The week in the US stock top 1000
Week 40, 2026
2026-09-28 to 2026-10-02: the board at the close of 2026-10-02 against the board at the close of 2026-09-25, and how the week compares with the year. A trading day's board is taken at its close, each company at its last trade on IEX in the regular session. See the board as it stood on 2026-09-25, or follow that week's top 100 and press play.
Contents: the total · how the companies did · the indicators · industries · movers · entered and left · method
The board's total
The top 1000's market cap, trading day by trading day over the year of trading to 2026-10-02. This week is shaded.
▼0.2% to $79.16T, after a rise the week before and the 22nd biggest of the year's 25 falls; 1.2% below the year's high of $80.12T on 2026-08-13. Across the year's 52 weeks the biggest rise was ▲4.8%, in the week to 2026-04-17, and the biggest fall ▼2.7%, in the week to 2026-06-05.
Who moved it
Every company's market-cap change over the week, a company that entered the top 1000 counted in full and one that left counted out in full. Each company's share of its side is on the right.
Nvidia Corp +$216.0B, 19% of the $1.11T the risers added; Space Exploration Technologies Corp. +$135.0B was 12%. The fallers took $1.24T away, Apple Inc. the most at −$106.0B.
How the companies did
The week's price change of every company ranked at both ends of it, in bins; the bin of the top 1000 as one index is marked. Under it, the change of the middle company in each hundred of the board, by where a company started the week.
41% of companies up: 91 of the 986 gained 5% or more and 92 lost that much. The top 1000 as one index did ▼0.2%, the middle company ▼0.7%, the total ▼0.2%. By starting rank, ranks 901 to 1000 did best, its middle company ▲0.5%, and the top 100 worst, ▼1.3%.
The indicators
Breadth, market correlation, dispersion and the top 10's share at the close of 2026-10-02 against 2026-09-25, each placed in the year, with its chart on the today page. Then the board on the stock indicators page's fourteen, one number per company per trading day: the middle company of the top 200 at both closes, and how those companies split across each indicator's zones, this week's close from the week before's. A row opens the chart as it stood on 2026-10-02.
25% of companies above their price 30 trading days earlier, from 23% a week earlier: higher than on 3% of days this year. The year's range is 20% (2026-09-28) to 79% (2026-01-06). live chart
Market correlation 0.08, up from 0.07 a week earlier: higher than on 32% of days this year. The year's range is 0.03 (2026-07-28) to 0.31 (2026-04-14). live chart
Dispersion 2.1%, down from 2.2% a week earlier: lower than on 54% of days this year, the narrowest since 2026-04-27. The year's range is 1.6% (2025-12-31) to 3.1% (2026-08-04). live chart
The top 10 37.4% of the board, up from 37.0% a week earlier: higher than on 96% of days this year, the most since 2026-05-18. The year's range is 33.8% (2026-06-25) to 38.0% (2025-10-29). live chart
| Indicator | 2026-09-25 | 2026-10-02 | The zones on 2026-10-02, from 2026-09-25 |
|---|---|---|---|
| RSI, 14 days | 46.7 | 44.0 | overbought 3% · strong 16%, from 12% · weak 27%, from 28% · oversold 10%, from 6% |
| MACD against its signal line | −0.18% | −0.19% | above the signal line 37%, from 40% · below the signal line 64%, from 60% |
| Distance from the 90-day average | ▼1.2% | ▼1.9% | above the average 43%, from 44% · below the average 57%, from 56% |
| Below the 90-day high | ▼10.9% | ▼11.1% | within 5% of high 16%, from 19% · 20 to 40% below 14%, from 13% · 40% or more below 2%, from 1% |
| Change over 30 days, against the top 1000's | ▼3.6% | ▼3.5% | beat the top 1000 32%, from 39% · trailed the top 1000 68%, from 61% |
| Up days in the last 30 | 47% | 47% | more up than down 41%, from 40% · more down than up 59%, from 60% |
| Volatility, 30 days | 1.6% a day | 1.6% a day | 4% a day or more 7%, from 8% · under 1% a day 10%, from 9% |
| Correlation to the top 1000, 90 days | 0.18 | 0.19 | above 0.7 0% · below 0 33%, from 35% |
| Beta to the top 1000, 90 days | 0.38 | 0.40 | 2 or more 14% · above 1 20%, from 21% · below 0 33%, from 35% |
| Volume, the week against the month before | 1.2x | 1.1x | 2x or more 6% · half or less 0%, from 1% |
| Volume on up days | 47% | 47% | more on up days 36%, from 35% · more on down days 64%, from 65% |
| Days above or below the 90-day average | 4 days below | 5 days below | above the average 43%, from 44% · below the average 57%, from 56% |
| Distance from the 200-day average | ▲2.0% | ▲2.0% | above the average 55%, from 61% · below the average 45%, from 39% |
| Below the one-year high | ▼12.7% | ▼13.8% | within 5% of high 13%, from 14% · 25 to 50% below 19%, from 16% · half or more below 2% |
Change over 30 days, against the top 1000's: 32% of the top 200 beat the top 1000, from 39% the week before, the biggest shift across the fourteen indicators' zones.
Industries
The companies ranked at both ends of the week grouped by the industry the SEC files each under, its SIC code's name, and the price change of each industry's middle company. Industries with at least 15 companies. The last column is the industry's place the week before.
Semiconductors & Related Devices ▲4.4% was first for the second week running; Services-Business Services, NEC was last at ▼2.6%. In the 56 weeks so far, the industry that was first stayed first the week after 8 times, and of a week's five best industries, typically 2 were among the five best the week after.
The movers
A climb from 40th to 10th counts the same as one from 400th to 100th. The number in brackets is how many places a company that started the week in the same hundred of the board usually moves in a week, up or down. On the right, the market-cap change over the week. Below them, the biggest market-cap changes themselves, since the rank lists come mostly from the small end of the board.
Climbed the most
In the 56 weeks so far, the fifty biggest climbers of one week typically did ▲0.2% the week after, and the middle company of the board ▼0.1%. The climbers did better than the middle company in 32 of those weeks.
Fell the most
In the 56 weeks so far, the fifty biggest fallers of one week typically did ▲0.1% the week after, and the middle company of the board ▼0.1%. The fallers did better than the middle company in 33 of those weeks.
Grew fastest
Shrank fastest
Entered and left
On the board at the end of the week and not at the start, and the other way round; the highest-ranked of each.
Entered the top 1000 · 14
Left the top 1000 · 14
14 in, 14 out. 452 companies climbed in rank, 456 fell and 78 held. Accenture plc (from #103) and Snowflake Inc. (from #102) entered the top 100; Capital One Financial Corp and Lockheed Martin Corporation left it.
Method
A trading day's board is the 1000 largest US-listed companies by market cap at its close: each company at its last trade on IEX in the regular session, times the latest share count it reported to the SEC on or before the day; ranks are positions on that board. An issue compares the close of its week's last trading day, usually a Friday, with the close of the week before's, and is rewritten only when a fix to the ranking rules rewrites the days it reads. Every sentence on the page is written from the numbers by a fixed rule; nothing is edited by hand. Every past day was ranked from that day's own prices and counts; details on the about page.
A reading is placed in the year of trading, 252 trading days, ending on the issue's close. "Higher than on 92% of days this year" counts the trading days in that year with a lower value, and "the most since" names the last day before the week when the reading was at least this high, or this low for a falling one; it is left out when that day is within a fortnight. Weeks are numbered as ISO weeks, Monday to Sunday. For runs and places the year's weeks run close to close: a run counts consecutive weeks moving the same way, and a week's place ranks its move against the year's other weeks in that direction.
IEX doesn't trade every company every day, and a company it didn't trade isn't ranked that day, so each end of the week is the top 1000 by market cap among the companies on that day's board plus any the board missed in the four trading days before while its last market cap was at least twice the smallest on the board, each at its latest market cap and price; a rank is a position in that list. A missed day never reads as a departure, and a company that slipped past the cutoff leaves at once. The companies that entered are the ones in the end list and not the start list, and the companies that left the other way round, so the two counts are equal. Who moved it is each company's market cap at the end of the week less its market cap at the start, a company that entered counted in full and one that left counted out in full; the risers' sum and the fallers' sum are reported as they are, and their difference is close to but not exactly the total's move. A company's market cap also moves when it reports a new share count.
Price changes are taken over the companies ranked at both ends of the week, a price before an official split divided by its ratio; the middle company is the median, half the companies above it and half below. A hundred with fewer than ten such companies does not compete for best or worst, and the bottom hundred is biased upward, because the companies that fell out of the top 1000 during the week are not in it. The top 1000 as one index is the board's own: each trading day, the change of every company on the board the day before, weighted by its market cap, so companies coming and going and share counts changing do not move it. Industries are the ones the SEC files companies under, the names of their SIC codes, with at least 15 companies.
Breadth is the share of the board priced higher than 30 trading days earlier, over the companies that had a price then. Market correlation is the mean correlation of daily changes, pair by pair, among the 50 largest companies at the issue's close, over the last 30 trading days; dispersion is the spread of a trading day's changes across the 100 largest, averaged over the last 30 trading days; the top 10's share is the 10 largest companies' market cap as a share of the top 1000's. The today page draws each of the four over the year and reads it on the latest trading day. The volume is IEX's own, a slice of the whole market's, so nothing here is read from it.
The fourteen indicators are computed as on the stock indicators page, from the trading days alone, and are defined on the about page. At each close the middle company is taken among the top 200 over the companies with a value that day, leaving out only a company that moved less than 0.25% a day over the last 30 trading days; a day with fewer than 20 such companies has no value. The zone shares are over the same companies at each close, and the shift the reading names is the zone whose share moved the most between the two, on any of the fourteen.
Three readings look back over every close-to-close week the dataset holds up to this issue. The fifty biggest climbers and fallers of a week are followed into the week after: the price change of the middle company among them, and of the middle company of the whole board, each the middle value over those weeks ("typically"), with the count of weeks in which the group did better than the board. The number in brackets after a move in the movers lists is the middle value, over the same weeks, of how many places a company that started the week in the same hundred of the board moved, up or down. The industry readings count, over consecutive weeks with at least eight industries in common, how often the first industry stayed first, and how many of a week's five best industries were among the five best the week after.