Sector indices of S&P 500 Stock Index reflect only part of a company's financial situation
Peer-Reviewed Publication
Updates every hour. Last Updated: 24-Oct-2026 05:16 ET (24-Oct-2026 09:16 GMT/UTC)
An analysis of 500 S&P 500 companies revealed that traditional sector labels only partially explain firms’ financial structures. Machine-learning models predicted sectors from accounting ratios, achieving a maximum validation accuracy of 49.3%. However, an unsupervised analysis identified nine financially interpretable groups that crossed sector boundaries. This suggests that, when comparing profitability, leverage, liquidity, and cash-generation patterns, accounting-based peer groups can complement sectors.
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New research that focuses on how to improve behaviour at junior sport calls for a move beyond trying to fix individual parents and coaches behaviour, to instead address the sporting culture in which behaviour is learned, reinforced and normalised.
A new report reveals that tens of thousands of new mothers in the UK may be suffering undiagnosed PTSD following childbirth.
The analysis suggests that emotional and psychological trauma following childbirth may go unrecognised or misdiagnosed during postnatal GP consultations.
The warning comes after two damning reports into maternity and neonatal services in England from Baroness Amos and Donna Ockenden.
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When referring to diet, the term “plant-based” has mixed interpretations among U.S. adults, and its meaning varies significantly among demographic groups, according to new research published in the American Journal of Lifestyle Medicine.
Key findings of the study include:
56% said “plant-based” means vegan—avoiding all animal products.
35% said it means eating abundant plant foods while still eating some meat, dairy and eggs.
7% said they didn't know.
2% gave another answer.
Interpretation also varied significantly by demographic group: 63% of adults ages 65-94 equated plant-based with vegan, compared with 51% of 18-to-34-year-olds.