How Jews built modern finance — then got blamed for it

In 2009, the Anti-Defamation League found that 31 percent of Europeans blamed Jews for the global financial crisis. They were blaming the wrong Jews for the wrong thing.

The scholars who actually built the intellectual machinery of modern finance — portfolio theory, capital structure, options pricing, behavioral economics — were overwhelmingly Jewish. But they did not manipulate markets. They made markets legible. They published their work in journals anyone could read. They taught it in classrooms anyone could enter. They handed the world a set of tools for reasoning under uncertainty, and the world used those tools to build a financial system worth hundreds of trillions of dollars — then turned around and blamed Jews when it broke.

That opening paradox deserves unpacking, because in February 2026, the American Jewish Committee reported that 91% of American Jews feel less safe as a result of violent antisemitic attacks over the past year — the arson at a Jewish governor’s residence, the firebombing of a pro-hostage march in Boulder, the murders outside the Capital Jewish Museum. Antisemitic incidents in the United States have reached their highest recorded level. And economic antisemitism — the oldest variant, the one that predates even the blood libel — is flourishing. It flourishes partly because the actual intellectual record has never been clearly told.

The Equation Makers

The story begins in 1952, when Harry Markowitz, a son of Chicago grocers, published a 15-page paper showing how to balance risk against return across a portfolio of assets. Mean-variance optimization did not make Markowitz wealthy. It made the world’s pension funds, endowments, and sovereign wealth funds rational. Every institutional portfolio on earth descends from that paper. He waited 38 years for the Nobel Prize in economics.

Two decades later, Myron Scholes and Robert C. Merton — extending insights Paul Samuelson had seeded at MIT — derived the Black-Scholes-Merton formula for pricing options. The global derivatives market now exceeds several hundred trillion dollars in notional value. Every contract traded on every exchange on every continent owes its pricing logic to their equation. They did not hoard an advantage; they eliminated informational asymmetry, making fair pricing simultaneously available to every participant in the market.

Kenneth Arrow’s general equilibrium work provided the theoretical scaffolding for contingent claims. Daniel Kahneman then did something remarkable: he used behavioral psychology to dismantle the rational-agent assumptions on which the entire edifice rested, exposing the cognitive biases that make real markets deviate from elegant models. The Jewish contribution did not merely build the cathedral of modern finance. It supplied the most penetrating critique of its own foundations.

There is a deeper irony still. Robert C. Merton’s father, Robert K. Merton — born Meyer Schkolnick to Eastern European Jewish immigrants in Philadelphia — was one of the 20th century’s most influential sociologists. Among his many contributions, the elder Merton coined the term “self-fulfilling prophecy” in 1948, illustrating it with the parable of a bank run: a false rumor of insolvency triggers a rush of withdrawals that makes the bank actually insolvent. The prediction creates the reality it predicted.

Half a century later, his son’s equation met the same dynamic. In 1994, Scholes and the younger Merton joined Long-Term Capital Management, a hedge fund that deployed the Black-Scholes-Merton framework with extraordinary leverage. LTCM generated annualised returns above 40 per cent in its best years — until the Russian financial crisis of 1998 froze the markets the model assumed would remain liquid. When every sophisticated player was hedging with the same equation, their correlated positions created exactly the systemic fragility the model could not price. LTCM lost $4.6 billion in under four months and required a Federal Reserve-brokered bailout to prevent contagion across global markets.

The father had described the mechanism; the son lived it. A model adopted universally ceases to be a neutral description and becomes a force that reshapes the system it models — a self-fulfilling prophecy in reverse. That two generations of the same intellectual family produced both the diagnosis and the most spectacular instance of the disease is not an indictment. It is a testament to a tradition willing to build the tools and confront their limits.

Nine Butchers and a Piece of Meat

What produced this extraordinary concentration? The answer lies deeper than sociology, and further back than the 20th century.

The Talmud contains a problem that anticipates modern probability theory by 15 centuries. A city has ten butchers: nine kosher, one not. If you find a piece of meat in the street, the rabbis rule it kosher — follow the majority. The probability is 90%, and the meat is deemed definitively kosher, not merely “probably” so. But if you bought meat and forgot which shop you visited, the same 90 per cent does not apply. The Talmud treats the purchase as a fixed event — kavu’a — generating two equally weighted possibilities: either you bought kosher or you did not.

This is not primitive arithmetic. It is a distinction between what modern statisticians would recognize as sampling from a distribution versus conditioning on a fixed but unknown state — a distinction that maps onto the frequentist-Bayesian debate Western mathematics would not formalize until the 20th century.

Now transpose this habit of mind to the problem Markowitz faced: given uncertain returns across n assets, how should a rational agent allocate capital? Or to the problem Scholes and Merton confronted: given stochastic price movements, what is the fair value of a contingent claim? These are Talmudic questions dressed in stochastic calculus. The underlying discipline — adjudicating value when the answer depends not just on the numbers but on the structure of what you know and do not know — was cultivated in the yeshiva long before it reached the trading floor.

The diaspora reinforced this orientation with brutal efficiency. When physical assets could be confiscated and communities expelled — as they were, repeatedly, across centuries and continents — the capacity to reason abstractly about value, risk, and exchange became existential. Option pricing theory, in this light, is the formalization of survival strategies refined over two millennia.

The Inversion

Economic antisemitism takes this record and performs a precise inversion. It observes Jewish prominence in finance and concludes: conspiracy. The actual record demonstrates the opposite. Markowitz did not corner a market; he showed any investor, anywhere, how to diversify risk. The Black-Scholes-Merton formula did not create informational asymmetry; it destroyed it. These contributions democratised financial knowledge. They were acts of radical transparency.

When nearly a third of Europeans blamed Jews for the 2008 crisis, they were not performing a sober analysis of collateralised debt obligations and credit default swaps. They were reaching for an explanatory template older than modern finance itself — the template of the Protocols, of medieval usury prohibitions, of expulsion edicts justified by the fiction that Jewish lenders were parasites rather than participants. Economic antisemitism does not respond to evidence because it was never generated by evidence.

The irony is savage. The very tools that might have prevented the 2008 catastrophe — proper risk modelling, rational portfolio diversification, transparent derivatives pricing — were the tools Jewish scholars had built and published decades earlier. The people blamed for the crisis had already given the world the mathematics to avert it.

A Living Inheritance

This intellectual tradition is not merely historical. Israel today is home to 512 active fintech companies — one of the densest concentrations of financial technology innovation on earth. The line from Markowitz’s Chicago apartment to the trading algorithms running out of Tel Aviv is unbroken. And as a scholar who applies Black-Scholes-Merton to the valuation of alliance commitments under geopolitical uncertainty, I can attest that the tools have traveled far beyond finance entirely. Real options theory now informs how defence establishments and foreign policy institutes assess whether states will honor, delay, or abandon strategic commitments. The mathematics of contingent claims prices not only stock options but the credibility of alliances in a fragmenting world order.

This is the legacy that antisemitic caricature works to obscure. The Jewish contribution to financial theory was never about money. It was about building a formal language for seeing clearly when the future is dark — the same project the Talmudic rabbis began when they debated nine butchers and a piece of meat found in the street.

The Nobel record does not document a conspiracy. It documents one of the great intellectual achievements of the 20th century. Failing to say so clearly — especially now, when the old libels are once again in circulation — is not politeness. It is negligence.