The NAV of a Swiss Real Estate Fund: Where It Comes From, Why It Moves So Slowly

Key Takeaways

The NAV is not a price: the net asset value is an estimate – the market value of the buildings as appraised by independent experts, minus debts and the taxes that would fall due on liquidation, divided by the number of units. Nobody has ever bought a building "at NAV."
It rests on the DCF method: each building is worth the discounted sum of its future net rental income. The decisive parameter is the discount rate: with identical income, moving it from 4.0% to 3.5% raises the value by about 14%; raising it to 4.5% cuts the value by about 11%.
It is net of deferred taxes: net assets deduct the estimated taxes that would be owed if the buildings were sold – a substantial and often ignored deduction in comparisons.
It moves slowly, by construction: valuations follow the closing calendar, and appraisals anchor on comparable transactions that arrive with a delay – "appraisal smoothing" has been documented by research since the 1990s. The NAV is a moving average of reality, not its snapshot.
The price, meanwhile, moves fast: on the exchange, the unit trades continuously. The gap between a fast price and a slow NAV is exactly what the agio measures – and what explains its spectacular swings.
The key reflex: when NAV changes, look for the source – income, discount rate, or portfolio changes – and remember that every ratio built on NAV (agio, leverage, investment return) inherits its slowness.

Introduction

The entire analysis of a listed real estate fund rests on one number: the net asset value. The premium is measured against it, leverage is expressed relative to it, the investment return is computed on it, and unit issuances are priced off it. Yet few investors could answer two simple questions: where does this number come from, and how fast does it tell the truth?

The two questions are linked. The NAV is not a price observed on a market; it is an estimate produced by experts, under a precise method, at a given rhythm. That manufacturing process has properties – including a structural slowness that real estate research has documented for thirty years – and those properties pass through to every ratio built on it.

This article takes the NAV factory apart: what it is, who produces it, how the DCF method works, what deferred taxes subtract from it, why it smooths reality – and what that slowness means in practice when reading a fund. It complements our article on agio and disagio, which compares NAV with the market price; here, the NAV itself is opened up.

What the NAV Is – and Is Not

The definition fits in one line: NAV per unit is the fund's net assets divided by the number of units outstanding. Net assets start from the buildings' market value as appraised by the experts, add the other assets (cash, receivables), and subtract debts (mortgages first) and deferred taxes – the taxes that would fall due if the buildings were sold.

Three uses follow. The NAV serves as the reference for issuances and redemptions: capital increases set their issue price relative to it, as detailed in our article on capital increases. It is the denominator of the agio: the price's premium or discount is measured against it. And it is the basis of the investment return, the standardized measure of the fund's economic performance.

Which makes it worth saying what the NAV is not. It is not the stock market price – the gap between the two is structural and sometimes massive. It is not the tax value of the units, computed under different rules for wealth tax, as explained in our article on taxation. And it is not the proceeds of an actual sale: it is an expert's opinion on what a careful sale would fetch, not a transaction.

Who Appraises: The Independent Experts

Collective investment law requires real estate funds to have their buildings appraised by independent permanent experts, accredited by the supervisory authority. Appraisals take place at every fiscal year end, and whenever buildings are bought or sold. Annual reports summarize the experts' conclusions and publish their key parameters – including the average discount rate, which our annual-report reading guide treats as the single most important stop.

This architecture – independent experts, a regulated method, published parameters – is a strength of the Swiss system: it makes NAVs comparable across funds and holds managers to account. It does not change the nature of the number: an estimate remains an estimate, with its conventions and its inertia.

The Method: Discounting Future Rents

The market standard is the DCF (discounted cash flow) method: a building's value is the sum of its future net rental income – expected rents, minus vacancy, non-recoverable costs, and capital expenditure – discounted at a rate reflecting the property's risk: location, building quality, tenant profile.

The calculation's sensitivity to the discount rate is the single most important intuition to take away. An order of magnitude suffices: for a building generating CHF 1 million of net income per year, assumed constant:


Discount rate	Estimated value	Change
3.5%	≈ CHF 28.6 million	+14.3%
4.0%	≈ CHF 25.0 million	reference
4.5%	≈ CHF 22.2 million	−11.1%

Half a point of discount rate moves the value by more than ten percent – without a single rent changing. At the scale of a whole portfolio, the annual NAV change therefore always decomposes into three sources: what income did (rents, vacancy, costs), what the rate did, and what the perimeter did (acquisitions, disposals, projects). Annual reports make that decomposition possible; it is what separates operational value creation from a mere parameter move.

Deferred Taxes: The Deduction Everyone Forgets

Between the buildings' value and net assets sits a discreet deduction: deferred taxes. If the fund sold its buildings, taxes would fall due – real estate gains taxes in particular, under the cantonal regimes. The NAV anticipates that charge: it is computed net of the taxes estimated on liquidation.

The practical consequence is twofold. First, the NAV is more conservative than a simple sum of market values – the gap can represent several percent of net assets. Second, the amount of deferred taxes depends on assumptions (holding periods, cantonal rates, historical acquisition values) that differ from fund to fund: two identical portfolios can show different NAVs purely because of their tax history. Annual reports detail this position – one more line to know before comparing agios to the tenth of a percent.

Why the NAV Moves Slowly

The NAV's slowness is not an execution flaw; it is built into its manufacturing, for two reasons.

The first is rhythm: full appraisals happen at closings, once or twice a year. Between closings, the published NAV lives mostly on acquisitions and current results, not on the property market's pulse.

The second runs deeper: appraisal anchoring. An expert valuing a building leans on observed comparable transactions – which reflect the market of several months ago – and prudently adjusts the previous estimate. Individually rational, this behavior collectively produces what research calls appraisal smoothing: David Geltner showed as early as 1991 that appraisal-based value series understate the true volatility of real estate markets and react to their turning points with a lag. Later work on "price discovery" confirmed the order in which information arrives: listed real estate vehicles move first, appraisals follow.

The NAV therefore behaves like a moving average of market value: faithful on the trend, late at the turns, dampened in amplitude. In calm phases the gap is invisible; in turning points it becomes the main character.

What That Slowness Means for Investors

Four practical consequences follow from this mechanic.

The agio is a gap between two speeds. The price reacts continuously to rates, flows, and sentiment; the NAV answers with months of delay. Part of the spectacular swings in premiums tells no story about the fund at all – merely the meeting of a fast numerator and a slow denominator, the reading grid developed in our article on the agio.
Ratios built on NAV inherit its slowness. The borrowing ratio relates real debts to smoothed values: in a correction, it can deteriorate after the fact, as appraisals catch up with the market. The investment return, computed on NAV, looks steadier than the investor's stock market experience actually is.
The risk you live through is the price's, not the NAV's. In a portfolio, the listed unit fluctuates with the market; the NAV's stability cushions nothing for whoever has to sell. The volatility that matters for sizing a position is the market's – the NAV describes long-term asset value instead.
NAV changes are read by decomposing them. Income, discount rate, perimeter, deferred taxes: an increase driven purely by a lower discount rate and one driven by rents have neither the same quality nor the same reversibility. The annual report provides everything needed to make that sort in minutes.

Conclusion

The NAV of a Swiss real estate fund is a remarkably well-manufactured number – accredited independent experts, a regulated DCF method, published parameters, the prudence of deferred taxes – and a structurally slow one. Both truths belong together: the rigor of the process makes its long-term reliability; its rhythm and anchoring make its lag at market turns.

The investor who understands this manufacturing stops asking the NAV for what it cannot give – an instantaneous price – and asks it for what it gives well: a comparable, decomposable, accountable measure of asset value. The rest of the analysis plays out between the NAV and the market price – on the agio's turf, where this series began.