Energy sector stocks: FundamentalRadar page explained
TL;DR
- The energy-sector page maps Brazilian electricity companies to official B3 regulator labels ("Energia Elétrica"), showing listed-paper counts, company counts, share of base, and medians for P/E, P/B, ROE, and dividend yield.
- Medians are calculated using the most liquid share class per company, with zero P/E or P/B values treated as missing data, and dividend yield medians using only payers.
- The leaders table ranks companies by ROE, displaying ticker, price, P/E, dividend yield, and market cap; all figures are comparative snapshots, not investment recommendations.
What you see on the energy sector page
The energy-sector page on FundamentalRadar aggregates Brazilian electricity companies under the official B3 regulator classification. The label applied is Energia Elétrica, which covers generators, transmission, distribution, and energy services companies listed on B3. The page then reports:
- Listed papers in sector
- Companies (distinct corporations)
- Share of base (percentage of total B3 stocks)
- Median P/E, median P/B, median ROE, median dividend yield
- A breakdown table for any grouped official labels
- A leadership ranking by ROE with ticker, price, P/E, dividend yield, and market cap
- A catalog of all classified tickers
The footer explicitly states: "FundamentalRadar · informative sector analysis, not investment advice."
Covered labels and sector classification
B3 classifies companies by the products and services that generate the majority of their revenues. For electricity companies, the primary label is Energia Elétrica, under the broader Utilidade Pública (Public Utilities) sector. This classification encompasses:
- Generation companies (thermals, hydro, wind, solar)
- Transmission operators
- Distribution utilities
- Energy service and trading companies
The page maps each ticker to this single regulator label. When multiple official labels would be grouped under an umbrella, the page publishes medians per individual label rather than a pooled median. The energy page uses the singular "Energia Elétrica" label, so the published metrics reflect the entire sector as classified by B3 [^1][^2].
How medians and rankings are calculated
Median definition
A median is the middle value when observations are sorted in order. For ten P/E values of 4, 5, 6, 7, 8, 9, 10, 12, 15 and 200×, the median is 8.5×, not the 26.4× average. This resistance to outliers makes medians reliable for comparison, especially when a few extreme values would distort the average [^1].
Excluding zeros from P/E and P/B
The FundamentalRadar backend treats a P/E or P/B of exactly 0.00 as missing data, not as a legitimate ratio. A zero denominator typically indicates unavailable earnings or book value, making the ratio mathematically undefined. These values are excluded from median calculations [^2].
Dividend yield medians use "payers only"
A dividend yield of exactly 0.00% is a factual measurement: the company distributed no dividends. However, the sector median dividend yield counts payers only. Including companies with zero dividends would artificially depress the median, contradicting the implicit meaning of "yield" in the label [^3].
Share class selection
When a company issues multiple share classes (e.g., BDRs or Brazilian ON and PN shares), the platform uses only the most liquid class. This prevents double-counting and ensures one data point per company [^4].
ROE leaders ranking
The leaders table ranks companies by Return on Equity (ROE) from highest to lowest. Each row includes ticker, current price, P/E, dividend yield, and market capitalisation [^5].
Metric definitions
Use consistent periods and share classes when comparing companies.
- P/E: share price divided by earnings per share (EPS), or market cap divided by net income. It represents how many times annual earnings investors pay for [^1]. See also P/E ratio explained.
- P/B: share price divided by book value per share. It compares market price with net assets per share [^2]. See also P/B valuation method.
- ROE: net income divided by average shareholders' equity. It measures how efficiently a company uses equity to generate profit [^3]. See also ROE profitability guide.
- Dividend yield: dividends plus interest on equity divided by share price. The result is expressed as a percentage [^2]. See also dividend yield analysis.
- Market cap: share price times shares outstanding. For companies with multiple classes, it aggregates across all classes [^1]. See also market cap reference.
The median is the middle value after ordering observations, less affected by extreme values.
The Brazilian electricity sector context
Electricity companies in Brazil operate under a unique regulatory framework. The Agência Nacional de Energia Elétrica (ANEEL) regulates generation, transmission, distribution, and commercialization. Companies may operate under two main contracting environments:
- ACR (Ambiente de Contratação Regulada): The regulated market where distributors purchase electricity through regulated mechanisms and auctions. ANEEL sets tariffs and monitors concessions.
- ACL (Ambiente de Contratação Livre): The free market where consumers negotiate directly with generators or traders.
This duality affects profitability profiles. Distribution companies typically have stable, regulated revenues but face rate regulation constraints. Generation companies are more exposed to market prices and fuel costs. Investors should understand which contracting regime dominates each company's revenue stream [^6].
The primary stock index for the sector is the Índice de Energia Elétrica (IEE), an equal-weight index published by B3. The index includes the most liquid and representative electricity-sector stocks, rebalancing quarterly based on liquidity and presence metrics [^2].
Data freshness, coverage, and limitations
Real-time vs. stale data
Prices and price-derived metrics (P/E, P/B, market cap) update daily during B3 trading. Fundamental ratios from financial statements lag behind: companies publish quarterly reports with delays of weeks to months. The sector median represents the latest available snapshots, not synchronized dates.
B3 sector classification criteria
B3 classifies companies by the products and services that contribute most to revenue, including proportional contributions from affiliates. For holding companies, the dominant business line determines classification when it represents at least two-thirds of consolidated revenue[^^7^. Otherwise, the company is classified as a diversified holding. The classification may be revised when product mix changes significantly.
Substantive coverage
The page distinguishes between total classified assets and "substantive coverage" — assets actually in named industries, excluding catch-all buckets like "Outros" or "Multicategoria". A headline coverage of 100% may include generic labels; FundamentalRadar filters these to show only meaningfully classified assets [^8].
How company counts differ from listed-paper counts
One company can issue multiple share classes, each becoming a separate listed paper. The page reports two counts: listed papers in sector and distinct companies. When a firm has both ON and PN shares, both papers appear in the asset count, but the company is counted once in the per-company field.
What the page does not show
The page omits free-float weighting, index membership, and sector weights within broader indices. It does not blend groups when labels differ in profile, and it does not extrapolate future earnings or dividends. All figures are comparative snapshots, not projections [^1].
Common errors and fixes
| Error | Cause | Fix | Source |
|---|---|---|---|
| Treating sector label as complete risk description | Classification uses main revenue source only | Review subsidiaries, geographic exposure, and debt separately | [^7^][^9^] |
| Comparing pooled medians across pages | Grouped pages publish per-label medians | Use the label breakdown, not any group total | [^8^] |
| Interpreting zero P/E or P/B as cheap | Zero is masked missing data | Treat null values as unavailable, not valuation opportunities | [^2^] |
| Assuming median yield guarantees future cash | Zero means no distribution, not unknown | Check payout history and payment sustainability | [^2^][^3^] |
| Using stale snapshot as current data | Request time differs from market-activity time | Verify the requested-at note and use latest screener snapshot | [^8^] |
| Confusing ACR with B3 sector classification | ACR is market regime, not classification | Understand both regulatory framework and sector taxonomy | [^6^] |
Frequently Asked Questions (FAQ)
1. Is this page an investment recommendation?
No. It is an educational comparison of valuation and profitability indicators for Brazilian electricity stocks. It does not recommend any stock or promise returns.
2. Why are some P/E or P/B values missing?
A zero ratio is treated as missing data because the denominator (earnings or book value) is unavailable or not meaningful. Only non-zero reported values are used in medians [^2^].
3. What does "payers only" mean for dividend yield?
The median yield includes only companies that actually paid dividends in the trailing period. A zero yield from a non-payer is excluded; a zero yield from a payer is a measured outcome that contradicts the label [^3^].
4. How should I read the ROE ranking?
The ranking sorts companies by ROE, which measures how efficiently equity generates profit. Higher ROE can indicate efficient capital use, but it does not predict future stock performance or imply a buy signal.
5. Why does coverage matter?
Coverage shows what share of the total B3 universe is actually in named electricity subsectors. High headline coverage may hide unclassified papers in generic catch-all buckets; FundamentalRadar shows substantive coverage [^8^].
6. Can I use these numbers for trading decisions?
You can use them as part of research, but always combine them with financial statements, liquidity analysis, debt metrics, corporate governance, and your investment objectives. The page is informative, not advisory.
7. What's the difference between ACR and the B3 sector label?
ACR (Ambiente de Contratação Regulada) is a market operating regime where energy is contracted through regulated mechanisms. It is not a sector classification. B3 classifies companies by their main revenue source, which may be regulated, free-market, or mixed. The page shows sector classification, not market regime [^6^].
8. How often is the data updated?
The sector endpoint recomputes medians from the latest screener snapshot on each request. Prices update daily during B3 trading. Fundamental ratios update when companies file quarterly reports. The displayed timestamp shows when the data was requested.
Sources
| Source | Contribution |
|---|---|
| B3 Sector Classification Criteria | B3 classification methodology, revenue-based sector assignment, holding company rules |
| B3 Índice de Energia Elétrica (IEE) | IEE index composition, selection criteria, equal-weight methodology |
| ANEEL Regulatory Framework | Electricity sector regulation, ACR vs ACL market regimes, tariff setting |
| Wikipedia: Price–earnings ratio | P/E definition, median calculation logic, industry interpretation |
| Wikipedia: Return on equity | ROE formula, DuPont decomposition, cross-industry ranges |
| Wikipedia: Dividend yield | Dividend yield calculation, relationship to payout policy |