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Black Wednesday
Black Wednesday, also known as the ERM crisis, was 16 September 1992, when Britain's defense of sterling's fixed exchange rate collapsed and the pound was allowed to float.
Black Widow (Chechnya)
Black Widows (Russian chernye vdovy) are Chechen female suicide bombers of the Second Chechen War, first active June 2000 via Khava Barayeva; known for Dubrovka, Beslan, and the 2010 Moscow metro attacks.
Black-and-tan faction
The Black-and-tan faction was the biracial wing of the post-Reconstruction Southern Republican Party, opposing the lily-white faction; led by figures like Norris Wright Cuney and Powell Clayton, it lost most state parties by the early twentieth century.
Black-eyed children
Black-eyed children (BEKs) are an internet urban legend about pale children with entirely black eyes who beg entry to homes or cars. Originated with Brian Bethel's 1996 Abilene, Texas account, posted online January 1998; no physical evidence exists.
Black-topped pottery
Black-topped pottery is a Predynastic Egyptian ware with a burnished red body and black rim, typical of Naqada I and II, about 4000 to 3000 BC.
Black-yellow-white flag of the Russian Empire
The black-yellow-white flag (чёрно-жёлто-белый флаг), also called the Romanov or Köhne flag, was the state flag of the Russian Empire from 11 June 1858, displaced for decoration in 1883 by Alexander III and finally superseded by the white-blue-red tricolor in 1896.
Black–Scholes equation
The Black–Scholes equation, also called the Black–Scholes–Merton equation, is a partial differential equation that option prices must satisfy, derived by Fischer Black and Myron Scholes in 1973.
Black–Scholes model
The Black–Scholes model, also called the Black–Scholes-Merton model, is a mathematical formula for pricing stock options, published by Fischer Black and Myron Scholes in 1973.
Blackballing
Blackballing: rejecting a club membership candidate by secret ballot, white ball for approval, black ball against; word from 1770, used in gentlemen's clubs, Freemasonry, and fraternities, now figurative for exclusion.
Blackbeard
Blackbeard (Edward Teach, c. 1680–1718) was an English pirate whose flagship Queen Anne's Revenge, the captured French slaver La Concorde, blockaded Charleston in 1718 and wrecked at Beaufort Inlet, where its 1996-discovered wreck has yielded over 400,000 artifacts.
Blackberry coalition
Blackberry coalition (Brombeer-Koalition): German three-party alliance of CDU/CSU, SPD, and BSW, first formed in Thuringia in 2024; named under Germany's color-based coalition naming convention.
Blackbird Ventures (venture capital firm)
Blackbird Ventures is an Australian venture capital firm founded in 2012 by Rick Baker, Niki Scevak, and Bill Bartee, with over $3 billion invested across 190 companies.
Blackfeet Nation
The Blackfeet Nation, also known as the Blackfeet Tribe, is a federally recognized Indian tribe in northwestern Montana, one of the 10 largest in the United States.
BlackFin Capital Partners
BlackFin Capital Partners is a Paris-based, AMF-regulated investment firm founded in 2009, managing about €4 billion across buyouts of asset-light financial-services firms and venture stakes in European fintech.
Blackfoot Confederacy
The Blackfoot Confederacy (Siksikaitsitapi, Niitsitapi) is a group of four Blackfoot-speaking nations: Siksika, Kainai (Blood), Piikani in Alberta, and Aamskapi Pikuni (Blackfeet) in Montana, signatories of Treaty 7 (1877) and united since the 2000 Declaration.
Blackfoot language
Blackfoot (Niitsi'powahsin, Siksikai'powahsini) is the westernmost Algonquian language, spoken in southern Alberta and northern Montana; polysynthetic, severely endangered, with active community revitalization programs.
Blackhorn Ventures Industrial Impact
Blackhorn Ventures Industrial Impact is the fund family of Blackhorn Ventures, a Denver, Colorado venture capital firm founded in 2017 that backs Series Seed and Series A industrial software companies.
Blackjack
Blackjack, also called Twenty-One (Vingt-et-Un), is a casino banking card game against the dealer. Basic strategy cuts the house edge to about 0.5%; card counting can give players a 0.5-1.5% advantage.
Blackletter
Blackletter, also called Gothic script or Old English, is the family of dense, broken-pen scripts and typefaces from twelfth-century Europe, subdividing into textura, rotunda, schwabacher, and fraktur; it set Gutenberg's 1455 Bible and remained German printing's standard until a 1941 ban.
BlackLine
BlackLine is an American cloud software company, founded in 2001 by Therese Tucker and headquartered in Woodland Hills, California, that automates the financial close and account reconciliation for corporate finance departments.
Blacklisting
Blacklisting: systematic denial of employment via lists of politically or union-troublesome people; also called black list. Spans 1880s US labor blacklists, AGLOSO, the Hollywood blacklist, and UK construction blacklisting.
Blackmail
Blackmail: threatening to expose damaging information unless a demand for money, property, or action is met; a form of extortion. Illegal in all US states and federally (18 USC 873), and under the UK Theft Act 1968 s.21 (max 14 years).
Blackout (broadcasting)
Blackout (broadcasting): a geographic restriction preventing a TV or streaming service from showing a program, usually a live sports event, to protect exclusive rights holders or ticket sales. Covers the US Sports Broadcasting Act of 1961, the FCC's 1975 rule repealed in 2014, the NFL sellout rule, regional sports network blackouts, and the UK's UEFA Article 48 3pm blackout.
Blackout Tuesday
Blackout Tuesday, June 2, 2020, a music-industry protest from #TheShowMustBePaused by Jamila Thomas and Brianna Agyemang; black Instagram squares tagged #BlackLivesMatter drowned out activist information.
BlackRock
BlackRock is an American investment management firm, the world's largest asset manager, founded by Larry Fink in 1988 with $11.6 trillion under management by the end of 2024.
Blackrock College
Blackrock College ("the Rock"), founded 1860 by the Holy Ghost Fathers as the French College, is a fee-paying Catholic boys' day and boarding secondary school in Blackrock, Dublin, part of a Willow Park campus with over 1,600 boys.
Blackshirts
Blackshirts (camicie nere, squadristi) were Italian Fascism's paramilitary squads, formed from 1919, legalized in 1923 as the MVSN militia under Mussolini, and dissolved in 1943.
Blackstone
Blackstone Inc. is an American alternative asset manager founded in 1985 by Stephen Schwarzman and Peter Peterson, today the world's largest with over $1.3 trillion in assets.
Blackstone Inc.
Blackstone Inc., formerly The Blackstone Group, is an American alternative asset manager headquartered in New York, reporting more than $1.3 trillion in assets under management in 2025.
Blackstone Real Estate Partners
Blackstone Real Estate Partners is the series of opportunistic real estate private equity funds managed by Blackstone Inc., including the record $30.4 billion BREP X fund.