https://www.youngju.dev/blog 천천히 올바르게. AI Researcher & DevOps Engineer Youngju's tech blog. GPU/CUDA, LLM, MLOps, Kubernetes AI workloads, distributed training, and data engineering. ko fjvbn2003@gmail.com (Youngju Kim) fjvbn2003@gmail.com (Youngju Kim) Mon, 25 May 2026 00:00:00 GMT https://www.youngju.dev/blog/culture/2026-05-25-prime-brokerage-goldman-morgan-stanley-jp-morgan-bofa-citi-ubs-bnp-deutsche-2026-deep-dive.en https://www.youngju.dev/blog/culture/2026-05-25-prime-brokerage-goldman-morgan-stanley-jp-morgan-bofa-citi-ubs-bnp-deutsche-2026-deep-dive.en Prime brokerage (PB) is the operating backbone of the hedge fund industry. Cash and securities settlement, margin financing, securities lending, capital introduction, and risk management are bundled into a single operating substrate. The 2021 collapse of Archegos Capital Management left a `$5.5B` hole in Credit Suisse, a `$2.9B` loss at Nomura, and several hundred million in losses at Morgan Stanley, UBS, and Mitsubishi UFJ — and rewired the risk model of the entire industry. By 2026 the bulge bracket (Goldman, Morgan Stanley, JP Morgan) absorbs roughly half of global hedge fund AUM; BofA, Citi, UBS, BNP, Deutsche, and Nomura share most of the rest; and mini-primes such as Wedbush, TD Cowen, and Interactive Brokers Prime Pro serve mid- and small-AUM funds. In Korea, Mirae Asset, NH Investment & Securities, and Korea Investment Holdings run a roughly 5 trillion KRW PBS market. In Japan, Nomura, SMBC Nikko, and Daiwa compete with global PB desks. This guide walks through the five core PB services, hedge fund onboarding, Reg T vs portfolio margin, short selling infrastructure (locate + borrow), the securities lending market, the Archegos aftermath, and the Korean and Japanese PBS landscapes. Mon, 25 May 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) prime-brokeragegoldman-sachs-pbmorgan-stanley-pbjp-morgan-pbbofa-pbciti-pbubs-pbbnp-paribas-pbdeutsche-bank-pbnomura-pbhedge-fund-servicessecurities-lendingarchegos-failurekr-pbskorea-pbsmini-prime https://www.youngju.dev/blog/culture/2026-05-25-prime-brokerage-goldman-morgan-stanley-jp-morgan-bofa-citi-ubs-bnp-deutsche-2026-deep-dive.ja https://www.youngju.dev/blog/culture/2026-05-25-prime-brokerage-goldman-morgan-stanley-jp-morgan-bofa-citi-ubs-bnp-deutsche-2026-deep-dive.ja プライム・ブローカレッジ（Prime Brokerage、PB）は、ヘッジファンドの運営インフラそのものである。現金・証券決済、マージン・ファイナンシング、株式貸借（Securities Lending）、キャピタル・イントロダクション、リスク管理が一つに束ねられて提供される。2021年のArchegos Capital Managementの破綻はCredit Suisseに`$5.5B`、Nomuraに`$2.9B`の損失を残し、Morgan Stanley・UBS・三菱UFJにも数億ドル規模の傷を負わせ、PB産業のリスク管理モデルを根本から書き換えた。2026年現在、bulge bracket（Goldman・Morgan Stanley・JP Morgan）がグローバルHF AUMの約半分を吸収し、BofA・Citi・UBS・BNP・Deutsche・Nomuraがその残りを分け合う。Wedbush・TD Cowen・Interactive Brokers Prime Proなどのミニ・プライムが中小HF市場を担う。韓国ではMirae Asset・NH投資証券・韓国投資証券のPBSが5兆ウォン市場を形成し、日本ではNomura・SMBC日興・大和が外資系PBと共存する。本稿はPBの5つのコアサービス、ヘッジファンド・オンボーディング、Reg Tとportfolio margin、ショート販売インフラ（locate + borrow）、証券貸借市場、Archegosの余波、韓国・日本のPBS市場までを一気通貫で整理する。 Mon, 25 May 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) prime-brokeragegoldman-sachs-pbmorgan-stanley-pbjp-morgan-pbbofa-pbciti-pbubs-pbbnp-paribas-pbdeutsche-bank-pbnomura-pbhedge-fund-servicessecurities-lendingarchegos-failurekr-pbskorea-pbsmini-prime https://www.youngju.dev/blog/culture/2026-05-25-prime-brokerage-goldman-morgan-stanley-jp-morgan-bofa-citi-ubs-bnp-deutsche-2026-deep-dive https://www.youngju.dev/blog/culture/2026-05-25-prime-brokerage-goldman-morgan-stanley-jp-morgan-bofa-citi-ubs-bnp-deutsche-2026-deep-dive 프라임 브로커리지(Prime Brokerage, PB)는 헤지펀드의 운영 인프라 그 자체다. 현금·증권 결제, 마진 파이낸싱, 주식 대차(Securities Lending), 캐피털 인트로덕션, 리스크 관리, 트레이딩 인프라가 한 덩어리로 묶여 제공된다. 2021년 Archegos Capital Management의 폭발은 Credit Suisse에 `$5.5B` 손실, Nomura에 `$2.9B` 손실, Morgan Stanley·UBS·Mitsubishi UFJ에도 수억 달러대 상흔을 남기며 PB 산업의 리스크 관리 모델을 통째로 바꿔놓았다. 2026년 현재 Bulge bracket(Goldman·Morgan Stanley·JP Morgan)이 글로벌 HF AUM의 절반을 흡수하고, BofA·Citi·UBS·BNP·Deutsche·Nomura가 나머지를 나눠가지며, Wedbush·Cowen(TD Cowen)·Interactive Brokers Prime Pro 같은 mini-prime이 mid·small HF 시장을 채운다. 한국에서는 미래에셋·NH투자증권·한국투자증권 PBS가 5조원 시장을 형성했고, 일본에서는 Nomura·SMBC Nikko·Daiwa가 외국계 PB와 경쟁한다. 이 글은 PB의 5대 코어 서비스, 헤지펀드 온보딩, Reg T vs portfolio margin, 공매도 인프라(locate + borrow), securities lending market, Archegos 후폭풍, 한국·일본 PBS 시장까지 한 호흡으로 풀어낸다. Mon, 25 May 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) prime-brokeragegoldman-sachs-pbmorgan-stanley-pbjp-morgan-pbbofa-pbciti-pbubs-pbbnp-paribas-pbdeutsche-bank-pbnomura-pbhedge-fund-servicessecurities-lendingarchegos-failurekr-pbskorea-pbsmini-prime