Seems to just mean 30 days of average outflows, i.e. a bank should be ok for that long without any money coming in via new deposits, loan repayments, etc. Of course the issue is when you have larger-than-average withdrawals...
Probably doesn’t help that this is very a niche bank. Lots of orgs running their payroll from this bank, but few retail account holders.
At a typical community/regional bank, payday is just a bunch of bill entries: debit the corp account and credit the employees accounts. Meanwhile a business-focussed bank will just have huge debits every Friday without corresponding credits: those are happening at other banks.
And with a small number of account holders, it doesn’t take many actors to cause an a bank run.
All institutional investors take their money back as soon as they are legally allowed, no new financing available, and for other clients, assumptions are made, calibrated by the regulator on previous bank runs. And you net that with the bank getting its money back as soon as available (with a limit on the netting between inflows and outflows at 75% of outflows).
Undoubtedly it is a dry bureaucratic definition like “A 30 day period where on each day capital outflows were greater than inflows by a factor of 10”, of course in the definition failing to capture what an _actual_ bank run is.
https://www.investopedia.com/terms/l/liquidity-coverage-rati...