Traders on prediction market platforms Polymarket and Myriad have lifted the implied probability of a Federal Reserve rate increase at this week’s Federal Open Market Committee meeting to 27%, with odds rising by double digits over the past 24 hours.

The move points to increased concern among market participants that the Fed may not have finished tightening monetary policy, even as traditional economist surveys broadly continue to expect policymakers to leave rates unchanged.

The FOMC is scheduled to meet on July 28-29, 2026. The federal funds rate is currently in a target range of 3.5% to 3.75%. A 25 basis point increase would raise the upper bound of that range to 4%. The rate is the Fed’s main short-term policy benchmark, making even a quarter-point change relevant for dollar funding conditions, Treasury yields, and risk appetite across global markets.

Prediction markets show renewed uncertainty

Earlier in the week, CME FedWatch showed the probability of a 25 basis point hike rising as high as 46.5% before later moderating. The size of that intraday move suggested a meaningful shift in expectations rather than routine market noise.

Rising oil prices and persistent inflation concerns appear to be the main factors prompting traders to reassess assumptions about the Fed’s next policy decision. Prediction market pricing can also differ from economist surveys because it reflects tradable odds set by participants, while survey results capture stated expectations from forecasters.

Polymarket remains the leading event-based trading platform. Myriad operates as a decentralized prediction market on BNB Chain and uses Chainlink oracles for settlement. The platform has processed more than $150 million in on-chain volume.

Crypto markets and macro policy remain linked

Higher interest rates typically support the US dollar, raise the opportunity cost of holding non-yielding assets, and reduce liquidity available to speculative markets. During past tightening cycles, Bitcoin and altcoins have often moved inversely to perceived rate hike probabilities.

The current shift is notable because the prediction markets reflecting the change are themselves part of crypto-native infrastructure. Polymarket runs on Polygon, while Myriad operates on BNB Chain.

Market participants track on-chain signals

The 27% implied probability remains below the base case reflected in most traditional economist surveys, which still point to no rate change at the July meeting. CME FedWatch odds also moved lower after the earlier spike.

For crypto-focused portfolios, a Fed hike could trigger a rapid downside reaction in Bitcoin and Ethereum because relatively few participants appear positioned for that outcome.

Traditional finance participants increasingly monitor platforms such as Polymarket alongside CME FedWatch and Bloomberg terminal surveys. That has created an environment in which on-chain betting activity can become a market signal as traders in traditional finance adjust positions based on data from blockchain-based platforms. Market participants will also parse the post-meeting statement and any guidance from policymakers for clues on whether inflation risks are changing the path of rates beyond the July decision.