Investment banking
type of private company
Investment banking is an advisory-based financial service primarily for corporations, governments, and institutional investors. Traditionally associated with corporate finance, such a bank might assist in raising financial capital by underwriting or acting as the client's agent in the issuance of debt or equity securities. An investment bank may also provide services to companies involved in mergers and acquisitions (M&A). These services may include market making, trading of derivatives and equity securities, FICC services (fixed income instruments, currencies, and commodities), or research (macroeconomic, credit, or equity research). Most investment banks maintain prime brokerage and asset management departments alongside their investment research businesses. The industry is broken into the Bulge Bracket (upper tier), Middle Market (mid-level businesses), and boutique market (specialized businesses).
Unlike commercial banks and retail banks, investment banks do not take deposits. The revenue model of an investment bank comes mostly from the collection of fees for advising on a transaction, contrary to a commercial or retail bank. From the passage of Glass–Steagall Act in 1933 until its repeal in 1999 by the Gramm–Leach–Bliley Act, the United States maintained a separation between investment banking and commercial banks. Other industrialized countries, including G7 countries, have historically not maintained such a separation.
This brief starts where responsible research should: with the source description of “Investment banking” as type of private company. Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the history & society register because the source frames it as type of private company. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Chronology, provenance and viewpoint should be read together before a broad social or political interpretation is accepted. The source revision retrieved here is dated Sep 26, 2026. The linked authority identifier is Q319845. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1933 and 1999.
Later summaries often reconcile disputed chronology or motive more neatly than the contemporary record permits. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Investment banking” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.