"スパイは10月19日にオープンしますか、それともダウンしますか?" is a 日次 prediction market on Polymarket where traders buy and sell shares on whether SPY's opening price on October 19 will be higher ("Up") or lower ("Down") than its closing price on the most recent prior trading day. The current market probability is 100% for "上昇." A price of 100% means the market collectively assigns a 100% chance to that outcome. Prices update in real-time as traders react to live SPY price movements. Shares in the correct outcome are redeemable for $1 each upon market resolution.
To trade on "スパイは10月19日にオープンしますか、それともダウンしますか?," decide whether you believe SPY's opening price on October 19 will be higher ("Up") or lower ("Down") than its closing price on the most recent prior trading day. Buy "Up" if you think it will open higher, or "Down" if you think it will open lower. Enter your amount and click "Trade." If your chosen outcome is correct at resolution, each share pays out $1.00. If incorrect, shares are worth $0.
The "スパイは10月19日にオープンしますか、それともダウンしますか?" market resolves by comparing SPY's opening price on October 19 with its closing price on the most recent prior trading day, using Pyth 1-minute candle prices. If the October 19 open is higher, the outcome is "Up"; if lower, "Down"; if equal, the market resolves 50-50. You can review the complete resolution criteria and data source in the "Rules" section on this page.
Yes. You don't need to trade to stay informed. Each "スパイは10月19日にオープンしますか、それともダウンしますか?" page shows real-time Up/Down probabilities reflecting trader sentiment on whether SPY will open higher or lower on October 19 than its close on the most recent prior trading day. Use the date navigation features at the top of the page to browse past and upcoming daily windows. You can also view the Order Book and Activity tab for a real-time feed of trade flow.
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