In the wake of million-dollar scandals brought about by Michael Milken, Ivan Boesky, and their like, Wall Street seems like the province of rampant individualism operating at the outermost extremes of self-interest and greed. But this, Mitchel Abolafia suggests, would be a case of missing the real culture of the Street for the characters who dominate the financial news.

Making Markets, an ethnography of Wall Street culture, offers a more complex picture of how the market and its denizens work. Not merely masses of individuals striving independently, markets appear here as...