預測市場平台 Polymarket 近期更新官網交易文件,顯示其「15 分鐘加密貨幣漲跌市場」已正式向吃單方 (Taker) 收取交易費,代表 Polymarket 長期主打的零交易費用機制出現變化,但僅限於特定的短線加密市場,其餘多數市場仍維持免手續費設計。
Polymarket 低調更新,15 分鐘加密市場率先收費
根據 Polymarket 最新說明文件,平台已在「15 分鐘加密貨幣上/下漲市場」正式收取交易手續費,且僅針對吃單方收費。 文件內容顯示,這項制度並非全面適用,而是限定於交易頻率高、週期極短的加密貨幣市場,其餘多數市場仍維持原有的免手續費設計。
費用用途明確,讓吃單費全數回饋流動性
官方說明,向吃單方收取的交易費用,並不會由平台留作營收,而是每天以 USDC 發放給市場中的流動性提供者,也就是掛單方 (Maker)。
Polymarket 強調,這套機制的核心目的,在於建立穩定的流動性補貼來源,用以支撐市場報價與深度,而非建立平台層級的抽成或稅負。
費率隨機率變化,五五波區間成本最高
在費率結構上,官方文件指出,交易費將依市場機率動態調整。當市場機率接近 50% 時,費率達到最高;隨著機率向 0% 或 100% 移動,費率則快速下降,甚至趨近於零。
以文件提供的範例計算,若交易者以每股 0.50 美元價格買入 100 股合約,需支付約 1.56 美元的交易費,約占該筆交易價值的 3% 多一點,為整體費率曲線的高點。
圖為 Polymarket 官方文件說明的費率機制 社群反應聚焦結構,解讀為市場機制調整
儘管 Polymarket 未對外發布正式公告,這項變動仍迅速在社群平台引發討論。部分市場參與者指出,這次調整更像是市場結構的修正,而非單純的費用調漲。
也有用戶認為,透過吃單費回饋掛單方,有助於降低洗單行為,並削弱高頻交易機器人過去在零費用環境中反覆刷單的誘因。
實際影響有限,短線市場先行測試
從影響範圍來看,這項制度調整僅適用於 15 分鐘加密貨幣漲跌市場,並未涵蓋政治預測、長期事件型合約,或其他非加密貨幣相關市場,多數用戶常交易的市場仍維持免手續費。
此外,即便是在已收費的市場中,小額交易會進行四捨五入處理,實際費用相對有限;當交易屬於明顯單邊押注、機率接近極端值時,費率亦會顯著下降。至於該機制是否擴大適用,官方目前尚未進一步說明。
(一文搞懂 Polymarket:何謂鏡像訂單簿?為何 YES + NO 必須等於 1?)
這篇文章 Polymarket 調整交易機制,15 分鐘加密市場開收吃單費 最早出現於 鏈新聞 ABMedia。
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