"As a result, some private sector banks, particularly, small institutions could lose deposits to PSBs, which will weaken their funding profiles," it added.
Moody's said the YES Bank episode places the country's financial system on "alert" and the rescue in itself "exposes weaknesses in the process to support a failing private sector bank".
"This case highlights that authorities will only rescue a private sector bank after imposing a moratorium, which effectively constitutes a default as it prevents the bank from making timely payments to its depositors and creditors, Alka Anbarasu, vice president and senior credit officer, said.