, and intellectual property. The gap between those objectives and what Beijing considers negotiable has proved wider than early optimists anticipated.

Why the Market Doubt Is Warranted

The structural factors behind market scepticism are not difficult to identify. China has demonstrated a consistent preference for patience over capitulation in trade disputes — a stance reinforced by domestic political logic that makes concessions under external pressure politically costly. The US, meanwhile, has shown willingness to escalate further when earlier tariff rounds fail to produce visible results.

Supply chain realities have also shifted since 2018. Many US importers began diversifying sourcing away from China after the initial tariff rounds, reducing the immediate economic pressure that might have incentivised a deal. The remaining trade flow is more concentrated in sectors — semiconductors, advanced manufacturing, clean energy components — where both governments view decoupling as a strategic imperative rather than a commercial inconvenience.

Chinese analysts have argued that tariff tools are increasingly blunt instruments for achieving nuanced industrial policy goals. They note that US reliance on Chinese-manufactured components in sectors like solar panels and electric vehicle batteries has proved resistant to policy-driven reorientation. This creates a situation where both sides have reasons to maintain pressure and reasons to resist the kind of comprehensive agreement that markets might price more generously.

The Structural Context

What the Polymarket odds ultimately measure is not the technical probability of a deal but the market's read on each side's incentives and constraints. Trade agreements require both parties to declare victory in ways that satisfy domestic political audiences — a condition that has repeatedly proven difficult to meet.

The deeper dynamic involves competing industrial policy visions. Washington has invested heavily in reshoring and allieshoring initiatives, subsidising domestic semiconductor production and clean energy manufacturing. Beijing has accelerated its own industrial self-sufficiency programmes in response to external pressure. Both governments have signalled that some degree of economic separation is acceptable — even desirable — which narrows the negotiating space for comprehensive agreements.

That does not mean talks will not resume or that limited accommodations are impossible. It does suggest that the kind of broad tariff rollback that might constitute a definitive "deal" remains outside the range of outcomes either side appears willing to offer at present.

What Could Change the Odds

For the market probability to shift materially before May 31, traders would need to see credible signals that either side is preparing to cross a threshold — a significant rollback, a high-profile summit with verifiable commitments, or an economic shock that makes sustained confrontation politically untenable.

Geopolitical pressures could reshape incentives. Tensions elsewhere — in the Middle East, Eastern Europe, or the Korean Peninsula — sometimes generate unexpected momentum in bilateral trade talks as both governments seek to stabilise broader relationships. There is also the possibility that domestic economic pressure in either capital creates space for face-saving compromises that negotiators present as victories.

Absent such triggers, the current odds reflect a market that has learned to discount diplomatic optimism. The base rate for US-China tariff agreements, measured across multiple negotiating cycles, has been low. Until the structural conditions change, that seems unlikely to shift.

This publication covered the Polymarket odds as a primary data point for this article rather than treating them as a definitive forecast. The odds reflect trader sentiment on a specific date and will shift as conditions evolve.