Price-to-book ratio (P/B ratio, also called price-to-NAV in REIT analysis) compares a REIT’s market price per unit to its net asset value (NAV) per unit. A P/B below 1.0x means the REIT trades at a discount to book value — you are effectively buying its properties for less than their independently appraised worth. This article is for informational purposes only and does not constitute financial advice.
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P/B Ratio Formula
P/B Ratio = Unit Price ÷ NAV per Unit. NAV (Net Asset Value) per unit is calculated as total assets minus total liabilities, divided by total units in issue. For REITs, total assets are primarily the independently-appraised value of investment properties. Unlike industrial companies where book value is driven by equipment and inventory, REIT book value reflects real property valuations — making the P/B ratio far more meaningful for REITs than for most other asset classes.
Example: If CapitaLand Ascendas REIT (CLAR) has a NAV of S$2.80/unit and its market price is S$2.52, the P/B ratio = 2.52 ÷ 2.80 = 0.90x — a 10% discount to book value.
Understanding NAV in S-REITs
Singapore REITs are required by MAS to obtain independent property valuations at least annually from approved valuers (CBRE, JLL, Savills, Knight Frank, Colliers). These valuations form the basis of NAV. The key driver of NAV changes is the capitalisation rate applied by the valuer — when cap rates expand (rise), property values and NAV fall; when cap rates compress (fall), NAV rises.
This is why understanding cap rate is essential to understanding NAV movements. During 2022–2023, rising global interest rates caused valuers to apply higher cap rates, compressing NAV across the S-REIT sector and driving P/B ratios to multi-year lows. As at Q1 2026, the FTSE ST REIT Index trades at approximately 0.90–0.95x P/NAV — historically an attractive entry level.
Trading at Discount vs Premium to Book
A P/B below 1.0x (discount to book) means the market is pricing in risk that the independent valuations don’t fully capture — concerns about cap rate expansion, tenant risk, debt refinancing at higher rates, or structural demand changes. A P/B above 1.0x (premium to book) reflects market confidence that properties will generate returns above what the valuation implies — typically seen in REITs with strong DPU growth prospects, very long WALEs, or trophy assets.
Historically, the Singapore REIT sector has traded in a 0.85–1.20x P/NAV range. During COVID lows (March 2020), some REITs traded at 0.5–0.6x. During the 2018–2021 low-rate bull run, premium REITs like Parkway Life REIT traded above 1.5x NAV. The best S-REITs in Singapore typically command premium P/B multiples.
S-REIT P/B by Sector (Q1 2026)
As at Q1 2026, approximate P/NAV ranges by sub-sector:
- Healthcare: 1.3–1.7x — Parkway Life REIT’s defensive long-lease portfolio commands a persistent premium
- Industrial/logistics: 0.85–1.1x — CLAR, AIMS APAC, ESR-LOGOS; most trading at modest discounts
- Retail: 0.75–1.0x — FCT, CICT, Starhill; suburban community malls holding up better than CBD retail
- Office: 0.60–0.85x — deepest discounts as hybrid work continues to weigh on office demand
- Hospitality: 0.75–0.95x — Far East Hospitality, CDL Hospitality Trusts; recovering post-COVID
- Data centre: 1.1–1.6x — Keppel DC REIT; premium for tech-driven growth
How to Use P/B in REIT Analysis
P/B is most useful as a relative value screen — compare a REIT’s current P/B to its own 5-year historical average, and to peers in the same sub-sector. A REIT trading at a larger-than-historical discount may signal a buying opportunity, or it may reflect structural risks. Always pair P/B analysis with:
- Gearing ratio: High gearing (>40%) can justify a P/B discount due to debt refinancing risk. Check our gearing ratio calculator.
- ICR: A thin interest coverage ratio (below 2.5x) is a warning sign, especially if rates rise.
- WALE: Long WALEs support stable income and justify premium P/B; short WALEs increase rollover risk.
- DPU growth: REITs with growing DPU historically re-rate towards book or above over time. Check our REIT dividend yield calculator.
P/B is also relevant for SRS and CPF OA investors selecting REIT ETFs — see our Singapore REIT ETF guide for how to evaluate S-REIT indices by valuation.
Limitations of P/B Ratio
P/B assumes independent property valuations accurately reflect market value. But valuations are backward-looking and typically based on recent comparable transactions — in illiquid market conditions, they can lag reality. Also, P/B doesn’t capture the quality difference between two REITs with the same NAV — a REIT with long-WALE Grade A assets at 0.9x P/B is very different from a REIT with short-lease suburban industrial assets at the same multiple.
Finally, P/B can be distorted by goodwill, intangibles, or non-property assets on the balance sheet. For pure-play Singapore REITs this is rarely an issue, but for diversified trusts with asset management businesses or stakes in property companies, adjust accordingly.
FAQ: Price-to-Book Ratio Singapore REITs
What does a P/B ratio below 1 mean for a REIT?
A P/B below 1.0x means the REIT trades at a discount to its independently-appraised net asset value. You are buying properties for less than their book value — potentially attractive, but often reflecting genuine concerns about cap rate expansion, debt risk, or demand softness.
What is a good P/B ratio for S-REITs?
The sector average has historically ranged 0.85–1.20x. Defensively positioned REITs (healthcare, long-WALE industrial) often trade at premiums (1.1–1.7x); cyclical sectors (office, hospitality) at discounts (0.6–0.95x). There is no single “good” P/B — always compare within the same sub-sector.
How is REIT NAV calculated in Singapore?
NAV = Total Investment Properties (independently valued) + Other Assets − Total Liabilities, divided by total units in issue. MAS requires independent valuations at least annually from approved valuers.
Why do some Singapore REITs trade above NAV?
Premium valuations (P/B above 1.0x) reflect market confidence in DPU growth, trophy asset quality, very long WALEs, or defensive characteristics. Parkway Life REIT and Keppel DC REIT regularly trade above book due to structural demand tailwinds (healthcare and data centres respectively).
Should I buy a REIT just because it trades below book value?
Not necessarily. A deep P/B discount can be a value trap if the underlying properties are losing tenants, cap rates are expanding, or debt is due for expensive refinancing. Always analyse P/B alongside gearing, ICR, WALE, and occupancy before deciding.