Credit Suisse First Boston
Credit Suisse First Boston was the investment-banking brand created through Credit Suisse's integration of First Boston and used for much of the group's global investment-banking business.
Last updated October 6, 2026
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Overview
Credit Suisse First Boston, commonly abbreviated CSFB, was a major investment-banking brand associated with Credit Suisse. Its history combined the United States investment bank First Boston, founded in 1932, with the Swiss banking group Credit Suisse. The relationship began in 1978, when Credit Suisse acquired a minority interest in First Boston, at a time when foreign banks were seeking access to the expanding and increasingly international U.S. securities market. Credit Suisse later increased its ownership and ultimately brought First Boston under its control. The brand became especially important after Credit Suisse acquired full control of First Boston in the 1990s. In 1997, the investment-banking operations were reorganized under the Credit Suisse First Boston name. The combined platform gave Credit Suisse a substantial presence in corporate finance, mergers and acquisitions, equity and debt underwriting, sales and trading, research, and institutional securities services. Its business served corporations, governments, financial institutions, sponsors, and institutional investors across North America, Europe, Asia-Pacific, and other international markets. CSFB was one of the best-known global investment-bank names during the expansion of the international capital markets in the 1990s and early 2000s. It participated in large public offerings, leveraged-finance transactions, corporate restructurings, acquisitions, and fixed-income and equity trading. The franchise also inherited the strengths and risks of the pre-2008 investment-banking model, including dependence on wholesale funding, trading inventories, securitized products, and highly competitive institutional markets. Credit Suisse changed the presentation of the brand several times. In 2006, the group announced that it would operate under the single Credit Suisse name, ending the routine use of Credit Suisse First Boston as a separate customer-facing global brand. The investment bank continued as a major division of Credit Suisse, and the CSFB name remained visible in some legal entities, historical references, and market relationships. In 2015, Credit Suisse again described its investment-banking business using the Credit Suisse First Boston name as part of a broader organizational and branding adjustment, although the group continued to be presented publicly as Credit Suisse. The franchise was affected by the global financial crisis and by later legal, risk-management, and governance problems involving Credit Suisse. These issues included investigations and settlements connected with mortgage-related securities, benchmark and securities-market conduct, and the bank's dealings with Archegos Capital Management and Greensill-linked funds. The problems were group-level matters, but they affected the credibility, capital allocation, and operating scope of the investment-bank franchise. In March 2023, UBS agreed to acquire Credit Suisse in an emergency transaction supported by Swiss authorities. Following completion of the acquisition, UBS began integrating or winding down Credit Suisse businesses and progressively retired the Credit Suisse brand. Credit Suisse First Boston therefore no longer operates as an independent active global brand. Its historical significance lies in the creation of a large cross-border investment bank from the combination of First Boston and Credit Suisse, and in its role as one of the principal Wall Street-linked franchises within Credit Suisse.
History
First Boston was established in New York in 1932 as an investment bank focused on corporate finance and securities underwriting. It became one of the prominent U.S. firms serving large corporations and institutional investors. Credit Suisse entered the relationship in 1978 by acquiring a minority stake in First Boston. The transaction reflected the growing internationalization of capital markets and the desire of European banks to build a direct U.S. investment-banking presence. Credit Suisse increased its ownership over time. During the late 1980s, First Boston encountered serious problems associated with leveraged-finance commitments and the changing debt markets. Credit Suisse provided support and expanded its control, ultimately making First Boston a controlled subsidiary. The combination connected First Boston's U.S. securities franchise with Credit Suisse's Swiss and international banking network. In 1997, the investment-bank operations were reorganized under the Credit Suisse First Boston name. The new organization pursued a full-service model, covering advisory work, mergers and acquisitions, equity and debt issuance, leveraged finance, sales and trading, research, and structured products. It grew through a combination of internal expansion and acquisitions, including the integration of businesses obtained through Credit Suisse's broader expansion in investment banking and asset management. The CSFB name became a familiar presence in global equity, bond, loan, and advisory markets. The brand was also associated with a period of aggressive expansion in trading and structured finance. Like many large investment banks, it benefited from strong capital-markets activity before 2008 but was exposed to the subsequent collapse in credit and securitized-product markets. Credit Suisse survived as an operating group, but the crisis led to major changes in risk management, capital requirements, business mix, and executive leadership. After the crisis, the investment bank operated within a more tightly regulated and more capital-constrained Credit Suisse group. In 2006, Credit Suisse adopted a single global brand and generally dropped First Boston from customer-facing corporate branding. The investment-banking division nevertheless remained central to Credit Suisse's business model, and CSFB continued to appear in legal names, historical descriptions, and market usage. In 2015, the group again referred to its investment-banking platform as Credit Suisse First Boston while reorganizing the bank around major divisions. This was primarily an organizational and branding decision rather than the creation of a newly independent bank. During the 2010s and early 2020s, Credit Suisse faced repeated legal, regulatory, risk, and governance controversies. Group-level matters included settlements concerning mortgage-backed securities and other market conduct, investigations involving foreign-exchange and benchmark activity, and losses associated with the collapse of Archegos Capital Management. The failure of Greensill-related investment funds also damaged confidence in Credit Suisse's controls and product governance. Although these events were not all specific to the CSFB trademark, they affected the investment-banking franchise because it operated within the same group, balance sheet, control environment, and leadership structure. In March 2023, UBS agreed to acquire Credit Suisse with support from Swiss authorities. The transaction was completed in June 2023, after which UBS began integrating Credit Suisse operations and rationalizing overlapping businesses. The Credit Suisse and CSFB identities consequently lost their status as active independent global banking brands. Credit Suisse First Boston is now best understood as a historical investment-banking brand and a former division-level identity within Credit Suisse.
- 2023
UBS acquires Credit Suisse
[3]UBS completed its acquisition of Credit Suisse, ending the independent operation of the group and effectively retiring CSFB as an active standalone brand.
- 2015
The CSFB name returns for investment banking
[1]Credit Suisse revived the Credit Suisse First Boston designation for its investment-banking activities during a wider organizational restructuring.
- 2006
Credit Suisse adopts a unified group brand
[1]The group moved toward using Credit Suisse as its single external brand, reducing the separate prominence of CSFB.
- 1997
Credit Suisse First Boston becomes the combined investment-bank identity
[1]Credit Suisse reorganized its investment-banking operations under the Credit Suisse First Boston name.
- 1988
Credit Suisse expands control
[1]Credit Suisse increased its involvement in First Boston after the investment bank experienced difficulties connected with leveraged finance and debt-market exposure.
- 1978
Credit Suisse takes a stake in First Boston
[1]Credit Suisse acquired a minority interest in First Boston, beginning the relationship that ultimately brought the U.S. investment bank under Swiss ownership.
- 1932
First Boston is established
[2]First Boston was founded in New York as a corporate-finance and securities firm, establishing the U.S. investment-banking heritage later incorporated into CSFB.
Products and positioning
A global, full-service investment bank combining Credit Suisse's international banking network with First Boston's U.S. corporate-finance and securities-market heritage.
Investment banking
Mergers and acquisitions advisory
CSFB advised corporations, financial institutions, governments, and sponsors on acquisitions, disposals, mergers, takeover defenses, and other strategic transactions. This advisory work was one of the franchise's core connections to large corporate clients.
Securities underwriting
Equity capital markets
The business arranged initial public offerings, follow-on offerings, convertible securities, and other equity-linked transactions. It combined issuer advice, underwriting, distribution, equity research, and institutional sales capabilities.
Corporate finance
Debt and leveraged finance
CSFB originated and arranged investment-grade debt, high-yield bonds, leveraged loans, acquisition financing, and sponsor-backed transactions. Leveraged finance was an important part of First Boston's historical identity and also a source of risk during periods of market stress.
Institutional markets
Sales and trading
The franchise provided institutional clients with execution, market-making, research, and trading services across equities, rates, credit, currencies, commodities, and related products. Its trading businesses supported both client activity and the underwriting platform.
Structured finance
Securitized products
The investment bank participated in the origination, structuring, underwriting, distribution, and trading of mortgage-related and other securitized products. This business was materially reshaped by the global financial crisis and subsequent regulatory reforms.
Controversies
2021
Archegos collapse
Credit Suisse suffered major losses after the failure of Archegos Capital Management and subsequently faced criticism over risk controls, prime-brokerage oversight, and governance. The incident contributed to leadership changes and a reassessment of the investment bank's risk appetite.
2021
Greensill-linked funds collapse
Credit Suisse suspended funds linked to Greensill Capital after the supply-chain-finance firm failed. The episode raised questions about product governance, due diligence, and the bank's distribution of investment products to clients.
2014
Mortgage-backed securities settlement
Credit Suisse reached a settlement with U.S. authorities concerning the sale and underwriting of residential mortgage-backed securities before the financial crisis. The matter concerned group-level conduct and affected the reputation of its investment-banking platform.
2008
Global financial crisis and mortgage-securities exposure
Credit Suisse's investment-banking activities, including businesses historically associated with CSFB, were affected by the collapse of the structured-credit and mortgage-securities markets. The episode led to substantial changes in capital, risk controls, and the scope of investment-banking activity across the industry.
Brand decisions
2023
UBS acquisition of Credit SuisseM&ABackground
A loss of market confidence and liquidity pressure led Swiss authorities to support an emergency combination of Credit Suisse with UBS.
Action taken
UBS agreed to acquire Credit Suisse and subsequently began integrating, restructuring, and winding down overlapping activities.
Aftermath
Credit Suisse First Boston ceased to function as an independent active investment-bank brand.
2015
Reorganize investment banking and revive the CSFB designationStrategyBackground
Credit Suisse undertook a group-wide restructuring intended to simplify reporting lines, change capital allocation, and refocus its business model.
Action taken
The bank again used Credit Suisse First Boston as the designation for its investment-banking activities while maintaining Credit Suisse as the group brand.
Aftermath
The name returned to market usage, although it did not become a separately listed or independent bank.
2006
Adopt a single Credit Suisse brandStrategyBackground
Credit Suisse sought a more unified international identity after operating with several historically important businesses and names.
Action taken
The group reduced the external prominence of Credit Suisse First Boston and presented the organization primarily as Credit Suisse.
Aftermath
CSFB remained an important historical and legal reference, but the investment bank was increasingly marketed as part of Credit Suisse.
Sources5 sources
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