SPRO (Spero Therapeutics) Cyclically Adjusted PS Ratio: (As of Aug. 26, 2026)

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SPRO Spero Therapeutics Inc SPRO
46 GF Score
Price $1.22
GF Value $0.80
Valuation Significantly Overvalued
! 2 Warning Signs
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What is Spero Therapeutics Cyclically Adjusted PS Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Spero Therapeutics  (NAS:SPRO) Cyclically Adjusted PS Ratio Explanation

Compared with the regular PS Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PS Ratio smoothed out the fluctuations of revenue 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 PS Ratio should give similar results to regular PS Ratio.


Spero Therapeutics Cyclically Adjusted PS Ratio Related Terms


Spero Therapeutics Cyclically Adjusted PS Ratio Historical Data

* Premium members only.

The historical data trend for Spero Therapeutics's Cyclically Adjusted PS 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.

Spero Therapeutics Cyclically Adjusted PS Ratio Chart

Spero Therapeutics Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted PS Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.00 0.00 0.00 0.00 0.00

Spero Therapeutics Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
Cyclically Adjusted PS 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 0.00 0.00 0.00 3.43 0.00

SPRO vs ACRV, BSEM, RNTX: Cyclically Adjusted PS Ratio Comparison

For the Biotechnology subindustry, Spero Therapeutics's Cyclically Adjusted PS Ratio, along with its competitors' market caps and Cyclically Adjusted PS 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.


Spero Therapeutics Cyclically Adjusted PS Ratio vs Biotechnology Industry

For the Biotechnology industry and Healthcare sector, Spero Therapeutics's Cyclically Adjusted PS Ratio distribution charts can be found below:

* The bar in red indicates where Spero Therapeutics's Cyclically Adjusted PS Ratio falls into.


SPRO
46GF Score
Spero Therapeutics Inc SPRO
Cyclically Adjusted PS Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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Spero Therapeutics Cyclically Adjusted PS Ratio Calculation

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

Spero Therapeutics's Cyclically Adjusted Revenue per Share for the quarter that ended in Jun. 2026 is calculated as:

For example, Spero Therapeutics's adjusted Revenue per Share data for the three months ended in Jun. 2026 was:

Adj_RevenuePerShare=Revenue per Share/CPI of Jun. 2026 (Change)*Current CPI (Jun. 2026)
=0/333.9520*333.9520
=0.000

Current CPI (Jun. 2026) = 333.9520.

Spero Therapeutics Quarterly Data

Revenue per Share CPI Adj_RevenuePerShare
201609 0.000 241.428 0.000
201612 0.000 241.432 0.000
201703 0.000 243.801 0.000
201706 0.000 244.955 0.000
201709 0.000 246.819 0.000
201712 0.000 246.524 0.000
201803 0.000 249.554 0.000
201806 0.032 251.989 0.042
201809 0.000 252.439 0.000
201812 0.000 251.233 0.000
201903 0.221 254.202 0.290
201906 0.122 256.143 0.159
201909 0.249 256.759 0.324
201912 -0.513 256.974 -0.667
202003 0.087 258.115 0.113
202006 0.084 257.797 0.109
202009 0.182 260.280 0.234
202012 -0.261 260.474 -0.335
202103 0.000 264.877 0.000
202106 0.071 271.696 0.087
202109 0.022 274.310 0.027
202112 0.008 278.802 0.010
202203 0.008 287.504 0.009
202206 0.027 296.311 0.030
202209 0.030 296.808 0.034
202212 0.949 296.797 1.068
202303 0.014 301.836 0.015
202306 0.015 305.109 0.016
202309 0.444 307.789 0.482
202312 1.327 306.746 1.445
202403 0.079 312.332 0.084
202406 0.112 314.175 0.119
202409 0.144 315.301 0.153
202412 0.172 315.605 0.182
202503 0.092 319.799 0.096
202506 0.211 322.561 0.218
202509 0.054 324.800 0.056
202512 0.578 324.054 0.596
202603 0.005 330.213 0.005
202606 0.000 333.952 0.000

Add all the adjusted revenue per share together and divide 10 will get our Cyclically Adjusted Revenue 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 Spero Therapeutics (SPRO) Overvalued in 2026?

Based on GuruFocus' analysis, Spero Therapeutics stock appears to be overvalued. The current stock price of $1.22 is trading 51.9% above its estimated GF Value™ of $0.80. GuruFocus considers Spero Therapeutics to be Significantly Overvalued.

Key valuation signals for SPRO:

  • Cyclically Adjusted PS Ratio:
  • GF Value™: $0.80 vs. price of $1.22 (51.9% above fair value)
  • GF Score™: 46/100 with 2 warning signs

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


Spero Therapeutics Business Description

Other Exchanges 2HA:Germany
Address 675 Massachusetts Avenue, 14th Floor, Cambridge, MA, USA, 02139
Spero Therapeutics Inc is a clinical-stage biopharmaceutical firm. It focuses on identifying, developing, and commercializing novel treatments for MDR (Multi-drug-resistant) bacterial infections and rare diseases. The company's product candidate, tebipenem pivoxil hydrobromide or tebipenem HBr, is designed to be an oral carbapenem-class antibiotic for use in adults to treat MDR Gram-negative infections. It is also developing SPR720, a novel oral antibiotic designed for the treatment of a rare, orphan disease caused by pulmonary non-tuberculous mycobacterial infections, or NTM disease. It is also focused on SPR206, a next-generation polymyxin investigational product candidate being developed as an IV-administered medicine to treat MDR Gram-negative infections in the hospital.
46GF Score

Get the complete analysis for SPRO

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

$1.22
Price
$0.80
GF Value