For nearly three centuries, London split its market in two: brokers dealt with the public, and jobbers — wholesalers standing at pitches on the Exchange floor — quoted them two-way prices, never dealing with outside clients directly. Daniel Defoe was already denouncing "the villainy of stock-jobbers" in 1701. The Big Bang of 27 October 1986 abolished the broker–jobber separation overnight, and the trade vanished into the dealing desks of the banks that bought the old firms.
Stockjobber no longer exists as a living trade. Here is what erased it, and which profession took on the work.
1600 – 1860
Amsterdam, London and the age of bonds
The Dutch East India Company's shares gave Amsterdam the first modern capital market, complete with speculators, short sellers and crashes. Leadership passed to London in the 1700s, where merchant banks — Barings from 1762, the Rothschilds from the Napoleonic Wars — underwrote the government debt that funded a century of war and empire. The Duc de Richelieu is credited with the era's defining remark: that Europe's six great powers were Britain, France, Prussia, Austria, Russia and Baring Brothers.
What else was happening then
1815
Rothschild's information network beats the government
Nathan Mayer Rothschild learned of Wellington's victory at Waterloo roughly a day before the British government, via his family's private courier network, and informed the Treasury. The five Rothschild brothers, placed in London, Paris, Frankfurt, Vienna and Naples, went on to dominate European sovereign lending for half a century — the first truly multinational investment house.
1907
Morgan's library rescue
With no central bank in existence and New York's trust companies collapsing, 70-year-old J. Pierpont Morgan locked the city's leading bankers inside his private library on the night of 2 November 1907 until, at 4:45 a.m., they signed a $25 million rescue. Congress decided no private citizen should hold that power again and created the Federal Reserve in 1913.
1933
Glass–Steagall splits the Street
After the Pecora hearings exposed 1920s underwriting abuses, the Glass–Steagall Act forced American banks to choose between deposits and securities. J.P. Morgan & Co. chose commercial banking, and in 1935 a group of its partners left to found Morgan Stanley — the moment "investment bank" became a distinct legal species that lasted 66 years.
1963
Warburg invents the Eurobond
S. G. Warburg & Co. lead-managed a $15 million bond for Autostrade, Italy's state motorway operator — issued outside any single country's system, listed in Luxembourg and structured to sidestep both British stamp duty and America's new interest-equalization tax. The offshore capital market it opened now measures in the trillions of dollars.
Where that work lives now
The dealmaker who prices companies and moves capital — a trade running from Medici Florence to today's pitch decks, paid for trust when billions change hands.
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