Mumbai—India's effort to cool a speculative frenzy in equity derivatives has inadvertently ignited a different kind of fire: a surge in margin loans that regulators now watch with caution. As authorities tighten rules on options trading, a wave of young retail investors—many under 35—is shifting to broker-financed stock bets, pushing leverage to an all-time high of about $15 billion. Main Developments Margin trading facility (MTF) leverage across India has reached roughly $15 billion, a 50% year-on-year increase, exchange data shows. Though a fraction of the $602.9 billion cash equity market, it now equals about a day's turnover. HDFC Securities, one of the top three MTF brokers, has seen its credit extended more than double over 15 months. Ishan Tanna, a 26-year-old Mumbai banker, exemplifies the shift. He used to sell options but now borrows from brokers to amplify returns on swing trades, using MTF to buy shares on credit and pledge them for more. Brokers charge 9–18% for such funding, with top firms planning further rate cuts to attract clients, according to two market sources. Read also: Why Copper Prices Are Surging on Chinese Demand and Middle East Hopes Retail traders are piling into beaten-down sectors. Tata Consultancy Services, Infosys, and HDFC Bank—all heavily sold by foreign investors—are the most bought stocks via MTF, per exchange data. Siddhartha Gadhwal, a 29-year-old startup founder, plans to combine 300,000 rupees of his own money with leverage to build a 2 million rupee position on IT stocks, betting on a recovery. Background India is home to more than 130 million retail stock traders with a median age of 32. Their appetite for high-risk bets had fueled an options trading boom that raised financial stability concerns, prompting the Securities and Exchange Board of India (SEBI) to tighten derivatives rules. SEBI has prioritized deepening cash equities while nudging traders away from derivatives. The regulator has proposed widening funding avenues for leveraged cash trades and is considering allowing more instruments as collateral, internal documents reviewed by Reuters show. However, SEBI remains wary of excess leverage. In May, it rejected a proposal from broker bodies to reduce collateral requirements, stating that “initial margins collected by brokers from clients prevent excessive leverage and avoid systemic risk buildup.” Globally, deeply leveraged retail investing has sparked alarm elsewhere. South Korean regulators have moved to cool speculative fever, drawing parallels to India's MTF boom. “Parallels of India’s MTF boom with South Korea lies in the fintech-driven democratization of debt and the ‘fear of missing out’ that plagued retail investors in both markets,” said Manishi Raychaudhuri, founder and CEO of Emmer Capital Partners. Why It Matters Margin trading enhances profits but inflates losses, especially during volatile periods. “Particularly during times of enhanced volatility in the market, margin trading raises the market’s volatility further,” Raychaudhuri warned. The contrarian bets on IT stocks, which have dropped over 30% this year, could be the first test of whether growing margin trades amplify market swings. Though options still offer far higher leverage—allowing large positions with little upfront capital—margin trading is expected to be among the fastest-growing segments. Kotak Securities, the second-largest MTF broker, expects MTF to grow at a compounded annual rate of 20–25%, while derivatives growth slows to about 10%. What's Next SEBI has not responded to requests for comment on expanding the segment or whether it sees emerging risks. Broker top firms plan to reduce funding rates to attract more clients, which could further accelerate MTF growth. The regulator's next moves—whether to broaden funding avenues or tighten collateral requirements—will shape how the boom evolves. For traders like Gadhwal, the bet on IT services recovery will test whether retail investors can withstand the risks of doubling down with borrowed money. The outcome may influence SEBI's approach to managing leverage in India's increasingly youthful and speculative market.