Yes Bank warned the AT-1 ruling could cut its core capital ratio by 250 basis points

What's going on here?

On 17 October 2026, Yes Bank Ltd told stock exchanges that its Common Equity Tier 1 capital ratio could fall by roughly 250 basis points once it reflects the Supreme Court’s decision on additional tier-1 bonds. The court on 15 October dismissed appeals by the bank, the Reserve Bank of India, and the Union government, upholding the Bombay High Court’s quashing of the March 2020 write-off of ₹8,415 crore of AT-1 instruments. Yes Bank said it is studying the judgment and will update investors on accounting and payout timing. In the same filing it said overall tier-1 capital could remain near 14% on a pro forma basis even as the equity-quality buffer takes the hit.

What does this mean?

Regulators watch CET1 because it is the first cushion against losses on loans and trading books. AT-1 bonds count as tier-1 capital when they stay on the books, but restoring them after a court order can pull equity ratios down if the bank must treat the liability differently from the 2020 reconstruction plan. Yes Bank’s numbers give shareholders a scale for the bill: not necessarily a breach of minimum rules, but less room to grow risk-weighted assets or pay dividends until capital is rebuilt. Mutual funds that held the bonds may see a path to coupons again, while equity investors price a slower recovery of return on equity.

Why should I care?

If you own Yes Bank shares or bank-sector funds, read the next exchange updates on how the lender books the restored bonds and whether it plans a capital raise. AT-1 fund holders should track record dates and coupon reinstatement. Other private banks are not directly affected, but treasury teams will watch whether the RBI issues fresh guidance on loss-absorption language in future rescues. Follow the detailed court order on interest, any RBI supervisory response, and Yes Bank’s quarterly capital disclosure once the accounting is final.