US Dollar / Japanese Yen (USD/JPY) Up or Down on September 21? Odds & Prediction Markets

Name: US Dollar / Japanese Yen (USD/JPY) Up or Down on September 21?
Start: 2026-09-18T12:01:27.000Z
End: 2026-09-21T21:00:00.000Z

Description

This market will resolve to "Up" if the reference price for US Dollar / Japanese Yen (USD/JPY) on September 21, 2026 is higher than the reference price for the most recent prior reference day. This market will resolve to "Down" if it is lower. If the two reference prices are exactly equal, this market will resolve 50-50. For each day, the reference price is the "Close" value of the Pyth 1-minute candle timestamped 4:59 PM ET (covering 4:59:00–4:59:59 PM ET) on that date. Reference prices will be used exactly as published by Pyth, without rounding. A "reference day" is any day on which the applicable trading session for US Dollar / Japanese Yen (USD/JPY), per the trading-hours schedule listed on Pyth, includes 4:59 PM ET. E.g., ordinarily, a market on Monday would refer to the previous Friday for its reference price, since weekend sessions (where applicable) do not include a 4:59 PM ET close; if that Friday were a market holiday, it would refer to the next most recent prior reference day. All times are Eastern Time, and each day refers to the Eastern Time calendar date. If no valid Pyth Close value exists for the 4:59 PM ET 1-minute candle on any day for which a reference price is being determined — including September 21, 2026 itself, such as on a day with shortened trading hours — the last valid Pyth price published prior to 5:00 PM ET on that date will be used as that day's reference price. If no valid Pyth price is published at all on the prior reference day — due to a system outage, data failure, or other technical disruption — the next most recent prior reference day on which a valid Pyth price was published will be used in its place. If no valid Pyth price is published at all on September 21, 2026, or if September 21, 2026 is not a trading day under the applicable trading-hours schedule as listed on Pyth, this market will resolve 50-50. The resolution source for this market is Pyth, specifically the "Close" value of the relevant 1-minute candle for US Dollar / Japanese Yen (USD/JPY) available at https://pythdata.app/explore/FX.USD%2FJPY. Historical 1-minute candles may be accessed by appending a Unix timestamp (seconds) to the Pyth chart URL using the "t=" parameter.

Polymarket

This market will resolve to "Up" if the reference price for US Dollar / Japanese Yen (USD/JPY) on September 21, 2026 is higher than the reference price for the most recent prior reference day. This market will resolve to "Down" if it is lower. If the two reference prices are exactly equal, this market will resolve 50-50. For each day, the reference price is the "Close" value of the Pyth 1-minute candle timestamped 4:59 PM ET (covering 4:59:00–4:59:59 PM ET) on that date. Reference prices will be used exactly as published by Pyth, without rounding. A "reference day" is any day on which the applicable trading session for US Dollar / Japanese Yen (USD/JPY), per the trading-hours schedule listed on Pyth, includes 4:59 PM ET. E.g., ordinarily, a market on Monday would refer to the previous Friday for its reference price, since weekend sessions (where applicable) do not include a 4:59 PM ET close; if that Friday were a market holiday, it would refer to the next most recent prior reference day. All times are Eastern Time, and each day refers to the Eastern Time calendar date. If no valid Pyth Close value exists for the 4:59 PM ET 1-minute candle on any day for which a reference price is being determined — including September 21, 2026 itself, such as on a day with shortened trading hours — the last valid Pyth price published prior to 5:00 PM ET on that date will be used as that day's reference price. If no valid Pyth price is published at all on the prior reference day — due to a system outage, data failure, or other technical disruption — the next most recent prior reference day on which a valid Pyth price was published will be used in its place. If no valid Pyth price is published at all on September 21, 2026, or if September 21, 2026 is not a trading day under the applicable trading-hours schedule as listed on Pyth, this market will resolve 50-50. The resolution source for this market is Pyth, specifically the "Close" value of the relevant 1-minute candle for US Dollar / Japanese Yen (USD/JPY) available at https://pythdata.app/explore/FX.USD%2FJPY. Historical 1-minute candles may be accessed by appending a Unix timestamp (seconds) to the Pyth chart URL using the "t=" parameter.

Frequently asked questions

On Polymarket, the dashboard for the USD/JPY exchange rate tracks the current implied probability of the exchange rate being higher or lower on Sep 21, 2026. You'll find the odds reflecting trader sentiment, a price history chart showing how the market has fluctuated, and the 24-hour trading volume, currently at $5. The total volume traded on this market is $5. This provides a real-time view of where traders stand on the future direction of this key currency pair.

Currently, prediction market participants are strongly indicating a specific direction for the USD/JPY exchange rate. It’s interesting to compare this to forecasts from financial analysts, who often publish their own predictions on currency movements. However, it's important to remember that analyst forecasts represent individual opinions or institutional views, while this market reflects a collective judgment of many traders. Discrepancies can arise due to differing methodologies, information access, or simply varying risk appetites.

This market resolves around Sep 21, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The resolution will be based on the official closing exchange rate for the USD/JPY pair on that date. The market will determine whether the exchange rate was higher or lower at the close of business on Sep 21, 2026, and shares will pay out accordingly to those who correctly predicted the direction. Traders should monitor the relevant financial news sources as the resolution date approaches.

Several factors could significantly influence the USD/JPY exchange rate and, consequently, this market. Major economic data releases from both the United States and Japan, such as inflation reports, employment figures, and GDP growth data, are key catalysts. Unexpected policy announcements from the Federal Reserve or the Bank of Japan regarding interest rates or monetary policy could also trigger substantial movements. Geopolitical events and shifts in global risk sentiment can also impact currency valuations, potentially leading to shifts in trading activity in this market.

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