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 穩定幣設計的一個優勢是供應透明度,這在即時內可審核(至少就區塊鏈上的數據而言)。然而,如果我們也考慮Circle 的財務報表和每月的驗證報告,我們可以開始建立Circle 的USDC 國庫模型及其運作方式,特別是它的獲利能力。 如果我們看一下貝萊德的Circle 儲備基金,我們會發現它列出了投資組合按投資資產到期日細分,所有到期日在2 個月以內的資產,以及65%的到期日在1-7 天之間的資產。這個估計是基於對隔夜逆回購和4 週期票據的恆定比例組合分配,分別為70%和30%。 投資組合的規模估計恰好是當前的USDC 供應量,這也許不能完全代表Circle 的國庫運營,尤其是贖回運營,但應該成比例且一致。然而,這應該構成這些投資預期日收益率的樸素估計,因為它忽略了交易成本、展期成本和管理費用,這些費用在管理這個投資組合中會發生。 根據FRED 的數據,我們可以估計這些證券將產生的收益,使用有效聯邦基金利率估計隔夜逆回購投資的收益,使用4 週期國債利率估計這些資產其餘部分的收益,分別為70%和30%。  
 如上圖所示,每日報酬率與利率高度相關。儘管USDC 供應量在2022 年初達到峰值,但估計的每日收入實際上在2023 年初達到高峰——供應量減少近70 億美元之後。即使今天,供應量比今年稍早的水平低180 億美元,利息收入仍遠高於2021 年的水平,當時USDC 供應量與目前水準相當。這很好地說明了法定貨幣抵押穩定幣的商業模式,顯示利率敏感度越來越成為驅動其獲利能力的決定性因素。  
 使用上圖的季度數據,我們可以將這些數據與Circle 在財報中揭露的儲備利息收入進行比較。我們可以看到,他們報告稱2022 年第三季的利息收入為2.74 億美元,與我們估計的2.4 億美元相似——但是,當我們考慮到當前年度的所有數據和贖回時,這個簡單的模型似乎無法奏效。2022 年後沒有公開的財務報表阻礙了我們的模型驗證。儘管如此,值得注意的是,Circle 據報告稱,僅在今年上半年的營收(考慮到Circle 的所有業務)就比去年整年還要高,分別為7.79 億美元對比7.72 億美元。 即使在Paypal 穩定幣的新聞刺激下,人們對穩定幣的興趣日益濃厚,推動穩定幣採用的結構性因素正在發生變化,最重要的因素就是利率上升。持有現金的機會成本不斷增加可能會推動穩定幣用戶向貨幣市場基金等收益性投資轉移,後者提供超過5%的實質回報,而過去幾年的年化收益率不到2%。此外,收益穩定幣開始獲得採用,例如sDAI 和sFRAX,Coinbase 也正在提供USDC 5%的收益。  
# U) b  _3 J, t |   
 
 
 
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