RBI Derivatives Curbs Reshape F&O Market Structure

RBI Derivatives Curbs Hit F&O Volumes Hard India's F&O market is contracting — and it's not a cyclical dip. The RBI's tightening of bank funding lines to proprietary trading desks, combined with stricter margin requirements enforced through Q1 2025, has knocked speculative index derivative volumes down sharply. Proprietary desk activity, which at peak accounted for roughly 15-18% of daily NSE index derivative turnover, has pulled back materially as banks face constraints on capital deployed toward in-house trading operations. This isn't a temporary squeeze. The structural intent is clear: reduce systemic risk embedded in leveraged speculative positions that amplified volatility during drawdowns in late 2023 and mid-2024. Simultaneously, SEBI's revised mutual fund expense ratio framework — tightening total expense ratios across equity schemes and compressing trail commissions paid to distributors — is cutting into the economics of smaller distribution intermediaries. For context, distributor trail income on equity AUM was already running thin at 40-60 bps for many mid-tier players; the revised caps could push effective payouts another 8-12 bps lower depending on scheme category. Taken together, these two regulatory shifts are hitting market intermediaries on both the trading and distribution sides in the same quarter. The short-term read is unambiguously negative for brokers and wealth platforms that depend on F&O volume-linked revenues. The longer-term case, however, is that a market with lower speculative noise and better cost efficiency for end investors is one that attracts stickier, higher-quality capital. That's the trade-off regulators are explicitly making. Sector Impact: Brokers and Wealth Managers in the Crosshairs [ANGELONE](/stock/ANGELONE) (NSE: ANGELONE) is the most directly exposed name here. Angel One's revenue mix skews heavily toward F&O order flow — in FY24, derivatives accounted for over 60% of total broking revenue by some internal estimates...