Martingale theory’s prestige drew pure mathematicians into finance by 1990

Evidence

However, “the martingale stuff brought the hypermathematicians in” (Ross interview). Building on the work done by Black, Scholes, and Merton, other theorists Sharpe, Cox, Ross, Rubinstein, and especially Harrison and Kreps had constructed a bridge between financial economics and martingale theory, an advanced, high-prestige area of pure mathematics. Things that probability theorists within pure mathematics knew about-measure-theoretic notions of probability, the Radon-Nikodym theorem, the martingale representation theorem, the martingale convergence theorem, the Girsanov theorem became relevant to finance. “There’s this whole literature on martingales and stochastic processes so people doing that suddenly said `yeah, I can get a job on Wall Street.’ That’s what brought them all into it.” (Ross interview) By the 1990s, it had become possible for probability theorists to teach courses that were both rigorous by the standards of pure mathematics and attractive to students looking forward to well-paid jobs in finance. — Donald MacKenzie, An Engine, Not a Camera, 623

Categorization

• XREF: This is a concrete instance of the performativity thesis’s personnel channel: the supply of skilled model-builders shaped the models that then built markets. — connects to: Finance scholarship rose from business-school marginality to Nobel-level prominence by the 1990s; Finance theorists valued tractable, non-obvious models over practically useful ones. — Donald MacKenzie, An Engine, Not a Camera: How Financial…, 1098
• SEED: Angle: how a field’s internal reward structure (pure-math prestige) redirects talent into finance — a sociology-of-knowledge story about the ‘hypermathematician’ migration.

Broader Connections

• Finance scholarship rose from business-school marginality to Nobel-level prominence by the 1990s #corroborates (0.78)
• Finance theorists valued tractable, non-obvious models over practically useful ones. #expands (0.75) — Donald MacKenzie, An Engine, Not a Camera, 1098