On Thursday, September 24, the SENSEX fell 1,247.71 points or 1.67% to close at 73,580.54, while the NIFTY50 ended at 23,063.10, down 383.70 points or 1.64%. The decline was driven by a surge in crude oil prices and rising U.S. bond yields, which pushed the benchmark indices into deep red. The SENSEX tumbled as much as 1.7% to an intraday low of 73,563.92, and the NIFTY50 crashed 1.71% to touch the session’s low of 23,046.15. The volatility gauge, India VIX, surged as much as 28% to an intraday high of 13.22.

A significant contributor to the market sell‑off was a proposed regulatory change by the Insurance Regulatory and Development Authority of India (IRDAI). The authority issued a consultation paper titled ‘Recalibrating Economics of Insurance Distribution’, which outlines reforms covering insurance distribution, structure, expenses, commissions, market conduct, transparency and digital infrastructure. The paper proposes bringing back hard, product‑level caps on life insurance commissions, a reversal of limits removed in 2023. Insurers will also face changes to their Expense of Management (EoM) limits and commission structures.

The IRDAI proposal weighed heavily on HDFC Life Insurance Company shares, which closed 6.16% lower, making it the biggest loser on the NIFTY50. Other top losers included Bajaj Finance at –5.87%, Axis Bank at –4.56%, Bajaj Finserv at –4.56% and Adani Enterprises at –3.11%. The regulatory move also triggered a sharp decline in PB Fintech, whose shares fell 36%, wiping out over ₹25,000 crore from its market capitalisation. Bernstein analysts noted that the proposed commission cuts were significantly more severe than expected and could materially pressure PB Fintech’s unit economics, particularly in health and motor insurance.

Among the NIFTY50’s top gainers were Cipla, which rose 1.16%, Oil & Natural Gas Corporation (ONGC) up 0.89% and NTPC Ltd up 0.18%. In the NIFTY Midcap 100, the index declined 2.25% to close at 60,990.15. The top laggards were Max Financial Services at –9.78%, L&T Finance at –9.03%, Info Edge (India) at –5.63% and AU Small Finance Bank at –5.03%. The top winners in the Midcap 100 included ICICI Lombard General Insurance Company at 5.09%, Oil India Ltd at 1.91%, Multi‑Commodity Exchange of India at 1.59%, Mankind Pharma at 1.42% and Dixon Technologies at 0.75%.

The NIFTY Smallcap 100 index also slipped, falling 1.53% or 306.75 points to end at 19,684.75. The largest losers were IFCI Ltd at –5.33%, Piramal Finance at –5.05%, Five‑Star Business Finance at –4.49%, Bandhan Bank at –4.43% and Pine Labs at –4.41%. Conversely, the top gainers were Signature Global at 2.05%, Redington at 1.81%, Dr. Lal Path Labs at 1.70%, Kaynes Technology India at 1.49% and Himadri Speciality Chemical Ltd (HSCL) at 1.46%.

The day’s volatility, heightened by the crude oil surge, U.S. bond yield rise, and the IRDAI commission proposal, left the market in a state of caution. Investors reacted to the potential impact of the proposed commission and distribution‑cost changes on insurance distribution stocks, leading to significant sell‑offs across the financial sector. The sharp decline in PB Fintech and other insurers underscored the market’s sensitivity to regulatory shifts, while the modest gains in a handful of companies reflected selective optimism amid broader uncertainty.