This is Quant500: we score S&P 500 companies every market day from public SEC data. Free, no account — today's ranking.
After a 0.25% drop, the model expects a quiet session in the S&P 500 today: a 0.30% move and a 7,621–7,727 range
This is a forecast and tonight you will know whether it held: today's range is checked against today's close and the result is published either way. The model is right 59.89% of the time when it calls whether a day will be more turbulent than usual, against 51.27% for always calling the more frequent outcome (the majority class), measured over 1067 sessions it never saw. Below: who enters and who leaves the ranking, what executives bought with their own money, and who reports next trading day.
02What changed in the ranking
From the session of 27-Aug-2026 to that of 28-Aug-2026, across the 466 scored companies.
The ranking is recomputed every session, and this is what moved from one to the next. Next to each move is the factor that produced it: momentum changes every day, value whenever the price does, and quality and growth only when new accounts come in. Why the price moved is not in this data, so it is not told.
| Company | Top 20 | What moved |
|---|---|---|
| PLTR in | #23 → #19 | Momentum 3.8 → 4.0 |
| LRCX in | #32 → #20 | Momentum 7.3 → 7.8 |
| FTNT out | #18 → #24 | Momentum 7.5 → 7.2 |
| TPR out | #20 → #21 | Value 4.5 → 4.4 |
The biggest moves in the whole index: PWR climbs 59 places, from #210 to #151 (Momentum 5.7 → 6.4, Value 4.0 → 4.1) and SMCI drops 161 places, from #140 to #301 (Momentum 3.7 → 4.0, Value 6.0 → 6.1, Growth 6.9 → 4.8).
Source: rankings_diarios.json.gz · rank by multi-factor (the average of the four), across the 466 companies with all four computed · scores on the 0-10 scale used on company pages, where 5 is the index average. See all 500 scored →
03Who filed, and what it did to them
The 7 companies that filed with the SEC on August 28, 2026, and how their score moved once the new numbers went in.
The section above shows the ranking moving; almost always it is the price moving it. This is the other thing: a quarterly or annual report rewrites value, quality and growth at once, and those are audited accounts, not a quote. Here is the before and after, on the 0-10 scale used on company pages, where 5 is the index average.
| Company | Rank | Multi-factor | What moved |
|---|---|---|---|
| WSM | #234 → #179 (+55) | 4.9 → 5.1 | Momentum 5.1 → 5.2, Value 4.2 → 4.3, Growth 4.3 → 4.7 |
| MRVL | #108 → #56 (+52) | 5.3 → 5.6 | Momentum 6.3 → 6.5, Growth 6.0 → 6.7 |
| ADSK | #205 → #155 (+50) | 5.0 → 5.1 | Value 3.9 → 4.0, Quality 6.2 → 6.3, Growth 6.0 → 6.3 |
| TGT | #141 → #100 (+41) | 5.2 → 5.3 | Momentum 6.6 → 6.3, Value 5.7 → 6.0, Quality 4.3 → 4.4, Growth 4.1 → 4.7 |
| JKHY | #264 → #288 (-24) | 4.8 → 4.8 | Momentum 4.3 → 4.2, Quality 5.8 → 5.7, Growth 4.8 → 4.7 |
| WMT | #267 → #277 (-10) | 4.8 → 4.8 | Momentum 5.3 → 5.1 |
| TJX | #130 → #127 (+3) | 5.2 → 5.2 | Momentum 5.5 → 5.4, Value 4.3 → 4.4, Quality 5.9 → 6.0, Growth 5.0 → 5.2 |
Filing date on EDGAR, not the quarter end. Scores come from the rankings calendar: the same ones each company page publishes. No opinion on the results, only the measured effect.
04What the executives did
SEC Form 4, session of August 28, 2026. 1 sale, 0.2 million dollars.
The rare thing on a Form 4 is a purchase. The largest on August 27, 2026: Cascade Investment, L.L.C., Gates William H Iii, 10% Owner at Republic Services, bought 284,600 shares at $219.52 (62.48 million dollars), code P, meaning on the open market and with their own money. see the Form 4 →
2 purchases were filed that day across 2 companies. Over the 90-day window there are 82 purchases worth 730 million dollars across 34 companies, against 876 sales: which is why a purchase gets told and a sale gets tabulated.
The biggest sale of the day tells you nothing. Bruls Annette, of Edwards Lifesciences, sold 0.2 million dollars of stock and still holds 17,984 shares: that is 12.82% of the position.
The only sale filed that day was discretionary. And here is the finding: the largest sale as a share of holding was discretionary.
| Company | Role | % of holding | Value | Left |
|---|---|---|---|---|
| Edwards Lifesciences Bruls Annette · largest of the day by dollar value | CVP, EMEACLA | 12.8% | 0.24 M$ | 17,984 sh. |
Source: Form 4 filings with the SEC · alertas_insiders.json, session of 28-Aug-2026. Every name links to its filing on EDGAR: the claim and the proof on the same line.
The 90-day context: 876 sales worth 3,993 million dollars (2 with no declared price, outside that total), of which 406 were discretionary, and of those 131 exceeded 25% of the seller's position. That is where to look.
Before drawing conclusions
Executives sell for divorces, mortgages, taxes and school fees, not only because they see clouds. The SEC does not require a reason, and we do not know it.
What we do know is that these people chose the timing. It is a map of where to look. It is not a sell signal.
05The three portfolios that can actually be audited
Rebuilt month by month using only what was known on the day.
| Portfolio | Cumulative | CAGR | Sharpe | Max DD | This year | Last month |
|---|---|---|---|---|---|---|
| Value 100Earnings, book and sales yield | +602.8% | 13.45% | 0.63 | -50.78% | +22.35% | +4.27% |
| Momentum 10012m return ex-latest month / volatility | +674.4% | 14.16% | 0.75 | -35.76% | +28.40% | +5.95% |
| Quality 100Balance-sheet and earnings quality | +664.4% | 14.07% | 0.75 | -33.22% | +12.42% | +3.47% |
| RSP (equal-weight S&P 500) real ETF, dividends reinvested | +467.6% | — | — | — | — | — |
All three beat the benchmark (+467.6%) on cumulative return over fifteen years, but cumulative return is not the proof: the benchmark carries the bias explained below. The weakest is Value 100, with an alpha of -0.63%: negative, meaning what it earns does not pay for the market risk it takes to earn it. Publishing the figure that comes out worst is the only reason the others deserve any credit.
That benchmark is a fund you can buy
The +467.6% in the row above is RSP, the equal-weight S&P 500 ETF, with dividends reinvested and its management fee already deducted. It is the fair comparable because the portfolios also weight every holding the same, and it already carries what happened to the companies that left the index, because the fund actually sold them. The portfolios, by contrast, are measured with no trading costs, and that asymmetry flatters them.
Over this same window and measured the same way, SPY, the plain cap-weighted S&P 500, returned +676.5% (14.10% a year). Beating RSP but not SPY means the edge is in picking well inside the index, not in avoiding the concentration in the seven giants.
How much does trading take? It is measured, though not for these three: costes_estimados.json computes it on multi-factor 20, and in the cheapest scenario (a 100,000 EUR account held in dollars, 0.50 EUR a trade, no currency conversion) it comes to between 164 and 204 basis points a year, which turns its 17.13% gross into 14.74-15.20% net. It is an upper bound: the spread is not measured but estimated, and both estimators run high on liquid names. Measured on 27-Aug-2026 with data through 17-Aug-2026.
Source: carteras.json · index based at 100 on 4-Mar-2011. Walk-forward with point-in-time data: on each date scoring uses only prices up to that day and fundamentals already filed with the SEC. 185 rebalances through 17-Aug-2026.
06The rotation between factors
How far momentum is ahead today, and what happened the other times the gap opened this wide. Six-month window ending August 17, 2026.
Over the past month the value portfolio gained +4.27% while momentum gained +5.95%. Across that six-month window the benchmark rose 9.7%, so this is not the whole market moving: it is a rotation inside one.
The extreme of the series is July 9, 2020, six years ago, at +27.9 points. And what happened after each extreme? Counted, not assumed: of the 4 extremes in momentum's favour with enough data after them, in 4 the lead had flipped sign six months later; of the 5 extremes in value's favour, in 3. That is a count over 9 episodes, not a rule.
Why this is not a forecast
179 overlapping windows are not 179 independent observations: each shares five of its six rebalances with the next, so any series looks mean-reverting whether it is or not. All that can be claimed is descriptive: the gap between the two factors is +6.2 points and last month belonged to Momentum 100. What happens next month is not in this data.
Computed from carteras.json · 185 monthly rebalances between 4-Apr-2011 and 17-Aug-2026 (fifteen years) · 179 overlapping windows of 6 rebalances · recent stretch: the last 24 rebalances, the shortest run that still holds 4 non-overlapping windows.
07What is coming: who reports next
3 S&P 500 companies on September 1, 2026, out of 28 across the whole market.
With the rank and the score they carry before reporting. Section 03 will publish the after once the document reaches EDGAR, which is zero to three days later: the press release does not move our scores, the filed accounts do.
| Company | When | Rank | Multi-factor |
|---|---|---|---|
| DELL Dell Technologies Inc. | after the close | #22 | 5.9 |
| PANW Palo Alto Networks, Inc. | after the close | #256 | 4.9 |
| MDT Medtronic plc | before the open | #339 | 4.7 |
Source: calendario_resultados.json · Nasdaq public earnings calendar. Earnings date announced by each company, not the SEC filing date, which is not published in advance. Scores from the 28-Aug-2026 ranking.
08The limits, and what they teach
A fixed section. Knowing where a model stops is worth as much as knowing what it gets right.
- What insiders did yesterday. Form 4 can be filed up to two business days after the trade, so the freshest data is always the day before last.
- Whether momentum keeps winning. Fifteen years and 185 rebalances are not enough to claim a factor mean-reverts. We can describe what happened, not what comes.
- What any company is worth. This report computes no price targets. No Monte Carlo, no DCF, no fair value. When you see one elsewhere, ask which cost of capital discounted it and who chose that number.
- Whether the S&P rises tomorrow. We measured it with the same model (139 variables) and the same walk-forward protocol, over 1,067 out-of-sample sessions: the model calls direction right 53.98% of the time and saying "up" every single day is right 53.89%. The gap is noise: there is no signal, so we don't sell one. Both figures are recomputed every edition.
Next: What the S&P 500 is · today's ranking · all the guides.
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This is not investment advice. Quant500 publishes data and its historical reconstruction. No figure here is a suggestion to buy or sell, nor does it account for your personal situation.
Closing levels of ^GSPC, ^VIX and ^TNX (Yahoo Finance) · session of 28-Aug-2026.
Report generated automatically on August 31, 2026 from the server's data files. Each section states its own cut-off date, which is not always today.
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