Singapore Airlines (SGX:C6L) Cyclically Adjusted PB Ratio: (As of Sep. 21, 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

SGX:C6L Singapore Airlines Ltd SGX:C6L
76 GF Score
Price S$6.51
GF Value S$7.53
Valuation Modestly Undervalued
! 5 Warning Signs
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What is Singapore Airlines Cyclically Adjusted PB Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Singapore Airlines  (SGX:C6L) Cyclically Adjusted PB Ratio Explanation

Compared with the regular PB Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PB Ratio smoothed out the fluctuations of book value during business cycles. Therefore it is more accurate in reflecting the valuation of the company.

If a company has consistent business performance, the Cyclically Adjusted PB Ratio should give similar results to regular PB Ratio.


Singapore Airlines Cyclically Adjusted PB Ratio Related Terms


Singapore Airlines Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for Singapore Airlines's Cyclically Adjusted PB Ratio can be seen below:

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

Singapore Airlines Cyclically Adjusted PB Ratio Chart

Singapore Airlines Annual Data
Trend Mar17 Mar18 Mar19 Mar20 Mar21 Mar22 Mar23 Mar24 Mar25 Mar26
Cyclically Adjusted PB Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.63 0.66 0.75 0.83 0.83

Singapore Airlines Semi-Annual Data
Sep16 Mar17 Sep17 Mar18 Sep18 Mar19 Sep19 Mar20 Sep20 Mar21 Sep21 Mar22 Sep22 Mar23 Sep23 Mar24 Sep24 Mar25 Sep25 Mar26
Cyclically Adjusted PB Ratio Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 0.73 0.79 0.80 0.79 0.81

SGX:C6L vs DAL, UAL, LUV: Cyclically Adjusted PB Ratio Comparison

For the Airlines subindustry, Singapore Airlines's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted PB Ratio data, can be viewed below:

* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.


Singapore Airlines Cyclically Adjusted PB Ratio vs Transportation Industry

For the Transportation industry and Industrials sector, Singapore Airlines's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where Singapore Airlines's Cyclically Adjusted PB Ratio falls into.


SGX:C6L
76GF Score
Singapore Airlines Ltd SGX:C6L
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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Singapore Airlines Cyclically Adjusted PB Ratio Calculation

Like the Shiller PE Ratio, the Cyclically Adjusted PB Ratio takes the Book Value per Share from the past 10 years, adjusts it for inflation, and then calculates the average. This average is then used for the P/B calculation. Because it considers this 10-year average, it's often referred to as the CAPB Ratio.

The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio.

Singapore Airlines's Cyclically Adjusted Book per Share for the fiscal year that ended in Mar26 is calculated as:

For example, Singapore Airlines's adjusted Book Value per Share data for the fiscal year that ended in Mar26 was:

Adj_Book=Book Value per Share/CPI of Mar26 (Change)*Current CPI (Mar26)
=5.613/330.2130*330.2130
=5.613

Current CPI (Mar26) = 330.2130.

Singapore Airlines Annual Data

Book Value per Share CPI Adj_Book
201703 8.033 243.801 10.880
201803 7.882 249.554 10.430
201903 8.145 254.202 10.581
202003 5.786 258.115 7.402
202103 5.490 264.877 6.844
202203 7.683 287.504 8.824
202303 6.817 301.836 7.458
202403 5.631 312.332 5.953
202503 5.405 319.799 5.581
202603 5.613 330.213 5.613

Add all the adjusted book value per share together and divide the count will get our Cyclically Adjusted Book per Share.

Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.

Is Singapore Airlines (SGX:C6L) Overvalued in 2026?

Based on GuruFocus' analysis, Singapore Airlines stock appears to be undervalued. The current stock price of S$6.51 is trading 13.5% below its estimated GF Value™ of S$7.53. GuruFocus considers Singapore Airlines to be Modestly Undervalued.

Key valuation signals for SGX:C6L:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: S$7.53 vs. price of S$6.51 (13.5% below fair value)
  • GF Score™: 76/100 with 5 warning signs

No single metric tells the full story. See the SGX:C6L stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Singapore Airlines Business Description

Address 25 Airline Road, Airline House, Sinagapore, SGP, 819829
Singapore Airlines is Singapore's flagship carrier and one of the region's largest airlines in terms of revenue and carrying capacity. With its hub in Changi Airport, the carrier provides regional and cross-continental passenger and cargo services destined to or transiting through Singapore. The company operates under dual brands: full-service carrier SIA and low-cost regional carrier Scoot. It also owns stakes in SATS and SIA Engineering. In 2024, the merger of its associate airline Vistara with Air India resulted in Singapore Airlines owning a 25% stake in Air India.
76GF Score

Get the complete analysis for SGX:C6L

Cyclically Adjusted PB Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

S$6.51
Price
S$7.53
GF Value