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諾獎(jiǎng)得主:硅谷銀行崩潰前就已死亡

Shawn Tully
2023-03-18

道格拉斯·戴蒙德在采訪中表示,雖然美聯(lián)儲(chǔ)的政策產(chǎn)生了影響,但這并非危機(jī)爆發(fā)的主要原因。

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2022年10月10日,美國(guó)伊利諾伊州芝加哥,諾貝爾經(jīng)濟(jì)學(xué)獎(jiǎng)得主道格拉斯·戴蒙德在家中門(mén)廊拍攝肖像照。圖片來(lái)源:JIM VONDRUSKA—REUTERS

多數(shù)人對(duì)于硅谷銀行(Silicon Valley Bank)的突然倒閉感到震驚和困惑。作為美國(guó)第16大貸款機(jī)構(gòu),硅谷銀行最近還能夠像它所服務(wù)的科技初創(chuàng)公司一樣維持增長(zhǎng),為什么它的倒閉如此迅速和猛烈?

硅谷銀行的倒閉是其自身特有的糟糕經(jīng)營(yíng)策略的后果,還是因?yàn)槊缆?lián)儲(chǔ)的大幅加息政策?美聯(lián)儲(chǔ)加息導(dǎo)致許多銀行的投資貶值,令其他中等規(guī)模貸款機(jī)構(gòu)陷入危機(jī)。如果硅谷銀行因?yàn)楣芾聿簧贫归],為什么美聯(lián)儲(chǔ)和加州的銀行業(yè)監(jiān)管部門(mén)卻眼睜睜地看著它如同失控的列車(chē)一樣在軌道上左右搖擺,而沒(méi)有要求駕駛員在列車(chē)脫軌之前踩剎車(chē)?

有一名專(zhuān)家可以用直白的語(yǔ)言,來(lái)讓我們理解這件事情的本質(zhì)。他就是芝加哥大學(xué)布斯商學(xué)院的教授道格拉斯·戴蒙德(Douglas Diamond)。2022年,他和研究合作伙伴、華盛頓大學(xué)圣路易斯分校的菲利普·迪布維格(Philip Dybig)以及美聯(lián)儲(chǔ)的前主席本·伯南克(Ben Bernanke),共同獲得2022年的諾貝爾經(jīng)濟(jì)學(xué)獎(jiǎng)。

戴蒙德與迪布維格榮獲諾貝爾獎(jiǎng)的聯(lián)合研究認(rèn)為,銀行本身是脆弱的,容易受到“擠兌”沖擊,因?yàn)楫?dāng)客戶(hù)大量提款時(shí),貸款機(jī)構(gòu)可能不得不以低價(jià)出售本來(lái)應(yīng)該在到期后全額償付的債券或貸款。因此,毫無(wú)必要的恐慌情緒可能摧毀一家健康的銀行。

戴蒙德和迪布維格強(qiáng)調(diào),完善的監(jiān)管和審慎的管理能夠大大分散貸款和投資組合的風(fēng)險(xiǎn),再加上合理的客戶(hù)結(jié)構(gòu),這是提振客戶(hù)信心的關(guān)鍵,可以幫助美國(guó)的銀行擺脫危險(xiǎn)。

2022年10月,剛獲獎(jiǎng)不久的戴蒙德在接受《財(cái)富》雜志采訪時(shí)表示,美聯(lián)儲(chǔ)以殘酷的、史無(wú)前例的速度加息。很多公司和銀行曾經(jīng)相信,多年來(lái)保持凈零水平的通脹調(diào)整后的收益率會(huì)持續(xù)數(shù)年,而現(xiàn)在,這些公司和銀行正在遭受債券投資組合嚴(yán)重虧損。

我們針對(duì)硅谷銀行倒閉,對(duì)戴蒙德進(jìn)行了一個(gè)小時(shí)的采訪。戴蒙德在采訪中指出,雖然美聯(lián)儲(chǔ)的政策產(chǎn)生了影響,但這并非危機(jī)爆發(fā)的主要原因。硅谷銀行也沒(méi)有遭遇常見(jiàn)的“穩(wěn)健經(jīng)營(yíng)的銀行被擠兌毀掉”的情景。相反,硅谷銀行無(wú)論資產(chǎn)還是負(fù)債方面的政策都很糟糕。戴蒙德認(rèn)為,硅谷銀行能夠作為一個(gè)案例,用于研究在美聯(lián)儲(chǔ)大幅加息的背景下,為什么為支持危險(xiǎn)擴(kuò)張所執(zhí)行的不穩(wěn)定的結(jié)構(gòu)會(huì)帶來(lái)可怕的風(fēng)險(xiǎn),而謹(jǐn)慎經(jīng)營(yíng)的銀行卻可以避免風(fēng)險(xiǎn)。

銀行的運(yùn)行機(jī)制,以及硅谷銀行如何打破固有模式

戴蒙德介紹了銀行維持客戶(hù)信任和免受擠兌沖擊的標(biāo)準(zhǔn)方法。他解釋稱(chēng):“獲得諾貝爾委員會(huì)認(rèn)可的論文解釋了銀行應(yīng)該如何設(shè)置經(jīng)營(yíng)架構(gòu)。在資產(chǎn)方面,銀行向不同類(lèi)型的個(gè)人和企業(yè)客戶(hù)發(fā)放貸款。理想情況下,銀行通過(guò)多樣化配置能夠創(chuàng)建安全資產(chǎn),避免高風(fēng)險(xiǎn)資產(chǎn)。如果銀行擁有多樣化的資金來(lái)源,只要儲(chǔ)戶(hù)不在同一天需要取款,這種多樣化配置就使銀行可以有效利用其持有的現(xiàn)金和流動(dòng)資產(chǎn)。”

他表示,在負(fù)債方面,關(guān)鍵是銀行要服務(wù)廣泛的、各種各樣的儲(chǔ)戶(hù)。擁有大量零售客戶(hù)對(duì)銀行來(lái)說(shuō)是好事。當(dāng)國(guó)債利率上漲時(shí),零售客戶(hù)不太可能像企業(yè)客戶(hù)一樣,為獲得額外收益而取出所有儲(chǔ)蓄或清空貨幣市場(chǎng)賬戶(hù)。

戴蒙德指出,關(guān)鍵是要理解兩類(lèi)投資在硅谷銀行資產(chǎn)負(fù)債表中扮演的角色。

第一類(lèi)投資是可出售證券(Available for Sale),簡(jiǎn)稱(chēng)“AFS”。AFS包括銀行交易賬戶(hù)中能夠隨時(shí)出售的證券。所有AFS類(lèi)債券必須在每個(gè)季度末“按市值計(jì)價(jià)”。如果銀行在去年早些時(shí)候收益率極低時(shí)買(mǎi)入并持有美國(guó)國(guó)債,之后利率上浮,這些債券的價(jià)格大幅下跌,會(huì)影響銀行的資本狀況。

第二類(lèi)投資是持有至到期投資(Held to Maturity),簡(jiǎn)稱(chēng)HTM。該類(lèi)投資包括固定收益證券,銀行在資產(chǎn)負(fù)債表中持有這些證券,直至它們以票面價(jià)值被贖回為止。銀行可以每個(gè)季度一次在AFS和HTM類(lèi)別之間進(jìn)行切換。如果銀行需要補(bǔ)充資本,就能夠?qū)瘡拈L(zhǎng)期持有轉(zhuǎn)移到交易賬戶(hù)。但如果銀行轉(zhuǎn)讓產(chǎn)生未實(shí)現(xiàn)損失的HTM證券,這雖然會(huì)提高流動(dòng)性,卻會(huì)對(duì)銀行的賬面價(jià)值產(chǎn)生更大的影響。這就是硅谷銀行在破產(chǎn)前所面臨的困境。

2022年年底,硅谷銀行的AFS投資規(guī)模為260億美元,基本都是美股國(guó)債以及主要由房利美(Fannie Mae)和房地美(Freddie Mac)等政府贊助企業(yè)發(fā)行的“機(jī)構(gòu)”抵押貸款擔(dān)保證券。

戴蒙德指出,這些AFS債券均具有高流動(dòng)性;銀行可以輕松按照市場(chǎng)價(jià)格出售,并且如果銀行快速拋售債券,就能夠避免減值風(fēng)險(xiǎn)。硅谷銀行的資產(chǎn)負(fù)債表中還包括910億美元HTM債券,其中90%是機(jī)構(gòu)發(fā)行抵押貸款擔(dān)保證券,這些債券同樣從活躍興旺的市場(chǎng)中受益匪淺。硅谷銀行的740億美元信貸組合高度集中,主要是向科技初創(chuàng)公司及其創(chuàng)始人和管理者發(fā)放的貸款。這些公司和硅谷名人也是他們的主要儲(chǔ)戶(hù)。事實(shí)上,據(jù)媒體報(bào)道,硅谷銀行經(jīng)常在其貸款協(xié)議中要求借款人將存款存在該銀行。

硅谷銀行的投資與用來(lái)投資的存款不匹配

截至3月中旬,硅谷銀行在緊急情況下需要出售的AFS債券,收益率只有1.79%。顯然,該銀行在2022年春利率開(kāi)始大幅上調(diào)之前買(mǎi)入了大多數(shù)證券。AFS投資組合的平均期限長(zhǎng)達(dá)3.6年。2022年年底,約90%的HTM貸款期限超過(guò)10年,而這些基礎(chǔ)投資組合的回報(bào)率只有1.63%。顯然,硅谷銀行早在利率大幅上調(diào)之前買(mǎi)入了大部分HTM債券。在扣除信貸損失撥備后,硅谷銀行的貸款組合回報(bào)率遠(yuǎn)低于4%。

戴蒙德表示:“硅谷銀行的投資都是長(zhǎng)期投資,收益率極低。他們肯定認(rèn)為,只要儲(chǔ)戶(hù)一直將資金存在該銀行,就會(huì)一切正常,而且他們一直接受支票賬戶(hù)零利率和貨幣市場(chǎng)基金低于-1%的利率。在這種情況下,他們就可以持有債券直至到期,并獲得債券的全部?jī)r(jià)值。” 例如,硅谷銀行希望五年期國(guó)債比一年期國(guó)債額外獲得0.5%的收益率。

顯然,這種“脫離收益率曲線”的策略是錯(cuò)誤的。2022年,危機(jī)來(lái)臨。與一年前購(gòu)買(mǎi)的國(guó)債相比,這一年,五年期國(guó)債收益率從年初的低于1%,到秋天提高到4.5%左右。突然之間,硅谷銀行不得不為其儲(chǔ)蓄賬戶(hù)支付4.5%的利息,這是其一年前提供的利息。

在2022年中期之前,硅谷銀行的存款基礎(chǔ)似乎非常穩(wěn)定。不僅新客戶(hù)快速增長(zhǎng),而且其現(xiàn)有客戶(hù)繼續(xù)將資金存在該銀行。但當(dāng)利率大幅上漲時(shí),為了追求國(guó)債的高收益率,儲(chǔ)戶(hù)選擇提取存在硅谷銀行支票和貨幣市場(chǎng)的數(shù)十億美元存款。2022年,硅谷銀行的存款減少8%,今年1月和2月,儲(chǔ)戶(hù)流失速度加快。

3月8日,硅谷銀行發(fā)布一份8K文件稱(chēng),該銀行已經(jīng)出售了全部AFS債券,用于募集資金和向提款的客戶(hù)支付存款,并試圖通過(guò)發(fā)行價(jià)值12.5億美元的股票補(bǔ)充資金。出售AFS債券募集的款項(xiàng)為210億美元,導(dǎo)致該銀行稅前損失約24億美元,虧損幅度為11%。

戴蒙德認(rèn)為,硅谷銀行存在兩個(gè)咎由自取的根本問(wèn)題。首先是債券貶值。其債券的期限比存款基礎(chǔ)的期限更長(zhǎng),而且與摩根大通或美國(guó)銀行的存款相比,硅谷銀行的存款基礎(chǔ)并不穩(wěn)定。戴蒙德說(shuō):“利率上漲對(duì)其債券造成了沖擊,削減了該銀行的資本。他們不得不減記AFS債券,無(wú)論通過(guò)出售或其他方式。銀行管理層聲稱(chēng)減價(jià)出售這些債券,但事實(shí)并非如此。這些債券具有高流動(dòng)性。硅谷銀行緊急出售這些債券并沒(méi)有任何折扣。”因此,他表示,硅谷銀行的情況并不像傳統(tǒng)的災(zāi)難情境,即存款流失迫使銀行以極低的價(jià)格拋售難以出售的資產(chǎn)。

戴蒙德指出,早在硅谷銀行的8K文件引發(fā)擠兌之前,它就已經(jīng)瀕臨資不抵債,即將破產(chǎn)。他說(shuō)道:“隨著該銀行的‘募資’成本,即需要支付的存款利息,持續(xù)上漲至4%甚至更高,銀行為了留住客戶(hù),不得不支付更高利息。但作為銀行收入來(lái)源的債券組合,回報(bào)率卻低于2%。簡(jiǎn)而言之,資產(chǎn)產(chǎn)生的收益低于2%,但需要支付的負(fù)債卻達(dá)到5%。”收入和支出的利息赤字,意味著硅谷銀行注定要承受巨額營(yíng)業(yè)損失。

為了彌補(bǔ)損失,硅谷銀行需要將期限更長(zhǎng)的HTM證券轉(zhuǎn)移到交易賬戶(hù),以募集現(xiàn)金。而這樣做只會(huì)對(duì)其資本狀況造成更大影響。在8K文件的腳注中,硅谷銀行指出,如果將HTM證券按市值計(jì)價(jià),價(jià)格調(diào)整就會(huì)徹底清空其賬面資本。戴蒙德稱(chēng):“低利率的長(zhǎng)期債券向下調(diào)整幅度,甚至?xí)^(guò)AFS類(lèi)三年至五年期債券。”即使硅谷銀行能夠持有HTM組合至期滿(mǎn),營(yíng)業(yè)損失最終也會(huì)導(dǎo)致該銀行無(wú)力償債。戴蒙德表示:“這家銀行似乎在崩潰之前就已經(jīng)死亡或?yàn)l臨死亡。”

令戴蒙德震驚的另外一點(diǎn)是,雖然硅谷銀行特別容易因?yàn)槔噬蠞q受到?jīng)_擊,但面對(duì)債券收益率最終會(huì)從歷史低點(diǎn)上漲這一顯而易見(jiàn)的風(fēng)險(xiǎn),它幾乎沒(méi)有采取任何抵消措施。在摩根大通等經(jīng)營(yíng)狀況良好的機(jī)構(gòu),普遍會(huì)進(jìn)行利率對(duì)沖。

硅谷銀行未能實(shí)現(xiàn)存款基礎(chǔ)多樣化,增加了擠兌風(fēng)險(xiǎn)

戴蒙德認(rèn)為,硅谷銀行不僅未能將投資期限與儲(chǔ)戶(hù)瞬息萬(wàn)變的需求相匹配,還違反了銀行穩(wěn)健經(jīng)營(yíng)的第二條鐵律:吸引多樣化的客戶(hù)。他指出,在硅谷銀行,用于平衡硅谷初創(chuàng)公司及其富有的創(chuàng)始人的零售客戶(hù),所占的比例極小。

明尼蘇達(dá)大學(xué)(University of Minnesota)會(huì)計(jì)學(xué)教授薇薇安·方說(shuō):“有媒體報(bào)道,硅谷銀行會(huì)尋找那些計(jì)劃進(jìn)行新一輪風(fēng)投融資的公司,為他們提供大額貸款。這是該銀行業(yè)務(wù)飛速增長(zhǎng)的原因。”戴蒙德表示:“切記,資金流出長(zhǎng)達(dá)六個(gè)月。這些流失的客戶(hù)既不是程序員,也不是老師。他們都是公司的首席財(cái)務(wù)官。他們的存款幾乎都是大額存款。”而首席財(cái)務(wù)官們比普通客戶(hù),更快從支票賬戶(hù)中提款,以追求國(guó)債的高收益。

一天內(nèi)被提取的存款高達(dá)驚人的480億美元。戴蒙德驚嘆道:”這是史上規(guī)模最快的銀行擠兌。硅谷社區(qū)的客戶(hù)口口相傳。當(dāng)彼得·蒂爾和初創(chuàng)公司孵化機(jī)構(gòu)Y-Combinator建議人們趕緊取錢(qián)的時(shí)候,就會(huì)迅速發(fā)生擠兌,并且一發(fā)不可收拾。”

面對(duì)危機(jī)蔓延,戴蒙德?lián)膶捤傻谋O(jiān)管和美聯(lián)儲(chǔ)超級(jí)粗暴的政策

當(dāng)然,大多數(shù)中等規(guī)模銀行并不存在導(dǎo)致硅谷銀行倒閉的資金錯(cuò)配風(fēng)險(xiǎn),以及押注單一類(lèi)別客戶(hù)的經(jīng)營(yíng)策略。戴蒙德依舊擔(dān)心,美聯(lián)儲(chǔ)對(duì)區(qū)域銀行的監(jiān)管過(guò)于寬松,不足以避免未來(lái)的危機(jī)。

2010年《多德-弗蘭克法案》(Dodd-Frank Act)通過(guò)之后的幾年間,美聯(lián)儲(chǔ)對(duì)中等規(guī)模貸款機(jī)構(gòu)與富國(guó)銀行或花旗集團(tuán)等一視同仁,執(zhí)行嚴(yán)格的年度壓力測(cè)試。但在2018年,美國(guó)前總統(tǒng)唐納德·特朗普的政府成功通過(guò)了一項(xiàng)放松監(jiān)管法案,大幅減少了對(duì)區(qū)域銀行進(jìn)行壓力測(cè)試的頻率和嚴(yán)格程度。

“我從最新的壓力測(cè)試中發(fā)現(xiàn),美聯(lián)儲(chǔ)評(píng)估了銀行在利率從0%到2%的表現(xiàn),它似乎認(rèn)為利率不會(huì)超過(guò)2%。因此,幾乎所有銀行都通過(guò)了測(cè)試。但測(cè)試的標(biāo)準(zhǔn)區(qū)間應(yīng)該是0%至7%。”(硅谷銀行被免于參加2021年的最新壓力測(cè)試,因?yàn)槠滟Y產(chǎn)規(guī)模依舊低于規(guī)定水平。2022年,雖然其資產(chǎn)規(guī)模超過(guò)了規(guī)定水平,但硅谷銀行仍然未被安排測(cè)試。)

戴蒙德感到意外的是,硅谷銀行客戶(hù)的單一結(jié)構(gòu)和不安情緒,以及該銀行持有低收益長(zhǎng)期債券的策略等警告信號(hào),卻沒(méi)有引起美聯(lián)儲(chǔ)和加利福尼亞州金融保護(hù)與創(chuàng)新部(California Department of Financial Protection and Innovation)的重視。

顯然,美聯(lián)儲(chǔ)未來(lái)需要假設(shè)更高利率水平,預(yù)測(cè)中等規(guī)模銀行的未來(lái)前景,而這種調(diào)整將要求貸款機(jī)構(gòu)持有更多資本。由于對(duì)AFS證券按市值計(jì)價(jià)已經(jīng)導(dǎo)致銀行股價(jià)下跌,可以想象,區(qū)域性銀行將不得不通過(guò)發(fā)行股票來(lái)恢復(fù)資本規(guī)模。反過(guò)來(lái),銀行宣布需要出售股份,可能引發(fā)儲(chǔ)戶(hù)退出。

當(dāng)然,正是美聯(lián)儲(chǔ)超級(jí)粗暴的政策,令銀行陷入這種困難境地。戴蒙德表示:“隨著美聯(lián)儲(chǔ)在一年內(nèi)將利率從1%提高到5%,它所產(chǎn)生的系統(tǒng)性問(wèn)題不足為奇。在榮獲諾貝爾獎(jiǎng)后的發(fā)言中,我主要討論了快速加息將如何對(duì)公司造成傷害。但過(guò)快加息也會(huì)給銀行造成嚴(yán)重傷害。”戴蒙德認(rèn)為,美聯(lián)儲(chǔ)需要“更緩慢、更慎重的”加息,以便于在類(lèi)似于硅谷銀行危機(jī)的情況沖擊整個(gè)銀行系統(tǒng)之前先發(fā)制人。

按照美國(guó)國(guó)家經(jīng)濟(jì)研究局的說(shuō)法,道格拉斯·戴蒙德榮獲諾貝爾獎(jiǎng)的原因是,他提供的“洞察為現(xiàn)代銀行業(yè)監(jiān)管奠定了基礎(chǔ)”。戴蒙德在研究中高度推崇完善的管理和監(jiān)管,他認(rèn)為這是保證銀行安全的關(guān)鍵。但他認(rèn)為在硅谷銀行危機(jī)中缺少了這兩點(diǎn)。

一旦銀行偏離戴蒙德的模式,就會(huì)陷入困境。我們只能希望硅谷銀行倒閉是個(gè)例,希望美聯(lián)儲(chǔ)殘酷的加息和疲軟的監(jiān)管,不會(huì)導(dǎo)致銀行業(yè)持續(xù)暴雷,在美國(guó)經(jīng)濟(jì)瀕臨衰退的時(shí)刻擾亂美國(guó)信用市場(chǎng)。(財(cái)富中文網(wǎng))

譯者:劉進(jìn)龍

審校:汪皓

2022年10月10日,美國(guó)伊利諾伊州芝加哥,諾貝爾經(jīng)濟(jì)學(xué)獎(jiǎng)得主道格拉斯·戴蒙德在家中門(mén)廊拍攝肖像照。

多數(shù)人對(duì)于硅谷銀行(Silicon Valley Bank)的突然倒閉感到震驚和困惑。作為美國(guó)第16大貸款機(jī)構(gòu),硅谷銀行最近還能夠像它所服務(wù)的科技初創(chuàng)公司一樣維持增長(zhǎng),為什么它的倒閉如此迅速和猛烈?

硅谷銀行的倒閉是其自身特有的糟糕經(jīng)營(yíng)策略的后果,還是因?yàn)槊缆?lián)儲(chǔ)的大幅加息政策?美聯(lián)儲(chǔ)加息導(dǎo)致許多銀行的投資貶值,令其他中等規(guī)模貸款機(jī)構(gòu)陷入危機(jī)。如果硅谷銀行因?yàn)楣芾聿簧贫归],為什么美聯(lián)儲(chǔ)和加州的銀行業(yè)監(jiān)管部門(mén)卻眼睜睜地看著它如同失控的列車(chē)一樣在軌道上左右搖擺,而沒(méi)有要求駕駛員在列車(chē)脫軌之前踩剎車(chē)?

有一名專(zhuān)家可以用直白的語(yǔ)言,來(lái)讓我們理解這件事情的本質(zhì)。他就是芝加哥大學(xué)布斯商學(xué)院的教授道格拉斯·戴蒙德(Douglas Diamond)。2022年,他和研究合作伙伴、華盛頓大學(xué)圣路易斯分校的菲利普·迪布維格(Philip Dybig)以及美聯(lián)儲(chǔ)的前主席本·伯南克(Ben Bernanke),共同獲得2022年的諾貝爾經(jīng)濟(jì)學(xué)獎(jiǎng)。

戴蒙德與迪布維格榮獲諾貝爾獎(jiǎng)的聯(lián)合研究認(rèn)為,銀行本身是脆弱的,容易受到“擠兌”沖擊,因?yàn)楫?dāng)客戶(hù)大量提款時(shí),貸款機(jī)構(gòu)可能不得不以低價(jià)出售本來(lái)應(yīng)該在到期后全額償付的債券或貸款。因此,毫無(wú)必要的恐慌情緒可能摧毀一家健康的銀行。

戴蒙德和迪布維格強(qiáng)調(diào),完善的監(jiān)管和審慎的管理能夠大大分散貸款和投資組合的風(fēng)險(xiǎn),再加上合理的客戶(hù)結(jié)構(gòu),這是提振客戶(hù)信心的關(guān)鍵,可以幫助美國(guó)的銀行擺脫危險(xiǎn)。

2022年10月,剛獲獎(jiǎng)不久的戴蒙德在接受《財(cái)富》雜志采訪時(shí)表示,美聯(lián)儲(chǔ)以殘酷的、史無(wú)前例的速度加息。很多公司和銀行曾經(jīng)相信,多年來(lái)保持凈零水平的通脹調(diào)整后的收益率會(huì)持續(xù)數(shù)年,而現(xiàn)在,這些公司和銀行正在遭受債券投資組合嚴(yán)重虧損。

我們針對(duì)硅谷銀行倒閉,對(duì)戴蒙德進(jìn)行了一個(gè)小時(shí)的采訪。戴蒙德在采訪中指出,雖然美聯(lián)儲(chǔ)的政策產(chǎn)生了影響,但這并非危機(jī)爆發(fā)的主要原因。硅谷銀行也沒(méi)有遭遇常見(jiàn)的“穩(wěn)健經(jīng)營(yíng)的銀行被擠兌毀掉”的情景。相反,硅谷銀行無(wú)論資產(chǎn)還是負(fù)債方面的政策都很糟糕。戴蒙德認(rèn)為,硅谷銀行能夠作為一個(gè)案例,用于研究在美聯(lián)儲(chǔ)大幅加息的背景下,為什么為支持危險(xiǎn)擴(kuò)張所執(zhí)行的不穩(wěn)定的結(jié)構(gòu)會(huì)帶來(lái)可怕的風(fēng)險(xiǎn),而謹(jǐn)慎經(jīng)營(yíng)的銀行卻可以避免風(fēng)險(xiǎn)。

銀行的運(yùn)行機(jī)制,以及硅谷銀行如何打破固有模式

戴蒙德介紹了銀行維持客戶(hù)信任和免受擠兌沖擊的標(biāo)準(zhǔn)方法。他解釋稱(chēng):“獲得諾貝爾委員會(huì)認(rèn)可的論文解釋了銀行應(yīng)該如何設(shè)置經(jīng)營(yíng)架構(gòu)。在資產(chǎn)方面,銀行向不同類(lèi)型的個(gè)人和企業(yè)客戶(hù)發(fā)放貸款。理想情況下,銀行通過(guò)多樣化配置能夠創(chuàng)建安全資產(chǎn),避免高風(fēng)險(xiǎn)資產(chǎn)。如果銀行擁有多樣化的資金來(lái)源,只要儲(chǔ)戶(hù)不在同一天需要取款,這種多樣化配置就使銀行可以有效利用其持有的現(xiàn)金和流動(dòng)資產(chǎn)。”

他表示,在負(fù)債方面,關(guān)鍵是銀行要服務(wù)廣泛的、各種各樣的儲(chǔ)戶(hù)。擁有大量零售客戶(hù)對(duì)銀行來(lái)說(shuō)是好事。當(dāng)國(guó)債利率上漲時(shí),零售客戶(hù)不太可能像企業(yè)客戶(hù)一樣,為獲得額外收益而取出所有儲(chǔ)蓄或清空貨幣市場(chǎng)賬戶(hù)。

戴蒙德指出,關(guān)鍵是要理解兩類(lèi)投資在硅谷銀行資產(chǎn)負(fù)債表中扮演的角色。

第一類(lèi)投資是可出售證券(Available for Sale),簡(jiǎn)稱(chēng)“AFS”。AFS包括銀行交易賬戶(hù)中能夠隨時(shí)出售的證券。所有AFS類(lèi)債券必須在每個(gè)季度末“按市值計(jì)價(jià)”。如果銀行在去年早些時(shí)候收益率極低時(shí)買(mǎi)入并持有美國(guó)國(guó)債,之后利率上浮,這些債券的價(jià)格大幅下跌,會(huì)影響銀行的資本狀況。

第二類(lèi)投資是持有至到期投資(Held to Maturity),簡(jiǎn)稱(chēng)HTM。該類(lèi)投資包括固定收益證券,銀行在資產(chǎn)負(fù)債表中持有這些證券,直至它們以票面價(jià)值被贖回為止。銀行可以每個(gè)季度一次在AFS和HTM類(lèi)別之間進(jìn)行切換。如果銀行需要補(bǔ)充資本,就能夠?qū)瘡拈L(zhǎng)期持有轉(zhuǎn)移到交易賬戶(hù)。但如果銀行轉(zhuǎn)讓產(chǎn)生未實(shí)現(xiàn)損失的HTM證券,這雖然會(huì)提高流動(dòng)性,卻會(huì)對(duì)銀行的賬面價(jià)值產(chǎn)生更大的影響。這就是硅谷銀行在破產(chǎn)前所面臨的困境。

2022年年底,硅谷銀行的AFS投資規(guī)模為260億美元,基本都是美股國(guó)債以及主要由房利美(Fannie Mae)和房地美(Freddie Mac)等政府贊助企業(yè)發(fā)行的“機(jī)構(gòu)”抵押貸款擔(dān)保證券。

戴蒙德指出,這些AFS債券均具有高流動(dòng)性;銀行可以輕松按照市場(chǎng)價(jià)格出售,并且如果銀行快速拋售債券,就能夠避免減值風(fēng)險(xiǎn)。硅谷銀行的資產(chǎn)負(fù)債表中還包括910億美元HTM債券,其中90%是機(jī)構(gòu)發(fā)行抵押貸款擔(dān)保證券,這些債券同樣從活躍興旺的市場(chǎng)中受益匪淺。硅谷銀行的740億美元信貸組合高度集中,主要是向科技初創(chuàng)公司及其創(chuàng)始人和管理者發(fā)放的貸款。這些公司和硅谷名人也是他們的主要儲(chǔ)戶(hù)。事實(shí)上,據(jù)媒體報(bào)道,硅谷銀行經(jīng)常在其貸款協(xié)議中要求借款人將存款存在該銀行。

硅谷銀行的投資與用來(lái)投資的存款不匹配

截至3月中旬,硅谷銀行在緊急情況下需要出售的AFS債券,收益率只有1.79%。顯然,該銀行在2022年春利率開(kāi)始大幅上調(diào)之前買(mǎi)入了大多數(shù)證券。AFS投資組合的平均期限長(zhǎng)達(dá)3.6年。2022年年底,約90%的HTM貸款期限超過(guò)10年,而這些基礎(chǔ)投資組合的回報(bào)率只有1.63%。顯然,硅谷銀行早在利率大幅上調(diào)之前買(mǎi)入了大部分HTM債券。在扣除信貸損失撥備后,硅谷銀行的貸款組合回報(bào)率遠(yuǎn)低于4%。

戴蒙德表示:“硅谷銀行的投資都是長(zhǎng)期投資,收益率極低。他們肯定認(rèn)為,只要儲(chǔ)戶(hù)一直將資金存在該銀行,就會(huì)一切正常,而且他們一直接受支票賬戶(hù)零利率和貨幣市場(chǎng)基金低于-1%的利率。在這種情況下,他們就可以持有債券直至到期,并獲得債券的全部?jī)r(jià)值。” 例如,硅谷銀行希望五年期國(guó)債比一年期國(guó)債額外獲得0.5%的收益率。

顯然,這種“脫離收益率曲線”的策略是錯(cuò)誤的。2022年,危機(jī)來(lái)臨。與一年前購(gòu)買(mǎi)的國(guó)債相比,這一年,五年期國(guó)債收益率從年初的低于1%,到秋天提高到4.5%左右。突然之間,硅谷銀行不得不為其儲(chǔ)蓄賬戶(hù)支付4.5%的利息,這是其一年前提供的利息。

在2022年中期之前,硅谷銀行的存款基礎(chǔ)似乎非常穩(wěn)定。不僅新客戶(hù)快速增長(zhǎng),而且其現(xiàn)有客戶(hù)繼續(xù)將資金存在該銀行。但當(dāng)利率大幅上漲時(shí),為了追求國(guó)債的高收益率,儲(chǔ)戶(hù)選擇提取存在硅谷銀行支票和貨幣市場(chǎng)的數(shù)十億美元存款。2022年,硅谷銀行的存款減少8%,今年1月和2月,儲(chǔ)戶(hù)流失速度加快。

3月8日,硅谷銀行發(fā)布一份8K文件稱(chēng),該銀行已經(jīng)出售了全部AFS債券,用于募集資金和向提款的客戶(hù)支付存款,并試圖通過(guò)發(fā)行價(jià)值12.5億美元的股票補(bǔ)充資金。出售AFS債券募集的款項(xiàng)為210億美元,導(dǎo)致該銀行稅前損失約24億美元,虧損幅度為11%。

戴蒙德認(rèn)為,硅谷銀行存在兩個(gè)咎由自取的根本問(wèn)題。首先是債券貶值。其債券的期限比存款基礎(chǔ)的期限更長(zhǎng),而且與摩根大通或美國(guó)銀行的存款相比,硅谷銀行的存款基礎(chǔ)并不穩(wěn)定。戴蒙德說(shuō):“利率上漲對(duì)其債券造成了沖擊,削減了該銀行的資本。他們不得不減記AFS債券,無(wú)論通過(guò)出售或其他方式。銀行管理層聲稱(chēng)減價(jià)出售這些債券,但事實(shí)并非如此。這些債券具有高流動(dòng)性。硅谷銀行緊急出售這些債券并沒(méi)有任何折扣。”因此,他表示,硅谷銀行的情況并不像傳統(tǒng)的災(zāi)難情境,即存款流失迫使銀行以極低的價(jià)格拋售難以出售的資產(chǎn)。

戴蒙德指出,早在硅谷銀行的8K文件引發(fā)擠兌之前,它就已經(jīng)瀕臨資不抵債,即將破產(chǎn)。他說(shuō)道:“隨著該銀行的‘募資’成本,即需要支付的存款利息,持續(xù)上漲至4%甚至更高,銀行為了留住客戶(hù),不得不支付更高利息。但作為銀行收入來(lái)源的債券組合,回報(bào)率卻低于2%。簡(jiǎn)而言之,資產(chǎn)產(chǎn)生的收益低于2%,但需要支付的負(fù)債卻達(dá)到5%。”收入和支出的利息赤字,意味著硅谷銀行注定要承受巨額營(yíng)業(yè)損失。

為了彌補(bǔ)損失,硅谷銀行需要將期限更長(zhǎng)的HTM證券轉(zhuǎn)移到交易賬戶(hù),以募集現(xiàn)金。而這樣做只會(huì)對(duì)其資本狀況造成更大影響。在8K文件的腳注中,硅谷銀行指出,如果將HTM證券按市值計(jì)價(jià),價(jià)格調(diào)整就會(huì)徹底清空其賬面資本。戴蒙德稱(chēng):“低利率的長(zhǎng)期債券向下調(diào)整幅度,甚至?xí)^(guò)AFS類(lèi)三年至五年期債券。”即使硅谷銀行能夠持有HTM組合至期滿(mǎn),營(yíng)業(yè)損失最終也會(huì)導(dǎo)致該銀行無(wú)力償債。戴蒙德表示:“這家銀行似乎在崩潰之前就已經(jīng)死亡或?yàn)l臨死亡。”

令戴蒙德震驚的另外一點(diǎn)是,雖然硅谷銀行特別容易因?yàn)槔噬蠞q受到?jīng)_擊,但面對(duì)債券收益率最終會(huì)從歷史低點(diǎn)上漲這一顯而易見(jiàn)的風(fēng)險(xiǎn),它幾乎沒(méi)有采取任何抵消措施。在摩根大通等經(jīng)營(yíng)狀況良好的機(jī)構(gòu),普遍會(huì)進(jìn)行利率對(duì)沖。

硅谷銀行未能實(shí)現(xiàn)存款基礎(chǔ)多樣化,增加了擠兌風(fēng)險(xiǎn)

戴蒙德認(rèn)為,硅谷銀行不僅未能將投資期限與儲(chǔ)戶(hù)瞬息萬(wàn)變的需求相匹配,還違反了銀行穩(wěn)健經(jīng)營(yíng)的第二條鐵律:吸引多樣化的客戶(hù)。他指出,在硅谷銀行,用于平衡硅谷初創(chuàng)公司及其富有的創(chuàng)始人的零售客戶(hù),所占的比例極小。

明尼蘇達(dá)大學(xué)(University of Minnesota)會(huì)計(jì)學(xué)教授薇薇安·方說(shuō):“有媒體報(bào)道,硅谷銀行會(huì)尋找那些計(jì)劃進(jìn)行新一輪風(fēng)投融資的公司,為他們提供大額貸款。這是該銀行業(yè)務(wù)飛速增長(zhǎng)的原因。”戴蒙德表示:“切記,資金流出長(zhǎng)達(dá)六個(gè)月。這些流失的客戶(hù)既不是程序員,也不是老師。他們都是公司的首席財(cái)務(wù)官。他們的存款幾乎都是大額存款。”而首席財(cái)務(wù)官們比普通客戶(hù),更快從支票賬戶(hù)中提款,以追求國(guó)債的高收益。

一天內(nèi)被提取的存款高達(dá)驚人的480億美元。戴蒙德驚嘆道:”這是史上規(guī)模最快的銀行擠兌。硅谷社區(qū)的客戶(hù)口口相傳。當(dāng)彼得·蒂爾和初創(chuàng)公司孵化機(jī)構(gòu)Y-Combinator建議人們趕緊取錢(qián)的時(shí)候,就會(huì)迅速發(fā)生擠兌,并且一發(fā)不可收拾。”

面對(duì)危機(jī)蔓延,戴蒙德?lián)膶捤傻谋O(jiān)管和美聯(lián)儲(chǔ)超級(jí)粗暴的政策

當(dāng)然,大多數(shù)中等規(guī)模銀行并不存在導(dǎo)致硅谷銀行倒閉的資金錯(cuò)配風(fēng)險(xiǎn),以及押注單一類(lèi)別客戶(hù)的經(jīng)營(yíng)策略。戴蒙德依舊擔(dān)心,美聯(lián)儲(chǔ)對(duì)區(qū)域銀行的監(jiān)管過(guò)于寬松,不足以避免未來(lái)的危機(jī)。

2010年《多德-弗蘭克法案》(Dodd-Frank Act)通過(guò)之后的幾年間,美聯(lián)儲(chǔ)對(duì)中等規(guī)模貸款機(jī)構(gòu)與富國(guó)銀行或花旗集團(tuán)等一視同仁,執(zhí)行嚴(yán)格的年度壓力測(cè)試。但在2018年,美國(guó)前總統(tǒng)唐納德·特朗普的政府成功通過(guò)了一項(xiàng)放松監(jiān)管法案,大幅減少了對(duì)區(qū)域銀行進(jìn)行壓力測(cè)試的頻率和嚴(yán)格程度。

“我從最新的壓力測(cè)試中發(fā)現(xiàn),美聯(lián)儲(chǔ)評(píng)估了銀行在利率從0%到2%的表現(xiàn),它似乎認(rèn)為利率不會(huì)超過(guò)2%。因此,幾乎所有銀行都通過(guò)了測(cè)試。但測(cè)試的標(biāo)準(zhǔn)區(qū)間應(yīng)該是0%至7%。”(硅谷銀行被免于參加2021年的最新壓力測(cè)試,因?yàn)槠滟Y產(chǎn)規(guī)模依舊低于規(guī)定水平。2022年,雖然其資產(chǎn)規(guī)模超過(guò)了規(guī)定水平,但硅谷銀行仍然未被安排測(cè)試。)

戴蒙德感到意外的是,硅谷銀行客戶(hù)的單一結(jié)構(gòu)和不安情緒,以及該銀行持有低收益長(zhǎng)期債券的策略等警告信號(hào),卻沒(méi)有引起美聯(lián)儲(chǔ)和加利福尼亞州金融保護(hù)與創(chuàng)新部(California Department of Financial Protection and Innovation)的重視。

顯然,美聯(lián)儲(chǔ)未來(lái)需要假設(shè)更高利率水平,預(yù)測(cè)中等規(guī)模銀行的未來(lái)前景,而這種調(diào)整將要求貸款機(jī)構(gòu)持有更多資本。由于對(duì)AFS證券按市值計(jì)價(jià)已經(jīng)導(dǎo)致銀行股價(jià)下跌,可以想象,區(qū)域性銀行將不得不通過(guò)發(fā)行股票來(lái)恢復(fù)資本規(guī)模。反過(guò)來(lái),銀行宣布需要出售股份,可能引發(fā)儲(chǔ)戶(hù)退出。

當(dāng)然,正是美聯(lián)儲(chǔ)超級(jí)粗暴的政策,令銀行陷入這種困難境地。戴蒙德表示:“隨著美聯(lián)儲(chǔ)在一年內(nèi)將利率從1%提高到5%,它所產(chǎn)生的系統(tǒng)性問(wèn)題不足為奇。在榮獲諾貝爾獎(jiǎng)后的發(fā)言中,我主要討論了快速加息將如何對(duì)公司造成傷害。但過(guò)快加息也會(huì)給銀行造成嚴(yán)重傷害。”戴蒙德認(rèn)為,美聯(lián)儲(chǔ)需要“更緩慢、更慎重的”加息,以便于在類(lèi)似于硅谷銀行危機(jī)的情況沖擊整個(gè)銀行系統(tǒng)之前先發(fā)制人。

按照美國(guó)國(guó)家經(jīng)濟(jì)研究局的說(shuō)法,道格拉斯·戴蒙德榮獲諾貝爾獎(jiǎng)的原因是,他提供的“洞察為現(xiàn)代銀行業(yè)監(jiān)管奠定了基礎(chǔ)”。戴蒙德在研究中高度推崇完善的管理和監(jiān)管,他認(rèn)為這是保證銀行安全的關(guān)鍵。但他認(rèn)為在硅谷銀行危機(jī)中缺少了這兩點(diǎn)。

一旦銀行偏離戴蒙德的模式,就會(huì)陷入困境。我們只能希望硅谷銀行倒閉是個(gè)例,希望美聯(lián)儲(chǔ)殘酷的加息和疲軟的監(jiān)管,不會(huì)導(dǎo)致銀行業(yè)持續(xù)暴雷,在美國(guó)經(jīng)濟(jì)瀕臨衰退的時(shí)刻擾亂美國(guó)信用市場(chǎng)。(財(cái)富中文網(wǎng))

譯者:劉進(jìn)龍

審校:汪皓

Small wonder that most Americans are stunned and confused by the sudden fall of Silicon Valley Bank. How did a cornerstone of the dynamic venture capital community, the nation’s 16th-largest lending institution that until recently enjoyed the growth worthy of the tech startups it served, fall so hard, so fast? Is its failure the legacy of poor practices specific to SVB, or is the Fed’s policy of drastically hiking rates that hammers the value of banks’ investments endangering fellow midsize lenders? Even if bad management destroyed SVB, why didn’t its top regulators, the Fed and the California banking authorities, see this runaway train wobbling on the tracks, and force the drivers to throttle back before it derailed?

I thought of just the expert to skirt the usual dense jargon and provide easy-to-grasp answers. He’s Douglas Diamond, professor at the University of Chicago’s Booth School of Business who shared the 2022 Nobel Prize for Economics with his research partner, Philip Dybig of Washington University in St. Louis, and former Fed chairman Ben Bernanke. The Diamond-Dybig research that captured the Nobel stressed that banks are inherently fragile and vulnerable to “runs,” because if customers exit en masse, the lenders may need to sell their bonds or loans, which would have fully paid off on maturity, at fire-sale prices. Hence, a panic can unnecessarily ruin an otherwise healthy bank. Diamond and Dybig emphasize that both sound regulation and prudent management that broadly diversifies the risk in both the loan and investment portfolios, and makeup of customers, are essential to instilling client confidence required to keep America’s banks out of harm’s way.

In October, just after receiving the prize, Diamond warned in a Fortune interview that the Fed’s policies of raising rates at a brutal, virtually unprecedented pace would trigger dangerously big losses in the bond portfolios of companies and banks that believed inflation-adjusted yields sitting at near-zero for years would stay there for years to come.

But in our hour-long interview on the SVB debacle, Diamond stated that though Fed policy hurt, it wasn’t the main reason for the implosion. Nor did SVB suffer the classic “sound bank wrecked by a stampede” scenario. Instead, SVB deployed just about every bad policy on both the assets and liabilities sides of its balance sheet. For Diamond, SVB is a case study in how setting a rickety structure to enable breakneck expansion created daunting risks that prudently run banks, despite the Fed’s huge run-up in rates, have avoided.

What make banks work, and how SVB broke the mold

Diamond described the template for how banks secure their customers’ trust, and protect themselves from a wave of withdrawals. “The papers that the Nobel Committee recognized explained how banks should be structured,” he explains. “On the asset side, banks make loans to lots of different types of people and businesses. Ideally, banks create safe assets out of risky ones by diversifying. They have diversified funding sources so that since depositors all don’t need their money on the same date, that diversification allows the bank to economize on what they hold in cash and liquid assets.” As for liabilities, he adds, it’s key that banks serve a wide, varied range of depositors. Having loads of retail customers is a boon. When rates on Treasuries jump, they’re less likely to empty their savings or money market accounts to get some extra yield than are corporate clients.

As Diamond notes, it’s crucial to understand the role of the two classes of investments on SVB’s balance sheet. The first grouping is called Available for Sale, or AFS. It consists of securities in the trading account banks are free to sell at any time. All bonds in the AFS designation must be “marked to market” at the end of each quarter. If a bank is holding Treasuries it bought early last year at extremely low yields, and rates jump, the prices of those bonds fall sharply, hitting the bank’s capital. The second investment category is Held to Maturity, or HTM. It comprises the fixed income securities that the bank intends to keep on its balance sheet until they’re redeemed at their full par value. Once each quarter, banks can shift securities between AFS and HTM—if they need to replenish their equity, they’ll transfer bonds from the long-term hold to the trading account. But if a bank transfers HTM securities that have an unrealized loss, that would raise liquidity but hit their book equity even harder. This is a quandary SVB faced before the deluge.

At the close of 2022, SVB counted $26 billion in AFS, virtually all in Treasuries and “agency” mortgaged backed securities issued mainly by GSE’s Fannie Mae and Freddie Mac. As Diamond points out, those AFS bonds were all highly liquid; they’d easily sell at full market price, and stood no danger of suffering a haircut if dumped fast. SVB’s balance sheet also contained $91 billion in HTM bonds, of which over 90% sat in agency-issued mortgage securities that also benefit from a deep, active market. Its $74 billion credit portfolio was highly concentrated, consisting primarily of loans to tech startups, as well as their founders and managers. Those companies and Silicon Valley bigwigs also were also their main depositors. It’s been reported, in fact, that SVB often placed covenants in its loan agreements requiring that a borrower keep its deposits at the bank.

SVB mismatched its investments to the deposits funding them

The bonds in AFS, the ones SVB would need to sell in an emergency, were generating a puny yield of just 1.79% as of mid-March. Clearly, it had purchased most of those securities well before rates started spiking big-time in the spring of 2022. The average maturity on the AFS portfolio was a substantial 3.6 years. At the end of 2022, nearly 90% of the HTM loans carried maturities of over 10 years, and the return on that bedrock portfolio was just 1.63%—once again, SVB had bought almost all those bonds way before rates exploded. Its loan portfolio was also garnering low returns of well under 4% after provisions for credit losses.

“Their investments were pretty long-term, and they were generating very low yields,” says Diamond. “They must have figured that scenario would work fine if every depositor stayed forever, and they kept accepting zero rates on checking accounts and sub-1% rates on money market funds. In that case, they could hold their bonds to maturity and get full value.” It’s clear that SVB’s strategy to “go out on the yield curve” to garner an extra 0.5%, say, on a five-year versus a one-year Treasury, was a mistake. The crunch came in 2022, when yields on five-year Treasuries competing with the ones they bought a just a year before jumped from under 1% at the start of the year to the mid-4% range by fall. Suddenly, SVB was forced to pay 4.5% on savings accounts, a multiple of what it offered a year before.

It appears that before mid-2022, SVB’s deposit base was extremely stable. Not only did it keep adding new customers at a rapid clip, but its existing clients kept their deposits in place. But when rates surged, depositors who’d parked billions in SVB’s checking and money markets pulled their cash in pursuit of the sumptuous yields on Treasuries. In 2022, SVB lost 8% of its deposits, and the exodus accelerated in January and February. On March 8, it issued an 8K stating that it had sold all of its AFS bonds to raise money and pay fleeing customers, and sought to refill its coffers via a $1.25 billion stock offering. The AFS sale raised $21 billion, causing a pre-tax loss of around $2.4 billion, or 11%.

For Diamond, SVB faced two fundamental problems of its own making. The first was the fall in the value of its bonds, which had long maturities compared with a deposit base potentially far less stable than those at a JPMorgan Chase or Bank of America. “The rise in rates hit their bonds and cut their capital down,” says Diamond. “They had to write down the AFS bonds whether they sold them or not. The management claimed it was a fire sale, but it wasn’t a fire sale. Those bonds were highly liquid. SVB didn’t take any discount for selling in a hurry.” Hence, he says, SVB was far from the traditional disaster case where a flight of deposits forces a bank to jettison hard-to-sell assets at distress prices.

Diamond posits that even before the 8K announcement ignited the run, SVB was close to insolvent, and rapidly heading for failure. “As their cost of ‘funding,’ meaning the interest they had to pay on deposits, kept rising to 4% and higher, they’re forced to pay that higher interest needed to keep their customers. But their bond portfolio, where the money comes from, is paying them less than 2%,” he says. “Put simply, you’re getting less than 2% on your assets and paying out, say, 5% on your liabilities.” That deficit of interest coming in and out meant that SVB was destined for big operating losses.

To cover those losses, SVB would need to raise cash by shifting its longer-maturity HTM securities to the trading account. But doing so would have pounded its capital even harder. And in a footnote to the 8K, SVB noted that if it marked its HTM securities to market, the adjustment would wipe out all of its book capital. “The downward adjustment on long-term bonds carrying low rates would be even steeper than on the three-to-five-year bonds in AFS,” says Diamond. Even if they were able to hold the HTM portfolio to maturity, the operating losses would eventually render the bank insolvent. “It appears that they were already dead or dying before the meltdown,” says Diamond.

It also astounds Diamond that although SVB was highly vulnerable to a rise in rates, it did little hedging to offset the obvious risk that yields would eventually jump from their historic lows. Rate hedging is practiced extensively by well-run institutions such as JPMorgan.

SVB’s failure to diversify the deposit base increased risks of a run

For Diamond, besides failing to match its investments’ maturities to its depositors’ quicksilver demands, SVB also violated the second tenet of sound banking: attracting a broad mix of customers. He points out that SVB had an extremely small proportion of retail clients to balance all the Silicon Valley startups and their wealthy founders. “SVB reportedly looked for companies that were getting new VC funding, and offered them large loans,” says Vivian Fang, an accounting professor at the University of Minnesota. “That’s how they grew their business so rapidly.” Adds Diamond, “Keep in mind that money had been flowing out for six months. These weren’t programmers or teachers leaving. They were CFOs. Almost all of their deposits were wholesale.” Once again, the CFOs were much quicker to pull cash from checking accounts and grab those big Treasury yields than regular folks would have been.

An incredible $48 billion in deposits departed in a single day. “It was the fastest bank run in history,” marvels Diamond. “The customers in the Silicon Valley community all talk to one another. When Peter Thiel and Y-Combinator, the startup hub, say to get your money out, when that happens, the run will be fast and complete.”

On contagion, Diamond is concerned about lax regulation and the Fed’s super-tough policies

Of course, most midsize banks aren’t risking the funding mismatch and all-in-on-a-single-client approach that sank SVB. Still, Diamond worries that the Fed’s oversight of regional banks, in itself, is far too light to prevent further blowups. In the early years following the passage of the Dodd-Frank legislation in 2010, the central bank imposed the same tough annual tests on midsize lenders as the likes of Wells Fargo or Citigroup. But in 2018, the Trump administration successfully championed a regulatory relief bill that greatly reduced the frequency and severity of the stress exams for regionals. “I looked at the latest stress test, and the Fed was assessing how the banks would perform at rates from 0% to 2%, as if 2% was as high as they’d ever go. So almost any bank would pass. The standard should have been 0% to 7%.” (SVB was exempt from what would have been its last stress test in 2021 because its assets were still below the required level. It was not scheduled for testing in 2022 when its assets passed the threshold.) In SVB’s case, Diamond is surprised that the Fed and California Department of Financial Protection and Innovation didn’t see the red flags raised by SVB’s slender, restless clientele and holdings of low-yielding, long-duration bonds.

Obviously, the Fed will need to predict the midsize banks’ outlook using much higher rate assumptions in the future, a shift that could require lenders to hold far more capital. Since marking their AFS securities to market is already denting their equity, it’s conceivable that regionals will need to float equity to restore their capital. In turn, announcing you need to sell stock could send depositors for the exits. Of course, it’s the super-tough Fed policy that’s put banks in this difficult position. “When the Fed takes rates from 1% to 5% in a year, it shouldn’t be surprising if that causes trouble in the system,” says Diamond. “When we spoke after I received the Nobel, I talked mainly about how fast-rising rates would hurt companies. But the incredible speed of the hikes hurts banks a lot too.” Diamond believes that the Fed should be “much more slow and deliberate” in raising rates, in part to forestall more SVB-like shocks to the system.

Doug Diamond won his Nobel for, in the words of the National Bureau of Economic Research, providing “insights [that] form the basis of modern bank regulation.” For Diamond, the sound management practices and regulation that he extolled in his research, that make banks safe, was sorely lacking in the SVB catastrophe. Banks get in trouble when they veer from the Diamond model. We can only hope that SVB was a lone case, and that the Fed’s relentless march and weak regulation won’t produce a flurry of renegades that roil America’s credit markets just as our economy teeters on the brink of recession.

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