The Liquidity Coverage Ratio asks one question. If a severe stress ran for thirty days, would your high quality liquid assets cover the net cash you would lose over that window. Regulators want the answer to be yes, with room to spare.
The headline formula is short.
LCR = HQLA / Total net cash outflows over 30 days
The number you report is a ratio, and the minimum is one hundred percent. The interest is not in the formula. It is in how each part is built.
High quality liquid assets
HQLA is not simply your cash and gilts added together. Assets sit in levels, and the lower levels carry haircuts and caps. Level 1 is cash, central bank reserves and the highest grade sovereigns. Level 2 assets count too, but with a haircut and a cap on how much of the buffer they can make up.
A common error is treating the whole securities book as HQLA. Only assets that are unencumbered and genuinely saleable in a stress qualify. Anything pledged to a counterparty is out.
Net cash outflows
This is where the ratio really moves. You take gross outflows over the thirty day window, apply the prescribed run off rates, then subtract capped inflows. Retail deposits run off slowly. Unsecured wholesale funding runs off fast. Committed facilities you have given to clients count as outflows because they can be drawn when everyone is short.
The three places teams get it wrong are almost always the same. Encumbered assets counted as HQLA. Deposit classifications that are too generous, so the run off rates are too low. And inflows assumed at one hundred percent when the cap only lets you offset seventy five percent of outflows.
Why it matters on the desk
The LCR is not a reporting chore. It prices your funding. If short dated wholesale money is expensive in ratio terms, that cost belongs in your funds transfer pricing curve, which is what actually steers the balance sheet.
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