PB Fintech shares plummeted 36% on Thursday, marking their largest single-day decline since their November 2021 debut, after India's insurance regulator, IRDAI, proposed stricter limits on commissions and management expenses for insurers. This sell-off wiped out approximately $3.78 billion (₹31,426 crore) from PB Fintech’s market capitalization in one session. This amount surpassed the company's cumulative revenue of approximately $2.56 billion (₹21,342 crore) over the previous eight years. By the end of FY26, PB Fintech had reported a net profit of $80 million (₹670 crore), though its retained earnings remained negative at $159 million (₹1,325 crore).

The proposed IRDAI changes, which include commission cuts of as much as one-half to two-thirds in health, term, and motor insurance, aim to curb distribution costs and instill greater industry discipline. Analysts from Jefferies noted that a 10% cut in new-business commission rates could lead to a 10-12% fall in earnings for companies like PB Fintech and Turtlemint Fintech Solutions. Some analysts predict the proposals could reduce insurance fee income for banks and digital brokers by up to 90% in high-margin categories, with implementation expected from FY28.

The market impact extended beyond PB Fintech, with 18 insurance companies, distributors, and lenders collectively shedding approximately $18.5 billion (₹1.54 lakh crore) in market value. Turtlemint Fintech Solutions fell 20%, while Max Financial Services and L&T Finance declined about 10% each. Bajaj Finance lost $4.58 billion (₹38,103 crore), and HDFC Bank and Axis Bank saw $1.55 billion (₹12,873 crore) and $2.12 billion (₹17,654 crore) wiped off their market capitalizations, respectively. Even banks with significant bancassurance income, like IndusInd Bank and IDFC First Bank, saw their shares fall about 5%.

Despite the significant market reaction, some analysts like Jefferies India and Motilal Oswal Financial Services have kept their FY27 and FY28 earnings estimates for PB Fintech unchanged, anticipating that the consultation paper may undergo revisions before finalization in October, and implementation is not expected until FY28. However, they have reduced their target prices for PB Fintech by 25% and 37% to $185 (₹1,540) and $138 (₹1,150) respectively, due to a derating in valuation multiples. The sudden plunge in PB Fintech's stock also created extreme volatility, leading to extraordinary gains for some options traders; for example, a deeply out-of-the-money put option reportedly yielded an 87,366.7% return, turning a $1.26 (₹105) investment into over $1,100 (₹91,840).

PB Fintech's management acknowledged the immediate impact as "quite extreme" but considered the stock erosion overblown. While the company's life and non-life insurance businesses are split equally in terms of revenue, a greater impact is anticipated on the non-life segment. The company also anticipates a potential 15-20% increase in volumes if general insurance commissions fall 60%, provided insurers pass on savings to customers, which could mitigate some of the revenue loss.