In 1973, Robert C. Merton published “Theory of Rational Option Pricing,” which developed option valuation using no-arbitrage reasoning (prices should not allow riskless profit). The paper extended and generalized ideas closely related to Black–Scholes, including handling dividends and contract features. Together, these works strengthened the theoretical basis for practical options valuation.
In 1973, the Options Clearing Corporation (OCC) was founded to provide centralized clearing for listed options. A clearinghouse acts as the buyer to every seller and the seller to every buyer, helping manage counterparty risk (the risk one side cannot pay). OCC’s role supported growth in listed options by making settlement more reliable and scalable.
On February 1, 1973, the U.S. Securities and Exchange Commission issued Release No. 34-9985, establishing the first exchange pilot program for standardized options trading. This regulatory step helped set conditions for exchange trading of options and investor protections. It also provided a framework other exchanges later used when they began listing standardized options.
On April 26, 1973, the Chicago Board Options Exchange (CBOE) began trading standardized, exchange-listed stock options. Standardization (common contract terms and centralized trading) helped move U.S. equity options from a fragmented over-the-counter market toward a more transparent marketplace. This opening is often treated as the start of the modern U.S. listed options industry.
In May–June 1973, Fischer Black and Myron Scholes published a model for pricing European-style stock options and related corporate liabilities. The paper showed how an option’s value could be linked to the stock price, time to expiration, interest rates, and expected volatility. This research gave markets a widely usable framework for quoting and comparing option prices.
In 1977, the SEC imposed a moratorium on further expansion of options listings while it reviewed market structure and regulation. The pause reflected concerns about surveillance, investor protection, and operational capacity as the new options markets grew. The moratorium ended on March 26, 1980, allowing exchanges to expand listings again.
In June 1977, the SEC permitted the addition of put options to exchange trading. Puts gave investors a standardized way to hedge downside risk or take bearish views, complementing call options that benefit from price increases. This broadened the usefulness of listed options for risk management and trading strategies.
In 1979, Cox, Ross, and Rubinstein published a simplified “binomial” approach to option pricing. The method values options by modeling the stock price moving up or down in small steps and using a replicating portfolio (a stock-and-cash mix that matches the option payoff). It became a practical numerical technique, especially useful for American options that can be exercised early.
On March 11, 1983, CBOE introduced the first broad-based stock index options, originally on the CBOE 100 Index (later associated with the S&P 100 and the OEX ticker). Index options let traders hedge or express a view on the overall market in one contract, rather than managing many individual stock options. This helped expand options from single-stock tools into portfolio-level risk management instruments.
On July 1, 1983, CBOE began listing options on the S&P 500 Index (SPX). Because the S&P 500 is widely used as a benchmark for U.S. equities, SPX options became a key tool for institutional hedging and portfolio management. Over time, SPX options grew into one of the most actively used U.S. index options markets.
In 1985, Cox, Ingersoll, and Ross published a model of the term structure of interest rates (how yields vary by maturity). Interest-rate modeling mattered for options pricing because many derivatives depend on discount rates and the future path of rates, especially bond and interest-rate derivatives. This work helped link derivatives pricing to more detailed models of interest-rate movements.
On January 19, 1993, CBOE announced real-time reporting of the CBOE Market Volatility Index (VIX), developed with finance professor Robert E. Whaley. The original VIX used S&P 100 (OEX) option prices to estimate the market’s expected 30-day volatility (implied volatility). This milestone showed how options prices could be turned into a widely followed market indicator, reinforcing options’ role in measuring and managing risk.
Evolution of Options Pricing Theory and Market Adoption (1973-1990)