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Part of book or chapter of book . 2026
License: CC BY
Data sources: Datacite
ZENODO
Part of book or chapter of book . 2026
License: CC BY
Data sources: Datacite
ZENODO
Part of book or chapter of book . 2026
License: CC BY
Data sources: Datacite
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Rethinking the Valuation of the S&P 500 and Temporary Loss-Making Companies such as Bloom Energy: How SIRRIPA Complements the P/E Ratio

Authors: Sam, Rainsy;

Rethinking the Valuation of the S&P 500 and Temporary Loss-Making Companies such as Bloom Energy: How SIRRIPA Complements the P/E Ratio

Abstract

This note argues that the P/E ratio alone is insufficient for modern equity valuation and introduces SIRRIPA (Stock Internal Rate of Return Including Price Appreciation) as a complementary, return-based metric. Although the S&P 500 trades at a high P/E (around 29), its SIRRIPA is about 5.55%, above the U.S. 10-year Treasury yield (~4%), suggesting fair valuation in intrinsic return terms rather than clear overpricing. The limitations of the P/E ratio are even clearer for Bloom Energy, whose negative EPS makes the P/E meaningless. Yet its SIRRIPA of 12.09% indicates a strong embedded annualized return, more than double that of the S&P 500. By shifting from multiples to intrinsic annualized returns, SIRRIPA enables consistent valuation of both profitable indices and temporary loss-making companies on a unified return basis.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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