HDFC Bank: Brokerages say 'buy' despite chairman exit, see up to 55% upside

• Brokerages maintain 'buy' ratings on HDFC Bank stock, projecting up to 55% upside.
• Stock fell 5.1% after part-time chairman Atanu Chakraborty's resignation citing 'values and ethics'.
• Jefferies maintains 'buy' with a target of Rs 1,240, seeing 55% upside, citing no compromise on governance.
• Motilal Oswal reiterates 'buy' with a target of Rs 1,100, implying 38% upside, noting RBI's endorsement of governance.
• Keki Mistry's interim chairman appointment and RBI's clarification on no material concerns provide comfort.