Lombard lending when rates fall: the case for patient leverage

What leverage is actually for

Borrowing against a portfolio does one of three honest things. It bridges a timing mismatch, allowing a client to meet a near-term obligation, a tax bill, a property completion, a capital call, without selling assets at an inconvenient moment and crystallising gains or losses. It funds an investment expected to earn more than the loan costs, the classic positive-carry case. Or it provides committed liquidity that sits unused as insurance, valued for optionality rather than for deployment.

The first use is the least controversial and the most common in a private-bank context. A family with a concentrated, low-basis equity holding and a EUR 2m liquidity need has a genuine choice: realise the position and pay tax on the embedded gain, or draw a Lombard line at, say, 4 percent and repay it from the next dividend, bonus or asset sale. If the holding is to be retained anyway, the loan is plainly the cheaper instrument. The interest is a fraction of the avoided tax, and the position compounds undisturbed.

The second use, positive carry, is where discipline matters most. Borrowing at 4 percent to buy a bond yielding 5 percent looks attractive, but the 100 basis points of gross carry must absorb the credit risk of the bond, the mark-to-market risk of both legs, and the chance that the funding cost rises while the asset yield is fixed. The honest question is not whether the spread is positive today, but whether it survives a reasonable adverse move in rates and credit.

Where it quietly erodes value

Leverage erodes value in ways that do not announce themselves. The first is amplification of an already-expensive book. Adding borrowed exposure to a portfolio bought near the top of a cycle does not improve the entry price; it multiplies a poor one. The arithmetic of leverage is symmetric in gross terms but asymmetric in lived experience, because a forced sale near the bottom converts a temporary drawdown into a permanent loss.

The second is substitution for cash discipline. A Lombard line can become a way to avoid the mild discomfort of holding liquidity, funding consumption or commitments that ought to have been pre-funded. Here the loan does not bridge a mismatch; it manufactures one, and the interest is a pure cost with no offsetting return. The facility that began as a convenience becomes a standing short position in the client's own balance sheet.

The third, and most dangerous, is the margin-call dynamic. Lending value is not market value: a balanced portfolio might be advanced at 60 to 70 percent, a single concentrated equity at 40 percent or less. When markets fall, both the drawn amount and the collateral move against the borrower, and the bank's right to demand top-up or to liquidate is contractual, not discretionary. A client who treated a 70 percent advance as comfortable in calm markets can find that a 25 percent drawdown breaches the limit and forces selling into weakness, the exact outcome the loan was meant to avoid.

The buffer, not the rate, is the decision variable

Clients fixate on the interest rate because it is the visible number. The variable that actually determines whether a Lombard facility is sound is the buffer between the drawn amount and the lending value of the collateral. A loan at 4 percent against 40 percent of a diversified portfolio is a fundamentally safer instrument than the same loan at 3.5 percent against 70 percent, and the half-point saving is irrelevant if the larger advance forces a liquidation.

A simple stress frame clarifies this. Take a balanced portfolio with a lending value of 65 percent of market value and assume a peak-to-trough fall of 30 percent in a severe but not extreme episode. A client drawn to 40 percent of market value sees borrowings rise to roughly 88 percent of the now-reduced lending value, uncomfortable but survivable. A client drawn to 55 percent sees that ratio move past 120 percent, a clear breach requiring immediate top-up or sale. The difference between a manageable position and a forced one is the buffer chosen at outset, not the rate negotiated.

This reframes the whole exercise. The right question at origination is not how much can I borrow, but how much can I borrow and still hold through a 30 percent fall without the bank intervening. Sizing the facility to survive the drawdown, rather than to maximise the draw, is what separates leverage that compounds value from leverage that destroys it.

The case against, taken seriously

The strongest counter-argument is that the unleveraged client is never forced to sell at the bottom, never receives a margin call, and never converts a paper loss into a realised one. That is not a trivial advantage. The experience of 2008 and 2020 confirms that the single most destructive act in a private portfolio is selling under duress, and leverage raises the probability of exactly that act. A client who knows they would not hold a leveraged position calmly through a sharp drawdown should not hold one at all.

There is also a fee-and-incentive critique worth naming plainly. A bank earns net interest margin on every euro lent, so there is an institutional bias toward encouraging credit. We do not pretend otherwise. The defence is that disciplined Lombard lending, sized conservatively and used for genuine timing or carry purposes, demonstrably serves the client; abused Lombard lending does not, and it tends to end the relationship rather than deepen it. Research that recommended leverage indiscriminately would be optimising for the wrong horizon.

Our conclusion is therefore conditional rather than promotional. Leverage is a tool whose value depends entirely on the user, the buffer and the purpose. The honest position is neither borrow because it is cheap nor avoid because it is risky, but arrange the capacity in calm markets, hold it as optionality, and draw it only when the timing or carry case is clear and the buffer is generous.

What this means for clients

Arrange the facility before you need it, when markets are calm and your collateral is fully valued. A committed Lombard line costs little or nothing to hold undrawn, yet it gives you the option to act on a falling-rate opportunity, or to meet a liquidity need, without selling assets in haste. The worst time to negotiate credit is the moment you are forced to use it.

Size to survive a drawdown, not to maximise the draw. As a working rule, set the initial advance so that a 30 percent fall in your portfolio still leaves headroom against the lending value. For most balanced portfolios that implies drawing well below the maximum the bank will offer, often nearer 40 percent of market value than the 60 to 70 percent available. The unused capacity is the margin of safety, not waste.

Use leverage for timing and tax efficiency before reaching for carry. Bridging a capital call, deferring a taxable disposal, or smoothing a lumpy liquidity need are the cases where the value of a Lombard line is clearest and the risk most contained. Treat leveraged carry trades as a separate, deliberate decision that must clear a higher bar, and only after stressing the spread for adverse moves in both rates and credit.

Build a mechanical repayment discipline at the outset. Decide in advance from which cash flow, dividend, coupon, bonus or scheduled sale, the loan will be repaid, and over what horizon. A facility with a defined exit behaves as a bridge; one without becomes a permanent short position that quietly erodes returns. Speak with your relationship manager about structuring the line so that repayment is the default rather than an afterthought.