The U.S. options market set a new monthly volume record in March, with 1.24 billion contracts changing hands across all exchanges—a 22% increase over the same month last year and the seventh consecutive month of year-over-year growth. But the most striking feature of the boom isn't its size. It's who is driving it.
According to data from the Options Clearing Corporation and analysis by Piper Sandler, retail investors now account for approximately 45% of total single-stock options volume, up from 28% in 2020 and less than 15% a decade ago. The shift has been accelerated by zero-commission trading platforms, the proliferation of options-focused educational content on social media, and the introduction of zero-days-to-expiration (0DTE) contracts that allow traders to make leveraged bets on intraday market moves.
"This is the single biggest structural change in U.S. equity market microstructure in the last twenty years," said Dr. Robert Kowalski, a professor of finance at NYU's Stern School of Business who studies market structure. "Retail participation at this level changes how prices form, how volatility behaves, and how institutional players construct their hedging strategies."
"Zero-DTE options have turned the options market into the sports betting of finance. The volume is real, the leverage is enormous, and the risk is not well understood by most participants."— Dr. Robert Kowalski, Professor of Finance, NYU Stern
The rise of 0DTE contracts has been particularly dramatic. These ultra-short-duration options, which expire on the same day they are traded, now represent more than 40% of all S&P 500 options volume, up from roughly 5% in early 2022. The Cboe Global Markets exchange, which introduced daily expirations for S&P 500 options in 2022, has seen its options revenue grow 34% over the past year, driven almost entirely by the 0DTE category.
Robinhood, which remains the largest brokerage by number of funded accounts, reported that options trading volume on its platform rose 48% year-over-year in Q4 2025. The company recently introduced a suite of analytics tools designed to help traders understand the Greeks—delta, gamma, theta, and vega—before placing trades, a move that came after sustained pressure from regulators and consumer advocacy groups.
The regulatory response has been measured but pointed. SEC Chair Caroline Crenshaw said in testimony before the Senate Banking Committee earlier this month that the Commission is "closely monitoring the growth of retail options activity, particularly in zero-day contracts, to assess whether existing investor protections are sufficient." She stopped short of calling for new restrictions but indicated that updated suitability requirements for brokerages could come later this year.
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Market makers and institutional traders have had to adapt. Citadel Securities, which handles a significant share of retail order flow, has invested heavily in infrastructure to manage the speed and volume of 0DTE trading. The firm declined to comment specifically on retail volumes but noted in a recent white paper that "the democratization of options trading has created both opportunities and challenges for liquidity provision."
The implications extend beyond Wall Street. The advertising industry has taken notice of the retail trading boom as a cultural phenomenon with significant marketing budgets attached. Brokerage firms collectively spent an estimated $1.8 billion on advertising in 2025, according to MediaRadar, with Robinhood, Charles Schwab, and Interactive Brokers among the top spenders. Much of that spend has shifted to digital channels, particularly YouTube and TikTok, where finance influencers command audiences in the millions.
"Trading has become content," said Maya Richardson, an analyst at MoffettNathanson who covers the intersection of finance and media. "The brokerages understand that their customer acquisition funnel now runs through social media creators. That's fundamentally changed how they allocate their marketing budgets."
Whether the retail options boom represents a permanent shift in market structure or a cyclical phenomenon tied to a specific era of low interest rates and mobile-first investing remains an open question. But for now, the numbers keep climbing—and the rest of the market is learning to trade alongside a new class of participant that plays by a very different set of rules.