The paper
How Purefolio decides.
Is it halal? Is it worth looking at now? The first is a compliance screen with published thresholds. The second is a ranking with published rules. Both are dated, both are re-run on a schedule, and both are graded afterwards. This page is the whole method, kept as one paper so it can be read in one sitting; nothing is held back. Short answers to the common questions are in the Q&A.
1. The compliance screen
Business first, then the balance sheet. A company fails on either.
Business activity. Companies whose core business is impermissible are out: conventional banking and insurance, alcohol, tobacco, gambling, pork, adult entertainment, conventional weapons manufacturing as commonly applied. A company with a permissible core business can still carry a small impermissible revenue line, which the ratio test below limits.
Financial ratios, AAOIFI basis. Three tests against thresholds that the major Shariah standards set at 30% or 33%:
| Test | What is measured | Threshold, as commonly applied |
|---|---|---|
| Debt | Interest-bearing debt against market capitalisation (or total assets, by standard) | below 30% to 33% |
| Interest-bearing assets | Cash and interest-bearing securities against the same denominator | below 30% to 33% |
| Impermissible income | Interest and other non-compliant revenue against total revenue | below 5% |
We screen every US-listed common stock in our universe, currently 1,596 names of which 1,122 pass (last full screen October 1, 2026), on the first of each month, and re-query any name that reports in between. The status on a ticker page carries the date it was last checked. A status is an opinion based on the latest filing; it changes when the company does.
What we do not do: issue rulings. The thresholds are the standards'; the data are the company's filings. Where a reasonable screen could go either way, the ticker page says "review".
2. Why screens disagree
The question behind most of the forum threads. The answer is mechanical, not theological.
| Standard | Debt test | Interest-bearing assets | Impermissible income |
|---|---|---|---|
| AAOIFI Shari'ah Standard 21 | below 30% of market capitalisation | below 30% of market capitalisation | below 5% of revenue, as commonly applied |
| S&P Shariah indices | below 33% of 36-month average market cap | below 33% of 36-month average market cap | at most 5% of revenue |
| Dow Jones Islamic Market | below 33% of 24-month average market cap | below 33% of 24-month average market cap | limited, with purification |
| MSCI Islamic | below 33.33% of total assets | below 33.33% of total assets | at most 5% of revenue |
Five things make two screens give different answers on the same company in the same week:
- The threshold. 30% against 33%. A company at 31% debt passes one and fails the other.
- The denominator. Market capitalisation moves every day; total assets move every quarter. A stock that halves can fail a market-cap screen with an unchanged balance sheet.
- The averaging window. A 36-month average market cap smooths that; a spot value does not.
- Which filing. One screen has read the latest 10-Q; the other is still on the 10-K.
- Revenue classification. How much of a conglomerate's revenue counts as impermissible is a judgement, and judgements differ.
Our practice: one standard, applied the same way to every name, dated, and re-verified monthly. When a status looks wrong to you, check the filing date first. Then check against other screening engines on the market; we encourage it.
3. The industry map
Before we look at a stock, we look at which industries are rising against the index. The map decides where we look first.
Every week we rank the industries in the compliant universe on relative strength against the S&P 500 over four weeks and thirteen weeks (weighted 60/40). Each industry needs at least five liquid members to be scored. The ranking produces four quadrants: leading (strong on both horizons), improving (turning up), weakening and lagging.
The top of the map is where the screen fishes. Industries already up 10% or more against the index in four weeks, and accelerating, are held to a higher bar, because a stock there is late. The map allocates attention; it never vetoes a name on its own.
4. The four gates
A stock has to clear all four, every week, to be on the list at all.
Safety
A narrow screen for fragile businesses: four quarters of negative free cash flow, or debt above twice equity while losing money. Quality itself is shown as a flag beside every name (operating and free-cash-flow margins, cash conversion, return on assets, leverage, ranked within the sector) and is not a gate since October 15, 2026.
Momentum
Twelve-month price strength excluding the most recent month, blended with shorter horizons so a one-month mover is not missed. Top 20%.
Value
Valuation against the stock's own sector, not the market. The gate is waived when the industry has a seat on the map, because leaders are rarely cheap.
Liquidity
At least five million dollars traded a day, so an ordinary order does not move the price.
Two conditions follow the gates. The price must be above a rising 50-day average, measured over five sessions. And the industry must hold a seat on the map, or, if the industry is too small to score, the stock must beat the index on its own over one and three months.
5. The tiers
What passed is then sorted by how ready it is. The tier is the verdict; the reason travels with it.
Tier 1, ready now
Seat on the map, an independent quantitative forecast that confirms or supports the name, price no more than 10% above the 50-day average, a reward-to-risk of at least 1.5 to the forecast target, and no earnings within ten sessions.
Tier 2, close
Everything above except one check, usually that the price is stretched or the outside forecast has not backed it yet. The Sunday email names the level at which it becomes Tier 1.
Tier 3, watch
Cleared the gates but the forecast is against it, or it is missing more than one Tier 1 condition.
The forecast is a flag, not a gate. It describes where an independent quantitative model stands; "confirmed" means it agreed on two successive nights. Earnings inside ten sessions drop a name one tier and are marked, because that is a decision a reader should make with the calendar in front of them.
The site carries no price level, stop or position size. The level at which a name becomes Tier 1 goes in the Sunday email, and it is shown next to each grade on the scorecard once the ten trading days have passed, so anyone can check the arithmetic. Nothing tells anyone what to buy.
6. The fund checks
Every screened fund gets the same three chart checks; the certified funds are listed first.
Each screened fund is ranked on one-year return, trend (above the 50- and 200-day averages, stacked) and size. A fund below its 200-day average cannot pass, whatever the shorter checks say. The regime, read from volatility and the index trend, sets how cautious the week's read is. Certified means the issuer publishes a Shariah certificate for the fund from a named Shariah board or firm; the rest are screened only.
The verdict on each fund comes from five checks on the chart: not pressed against the upper Bollinger band; close to the middle band; the 10- and 20-day averages rising; RSI in the 40 to 65 zone; MACD turning or positive. Four or five of five clears the checklist, three is close, fewer is not yet. None of these is an instruction; they describe the chart. The checks are designed to avoid buying a fund on the day everyone else does.
7. How we grade ourselves
Published rules are cheap. A published record is not.
A name counts as a hit when it closes at least one unit of risk above the level recorded for it on the day the list is made, within ten sessions, where one unit of risk is twice the fourteen-day average true range. The level is kept on file and shown next to the grade once the ten sessions end, so anyone can check the arithmetic. The target is 70% hits over the first thirty graded names and 75% over sixty. Everything is measured against SPUS, the halal S&P 500, not the S&P 500.
Public record
0 graded so far; the record opens in public at 30
First public list November 1, 2026. Grades land ten sessions after each published list, measured against SPUS. The record opens on this site at 30; misses are published with the hits.
8. The rating and the grades
What the tiers look like on the public pages, and what we do and do not publish.
The rating is the tier in plain words. Buy now: every gate and both confirmations clear at a price within 10% of the 50-day average. Buy on a dip: everything clears except the price, which is stretched more than 10% above it. Wait: the gates clear and the outside forecast is not yet in agreement. Watch: two steps short, or the forecast is against it. Only Buy now and Buy on a dip are published by name; the rest are counted.
The four grades place a company inside the halal universe by fifths: A is the top 20%, E the bottom 20%. Q is quality (margins, returns on capital, balance sheet). M is momentum (price strength over the last year, recent weeks weighted). V is value against the company's own sector. T is trend: a rising 50-day average, an industry the market is rewarding, and a price that is not stretched.
We publish the grades, the rating and the reason for every published name. The weights, the thresholds, the blend windows and the sources behind them are not published. That is the part of the work that is ours.
Glossary
The few terms we kept because the plain phrase was longer.
- Regime
- The market's weather, read from volatility and the index trend: normal, cautious or defensive. It sets how cautious the week's read is.
- Where the screen fishes
- The industries rising fastest against the index this week. Stocks there get a seat on the list.
- Seat
- A place on the list earned by the stock's industry, or by the stock beating the index on its own over one and three months.
- Tier 1, 2, 3
- Passes every check; close, one check short; watch.
- Relative strength
- How an industry or fund did against the S&P 500 over a window, in percentage points.
- Clears the checklist
- An ETF passing four or five of the five chart checks. A description of the chart, not advice.
- Outside forecast
- An independent quantitative price forecast we read as a flag: agrees, agrees twice, neutral, against.
Change log
Rules change in the open, with the date and the reason.
- October 17, 2026 Third outside audit, accepted. One Sunday list: the public page, the share card and the scorecard read one snapshot, frozen until the next Sunday, labelled with the Friday close; weekday runs only add "what changed since". A fund below its 200-day average or ranked Skip cannot pass (ITB was shown passing). The funds that pass are named where the count is. Near-miss reasons name the real missing check. Stance badges and buy-list words removed from every public surface; "list" and "idea" replace "call". No other screening service is named anywhere. The author's own holdings leave the site. Retirement page opens with the 401(k) question and three sourced places the money can sit. Lookup: answer above the small print, plain words for misses, "re-check due" on any check older than 30 days, "under review" and "not screened yet" counted apart. This section renamed from "The ETF playbook"; "Tier 2, needs a level" became "Tier 2, close"; levels go in the Sunday email and next to each grade.
- October 17, 2026 New landing page: the trust line, then two doors (retirement money, stocks and trading), each its own page; the first landing kept at /classic. New /record scorecard page, published before any grade.
- October 15, 2026 Quality moved from gate to flag after a review found the old score was a third growth, ranked across sectors, and had no predictive value in the Aug-Oct window; a narrow safety screen (negative free cash flow for four quarters, or heavy debt while loss-making) is the fourth gate instead; the quality score is rebuilt cash-based and ranked within sector.
- October 15, 2026 The landing page became five screens (the message, the halal check, this week's answer, the $10,000 comparison, the author); the story moved to /story. Public data file stripped of the allocation split and bucket picks; fund verdicts published in the site's words. Check-date wording made exact: monthly cycle plus the date each record was last updated.
- October 14, 2026 Second outside audit: buy language removed from This Week, one email promise on every page, chart words moved out of the drawings so they read on a phone, savings line dropped from the home chart, per-name check dates in the lookup, share tags per page.
- October 14, 2026 Home page rebuilt as a two-screen story (money is a trust; why it must be halal, with the three rules and the 401(k) door); Q&A moved to its own page; ETF page merged into the lookup; This Week reads as one line, one strip, one chart, funds then stocks; stock reasons rewritten in plain words; fund certification verified from issuer documents and marked.
- October 10, 2026 Stock cards carry a four-word stance (bullish / somewhat bullish / neutral / bearish) in place of tier numbers and forecast flags; the mapping is in the glossary. Money-flow map shown as a sorted bar chart around zero. Landing page rebuilt as a four-screen story for readers new to halal investing.
- October 10, 2026 Wording: ETF verdicts renamed to "clears the checklist / close / not yet" so no label reads as an instruction. Lookup totals now include names not yet checked. Ticker pages carry the per-name check date only.
- October 9, 2026 Site restructured around the questions readers ask: the weekly read, the ETF page, the ticker lookup and this page. Full stock tiers and the full ETF list published; levels stay in the email.
- October 8, 2026 Entry standard v2.2: forecast demoted from gate to flag; three tiers defined; 10% extension line; value gate waived where the industry has a seat.
- October 1, 2026 Monthly compliance re-screen of the full universe.
- September 17, 2026 Four gates computed on the whole compliant universe, not a shortlist, so nothing is missed by a front door.
- September 15, 2026 Industry map adopted as the first step of the funnel.
Questions about a rule: about and contact.