預測市場平台 Polymarket 宣布自 3 月 30 日起，將交易費用擴展至幾乎所有市場類別，此前僅針對加密貨幣與體育賽事合約收費。新費率結構中，加密貨幣市場承擔最高費率，中間值由 1.56% 升至 1.8%；體育博彩費率最低，為 0.75%。
新費率結構：各市場類別差異一覽
（來源：Polymarket）
Polymarket 採用基於機率的浮動收費模式，費率並非固定佣金，而是隨事件發生機率動態調整。當事件勝率接近 50% 時，費率達到峰值；隨著結果趨於確定，費率則逐步接近零。
此次費率調整，各類別峰值費率如下：
加密貨幣市場：中間值由 1.56% 升至 1.8%，為所有類別最高費率
體育博彩市場：由 0.44% 升至 0.75%，為所有類別最低費率
政治、金融、經濟、科技、文化、天氣等類別：預計落在 1% 至 1.56% 之間，此前上述類別均未收取交易費
以體育類為例，一筆 50 美元、勝率 50% 的交易，手續費由原先的 0.22 美元升至 0.38 美元。加密貨幣類別在相同條件下的費用增幅更為顯著，直接壓縮頻繁交易者的實際收益空間。
推薦計劃與市場誠信新規同步推出
推薦計劃架構
Polymarket 同步推出針對高交易量用戶的推薦計劃，申請門檻為歷史交易量達 10,000 美元以上。推薦人可獲得直接推薦用戶在完成註冊後 180 天內產生佣金的 30%，以及間接推薦用戶佣金的 10%。獎勵無上限，每日午夜（UTC）自動發放。
市場誠信規則更新
Polymarket 亦同步更新了國際平台與美國商品期貨交易委員會（CFTC）監管平台的市場誠信規則，新規明確禁止三類行為：使用竊取的機密資訊進行交易、利用非法內線消息建立倉位，以及能夠直接影響事件結果的相關人員參與對應市場交易。用戶可透過新設立的市場誠信頁面提交可疑活動舉報。
上述綜合調整顯示， Polymarket 正逐步向受監管的金融交易平台模式靠攏，與當前預測市場受到交易者與監管機構高度關注的整體趨勢一致。
常見問題
Polymarket 的費率是固定的嗎？
不是。Polymarket 採用基於機率的浮動費率模式，費率隨事件勝率動態調整，在 50% 機率時達到峰值，隨著結果趨於確定，費率逐漸降低至接近零。
為何加密貨幣市場費率高於其他類別？
Polymarket 未公開差異定價的具體依據。從費率結構觀察，加密貨幣市場中間費率（1.8%）明顯高於體育博彩（0.75%），可能與加密類市場的流動性特徵或交易頻率有關。
Polymarket 的美國平台受哪個機構監管？
Polymarket 在美國的預測市場受美國商品期貨交易委員會（CFTC）監管，此次市場誠信規則更新同時適用於其國際平台與 CFTC 監管的美國平台。
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