The additional Tier 1 bonds, popularly known as AT1 bonds, are back in the news in the wake of the Bombay High Court on Friday quashing Yes Bank’s write-off of AT1 bonds worth around Rs 8,400 crore, providing much-needed relief to investors. As part of its rescue plan for the ailing Bank, the Reserve Bank of India (RBI) in March 2020 wrote off the bank's loss-absorbing instruments.