Shared finance report

How did the US stock market perform today, including the major indices, the biggest movers, and what drove them?

September 23, 2026

Research Report

Question: You are a rigorous financial research analyst. Ground EVERY quantitative claim in data you actually pulled from the finance tools — never invent a price, multiple, or indicator. Answer the REQUEST below by:

  1. Identifying the specific publicly-tradable assets (tickers) it concerns. When the request is open-ended (e.g. "top up-and-coming tech companies"), first find concrete candidates: use finance_data (action=search) to resolve names to tickers, and web search / the browser for qualitative discovery.
  2. For EVERY ticker you discuss, pull real data with the finance tools:
  1. Writing a concise report: a short investment thesis for each asset (why it is interesting, grounded in the pulled price/fundamentals/news/insider data), then a summary table with columns: Ticker | Price | 1d% | 5d% | 20d% | RSI | P/E | Trend. Rank assets by thesis strength, cite notable news/insider signals, and clearly flag any ticker you could not fetch.

REQUEST: How did the US stock market perform today, including the major indices, the biggest movers, and what drove them?

Date: 2026-09-23T04:54:19.521411918+00:00

Coverage window: 2026-09-23 – 2026-09-23

Rounds: 1

Status: PARTIAL

Objective check — 0 of 5 criteria met

The run produced work, but the objective below is not fully achieved. Each unmet criterion names what is still outstanding.

Evidence: 116 claims · 56 sourced · 8 partial · 6 unsupported · 45 self-reported (no independent source) · 20 single-source

Executive Summary

As of 2026-09-23, there is no US stock-market session to report. At retrieval the browser clock read Wed Sep 23 2026 00:47:37 EDT — roughly nine hours before the 09:30 ET opening bell — and every symbol pulled from the market-data tools terminated at the 2026-09-22 13:30 UTC bar. The newest news item available anywhere was timestamped 2026-09-23 04:38:46 UTC (00:38 ET), still pre-open. So there is no 2026-09-23 index close, no 1-day move, no biggest-mover list, no sector winner/loser, and no "what drove them" to give you: no dated in-window source found for any of them.

What follows is the last real evidence: the 2026-09-22 session (labeled background, outside the window), the thin set of 2026-09-23 pre-open items, and an explicit list of what failed to fetch. Nothing here is filled from memory.

The Last Completed Session — 2026-09-22 (background, out of window)

On 2026-09-22 the tape split cleanly: tech made a record, banks and the Dow bled, and the S&P finished flat. Investopedia's wrap, stamped Updated September 22, 2026 04:08 PM EDT, states the Nasdaq closed +0.5% at a second straight record while JPM, AXP and V were among the Dow's biggest decliners and the S&P 500 "ended essentially flat" (investopedia.com).

Index / proxyClose (2026-09-22)1-daySource
S&P 500 (^GSPC)7,764.64 (prior close 7,764.70)−0.001%statmuse.com
Nasdaq Compositelevel not fetched+0.5%, record closeinvestopedia.com
Nasdaq-100 (NDX)30,732.40+0.82%tool (finance_data analyze)
Dow (^DJI)51,863.69 (−185.14 pts)−0.36%stockmarketwatch.com
Russell 2000not fetched; IWM proxy 287.21+0.57% (IWM)tool
VIX14.21−4.44%tool

Sector rotation, 2026-09-22 (tool panel): best XLB Materials +1.65%; worst XLF Financials −1.97% (which is why the Dow lagged — financials led its decliners). Full spread was ~3.6pp, an unusually wide rotation day.

ETF1d%ETF1d%ETF1d%
XLB+1.65XLI+0.17XLC−1.06
XLP+0.99XLY+0.09XLE−1.09
XLK+0.73XLRE−0.21XLF−1.97
XLV+0.52XLU−0.32

Biggest movers, 2026-09-22 (background only — these are NOT 2026-09-23 figures): gainers MMM +3.70% ($148.62), NVDA +1.77% ($225.01), JNJ +1.61%, CSCO +1.33% (stockmarketwatch.com); LEN +6.5% on Berkshire disclosing ~2.75M shares, ONON +8.5% on 2029 targets and a first buyback, AZO +6% on a profit beat, SNDK +6% on a Rosenblatt Buy/$2,400 initiation (MU +3%), Cleveland-Cliffs +5%. Losers: RCL −6% on an FT report of a Sandals Resorts stake, Fastly −7% post-Investor Day, Cisco −6% while tech rose, Pinterest −5%, Trade Desk −4% on index-removal flows, JPM −3% (investopedia.com).

What Was Actually Dated 2026-09-23 (pre-open)

Every in-window item below predates the open, so none can be called the driver of a session that never traded. They are the setup, not the result.

Time (UTC)ItemRelevance
04:38Dutch final Q2 GDP +0.6% q/q (f'cast 0.4%), +1.6% y/yEurope macro (link)
04:31Seoul to finance a $22bn gas-fired plant in Texas toward a $350bn US pledgeUS power/industrial capex (link)
04:03China examines Broadcom hardware in state-backed data centersNegative read for AVGO (link)
02:23Anthropic in talks for up to 1GW data-center lease (Stream)AI-infra demand (link)
02:19Iran says US engagement in New York ran via a Qatari intermediaryGeopolitical de-escalation (link)
01:583 commodity ships passed Hormuz vs a 10-day average of ~15Energy supply (link)

The only dated 2026-09-23 index figure found anywhere is a contract-for-difference quote: US500 at 7,773, +0.11%, dataset version 20260923 (tradingeconomics.com). It is a CFD proxy, timestamped 12:00 UTC (08:00 ET) — pre-open, therefore not a cash close, and not usable as the day's result.

Do not use these pages as a 2026-09-23 recap: weeklytrader.io/gainers.php (self-timestamped "Last updated 4:48 AM UTC" with implausible levels: VZ $309.26, PFE $387.45, WMT $438.82), premarketprice.com/premarket-movers (self-dated Sept 23 but describes a pre-market that had not started, and its list violates its own descending-% ordering), and vittarthi.com/markets/us (renders as an empty shell; its "10:00 IST" stamp equals 00:30 ET).

What Could Not Be Fetched (flagged, not filled)

ItemStatus
^GSPC, ^IXIC, ^DJI, ^RUT, ^VIX, ^SPXnot fetched — "no data … on any exchange" across 14 venues
SPY, QQQ, DIA, IWM, XLF, XLREconflicting runs: resolved on some calls (SPY 773.38; QQQ 747.46; DIA 518.00 AMEX; IWM 287.21; XLF 54.80) and returned "no data" on others. DIA also mis-resolved once to an LSE line (548.00, volume days as low as 2,268 shares) — that value is unusable
Biggest gainers/losers for 2026-09-23not fetched — no 2026-09-23 price data exists; get_top_movers returned crypto tokens only
Sector best/worst for 2026-09-23not fetched
P/E for every tickernot fetched — no fundamentals call returned data
finance_data quote source=pythfailed — HTTP 401 Unauthorized
finance_newsrate-limited (HTTP 429) on repeat calls
TickerPrice1d%5d%20d%RSIP/ETrend
SPY773.38−0.02+2.11+1.3058.3not fetchedstrong_uptrend
QQQ747.46+0.81+6.09+5.8368.0not fetchedstrong_uptrend
NDX30,732.40+0.82+6.20+5.8968.0not fetchedstrong_uptrend
DIA518.00−0.34−0.62−2.9341.1not fetcheddowntrend
IWM287.21+0.57+0.73−3.6141.7not fetcheddowntrend
VIX14.21−4.44−17.38−10.3543.0n/astrong_downtrend
XLB50.53+1.65−0.39−5.6942.3not fetcheddowntrend
XLF54.80−1.97−3.61−5.8729.9not fetcheddowntrend

Every value in that table is the 2026-09-22 close, not 2026-09-23.

Analysis

The absence is itself the finding, and it is well corroborated: ~20–40 independent US symbols, across daily and intraday intervals, agree on a 2026-09-22 13:30 UTC cutoff, while the one 24/7 series (BTCUSD) carries a 2026-09-23 bar at $87,106.63. That is the signature of a session not yet traded or not yet ingested — the clock check (~00:47 ET) confirms the former.

The right way to read the 2026-09-22 setup: narrow, tech-led strength against a weak cyclical/financial tape. QQQ sat at 99.4% of its 52-week range with RSI 68 and a strong_uptrend label, while IWM sat below both its SMA-50 (294.81) and VWMA-20 (290.10) with RSI 41.7 and a downtrend label, and XLF printed RSI 29.9. VIX at 14.21 and down 17.4% on five days was the confirmation that this was a melt-up in large-cap tech, not broad risk appetite.

The 2026-09-23 pre-open flow leaned the same direction but for a different reason: softer oil on US–Iran de-escalation hopes (Hormuz transit flows at 3 ships vs a ~15 average; Iran talking via Qatar) is a disinflationary input that flatters long-duration tech and pressures energy — consistent with the 2026-09-22 pattern of XLE −1.09% and XLK +0.73%. That is a hypothesis for the 2026-09-23 open, not a report of the 2026-09-23 session.

Risks & Open Questions

Claims without independent support

These statements appear in the narrative above but are not backed by text retrieved from a source. SELF-REPORTED means the only thing asserting it is the swarm's own worker output — the narrative was written from that output, so it corroborates nothing. Treat all of these as unverified.

Detailed Findings

Round 0 · Finding 1

US Equity Market Recap — Session of Wednesday, 2026-09-23

⚠️ HEADLINE FINDING: THE 2026-09-23 US SESSION IS NOT YET IN THE RECORD

The single most important, verifiable fact in this report is negative: no data source I could reach contains a completed 2026-09-23 US cash-equity session. Every tool call I made returned a last completed bar of 2026-09-22, and every news item in the window is timestamped before the 13:30 UTC (09:30 ET) US open.

Evidence:

Consequently, the mission's core deliverable cannot be honestly produced: I cannot state a 2026-09-23 closing level, 1-day return, biggest movers, or sector winners/losers for a session that has not been reported. Per the mission's own anti-goals ("Do NOT invent, extrapolate or round-trip index levels, % changes…"), I am flagging this rather than filling it. Anything I wrote as a "2026-09-23 close" would be a fabricated number.

What I can ground: the last completed session (Tuesday 2026-09-22) from live tool data, and the dated 2026-09-23 pre-open news flow. Both are labelled as such below.

1. Executive Summary

…(truncated — the summary above captures the substance)

Round 0 · Finding 2

Cross-Asset Moves, 2026-09-23 — Research Findings

0. Headline finding (read this first)

The toolset contains no 2026-09-23 US equity-session data. Every US equity, ETF, sector, Treasury-yield, dollar and commodity series I pulled terminates at the 2026-09-22 13:30 UTC bar (the 2026-09-22 cash close). The only 2026-09-23-dated price bar available anywhere in the toolset is BTCUSD. I could not verify a single 2026-09-23 index close, sector return, Treasury yield, DXY print, WTI/gold print, or equity mover.

Per the mission constraint ("any ticker or index that cannot be fetched must be explicitly flagged as unfetchable rather than filled with a plausible value"), I am reporting this as a negative result rather than reconstructing the session from memory or from the 2026-09-22 wrap.

Verification of the cutoff (all from finance_data action=analyze/history/quote):

1. The cross-asset instruments requested — fetch status

Requested instrumentSymbol(s) attemptedResult
US 10-year Treasury yield^TNXNOT FETCHED — "no data … on any exchange"
US 2-year Treasury yield^UST2Y (not resolvable), ^IRX (13-wk bill proxy)NOT FETCHED — ^IRX returned no data
5-yr / 30-yr yields (context)^FVX, ^TYXNOT FETCHED
US Dollar Index (DXY)DX-Y.NYBNOT FETCHED
WTI crudeCL=FNOT FETCHED
Brent crudeBZ=FNOT FETCHED
GoldGC=FNOT FETCHED
Bitcoin spotBTCUSDFETCHED — see §2
Ethereum spotETHUSD, ETH-USD, ETH=FNOT FETCHED
Crypto via Pyth (as instructed)BTCUSD,ETHUSD with source=pythFAILED — hermes: HTTP Error 401: Unauthorized

Net: 9 of the 10 cross-asset instruments in the sub-question are unfetchable. The entire "transmission mechanism" set — rates, dollar, oil, gold — is missing, so I cannot state what moved in them on 2026-09-23, in either direction.

2. What I did retrieve

2.1 Crypto (the one in-window datapoint)

finance_data action=quote, BTCUSD, source=auto (resolved to FOREXCOM), last bar 2026-09-23 00:00:00:

Caveat I am flagging rather than hiding: the tool returns the field labelled change_pct_1 without naming its reference bar. Given the series' last bar is 2026-09-23, this most plausibly is the 2026-09-22→2026-09-23 move, but the tool does not label the base bar, so treat the "+1.05% on 2026-09-23" attribution as probable, not certified.

…(truncated — the summary above captures the substance)

Round 0 · Finding 3

US Equity Market Recap — Session of Wednesday, 2026-09-23

0. Headline finding (read this first)

I could not verify a single 2026-09-23 session data point — index level, 1-day return, mover, sector move, or RSI — from any tool or source I was able to reach. Every quantitative slot the mission asks for is reported below as not fetched, not as a placeholder number. Two independent lines of evidence say the 9/23 session is simply not in the data:

  1. The finance tools stop at 2026-09-22. finance_data (action=analyze, interval=1d) returned last_bar: "2026-09-22 13:30:00" for SPY, QQQ, DIA and IWM; finance_data (action=history, interval=1h) returned last_bar: "2026-09-22 19:30:00" — i.e. the final hour bar of the prior session, 15:30 ET. No 2026-09-23 bar exists in either interval.
  2. An independent price source also stops at 9/22. StatMuse's S&P 500 daily close table's most recent row is September 22 2026 (close $7,764.64); there is no September 23 row (https://www.statmuse.com/money/ask/s-and-p-500-close-by-day-in-2026).

I did not fill the gap from memory. Per the mission's own rule, unfetched = not fetched.

1. Executive Summary

…(truncated — the summary above captures the substance)

Round 0 · Finding 4

US Equity Market — Session Report for 2026-09-23

1. Executive Summary

The 2026-09-23 US equity session has not occurred. At the time of research the browser clock read Wed Sep 23 2026 00:47:37 GMT-0400 (ET) — i.e. 12:47 a.m. Eastern, roughly 8 hours 43 minutes before the 9:30 a.m. ET open. Verified directly: browser eval returned {"now":"Wed Sep 23 2026 00:47:37 GMT-0400 (Eastern Daylight Time)","et":"9/23/2026, 12:47:37 AM"}.

This is corroborated independently by the market-data feed. Every single symbol that finance_data action=analyze returned successfully carries last_bar: "2026-09-22 13:30:00" — the most recent completed daily bar is 2026-09-22. No 2026-09-23 bar exists anywhere in the feed (checked on SPY, DIA, XLK, XLF, XLE, XLV, XLY, XLP, XLI, XLU, XLB, XLRE, XLC, AAPL, MSFT, TSLA, AMZN, NDX, DJI).

Consequence: there are no 2026-09-23 closing levels, no 2026-09-23 1-day returns, no 2026-09-23 biggest movers, no 2026-09-23 sector rotation, and no 2026-09-23 catalysts to report. Producing them would require invention, which this task's anti-goals forbid. What follows is (a) that finding stated plainly, and (b) the last completed session — 2026-09-22 — as labelled background, which is the nearest real evidence and is the correct anchor for a pre-open briefing.

I did not meet several of the mission's success criteria (2026-09-23 index closes, 2026-09-23 movers, 2026-09-23 best/worst sector, two dated 2026-09-23 catalysts). They are unmeetable at this timestamp, not merely unfound.

2. Key Findings

#FindingConfidenceEvidence
1The 2026-09-23 US regular session had not opened when research ran (00:47 ET).Very highBrowser clock; feed last_bar = 2026-09-22
2The most recent completed session is 2026-09-22.Very highfinance_data analyze on 19 symbols, all last_bar: 2026-09-22 13:30:00
3On 2026-09-22 (background): S&P 500 "essentially flat", Nasdaq Composite +0.5% to a second straight record close, Dow −0.4%.HighInvestopedia, Updated September 22, 2026 04:08 PM EDT
4On 2026-09-22 (background): best sector XLB +1.65%, worst XLF −1.97%.Highfinance_data analyze, BATS/AMEX venues
5Two sites self-dated "September 23, 2026" publish pre-session or implausible data and are not usable as 2026-09-23 session evidence.HighDirect fetches (see §6)
6P/E was not obtained for any ticker (fundamentals endpoint not called within the tool budget).Certain—

3. Detailed Analysis

3.1 The timing problem, verified two ways

…(truncated — the summary above captures the substance)

Round 0 · Finding 5

US Equity Market Recap — Requested Session: 2026-09-23

1. Executive Summary

The requested session did not exist in any data source I could reach. Every US equity instrument I pulled through finance_data — indices, index proxies, ETFs and volatility — returned a final bar timestamped 2026-09-22, not 2026-09-23. The intraday series (15-minute, 1-hour) likewise terminate on 2026-09-22 (15m last bar 2026-09-22 19:45:00; 1h last bar 2026-09-22 19:30:00). The newest news item returned by finance_news is timestamped 2026-09-23T04:38:46Z — roughly 09:00 UTC before the 13:30 UTC (09:30 ET) US cash open.

Conclusion: at the moment of retrieval, the 2026-09-23 US cash session had not yet traded. There are therefore no 2026-09-23 closing levels, 1-day returns, or a 2026-09-23 VIX print to report. Rather than fabricate them, I flag them all as NOT FETCHABLE and present the most recent completed session — 2026-09-22 — clearly labelled as background, since 2026-09-22 falls outside the mandated 2026-09-23..2026-09-23 window.

Per the mission's non-negotiable constraints, I have not filled any 2026-09-23 cell with a plausible value.

2. Key Findings (with confidence levels)

#FindingConfidence
1No 2026-09-23 bar exists for any instrument in the finance_data feed; all daily series end 2026-09-22High — observed directly across 20+ symbols and 3 intervals
2The official index symbols ^GSPC, ^IXIC, ^DJI, ^RUT, ^VIX, ^SPX are unfetchable on every exchange attempted (NASDAQ, NYSE, AMEX, BATS, CBOE, TVC, SP, DJ, FOREXCOM, CME…)High — explicit error strings returned
3DIA, XLF, XLRE are unfetchable (tried AMEX, NASDAQ, NYSE and others)High — explicit error strings returned
4The most recent completed session (2026-09-22) closed with Nasdaq strength and Dow weakness, per third-party search snippetsLow–Medium — snippet only, pages not fetched, and out-of-window
5The 2026-09-23 newswires are dominated by overnight Asia/Europe and geopolitical items, not US session catalystsMedium — in-window FinancialJuice headlines retrieved

3. Detailed Analysis

3.1 Why the 2026-09-23 session is absent — evidence

The decisive evidence is the last_bar field on every successful series:

The SPX500 daily OHLCV array returned 30 explicit bars, the last being {"t": "2026-09-22 21:00:00", … "c": 7774.13}. There is no 2026-09-23 row.

…(truncated — the summary above captures the substance)

Round 0 · Finding 6

US Equity Market — Session Recap for 2026-09-23

1. Executive Summary

The single most important finding of this research is a data-availability finding, not a market finding.

At the time of analysis on 2026-09-23, no finance tool available to me returned a settled 2026-09-23 US regular-session bar. Every symbol I pulled from finance_data (indices, sector ETFs, single stocks) returned a last_bar of 2026-09-22 13:30 UTC — i.e. the prior day's close. The finance_news tool returned zero headlines (its financialjuice source returned HTTP Error 429: Too Many Requests, and yahoo returned an empty set). monocal__get_top_movers returned crypto tokens only, not US equities. monocal__find_trending_tokens(data_source=stocks) returned "No stocks tokens currently meet the trending criteria." The CNBC live-blog for the 2026-09-23 session, fetched at its most recent state, was still pre-market (last update "Wed, Sep 23 2026 12:18 AM EDT"), and the /2026/09/23/ CNBC URL returned 404.

Consequence: I cannot state the 2026-09-23 closing level and 1-day % change for the S&P 500, Nasdaq Composite, Dow Jones Industrial Average or Russell 2000 from a tool call, because that data does not exist in the tools at analysis time. Per the mission's non-negotiable constraint ("any ticker or index that cannot be fetched must be explicitly flagged as unfetchable rather than filled with a plausible value"), all four headline indices are flagged NOT FETCHED FOR 2026-09-23 and are given no fabricated value. What I can provide, fully sourced, is (a) the last settled session — 2026-09-22 — from finance_data, (b) the thin, dated 2026-09-23 fragments that do exist on the open web, and (c) an explicit list of every symbol that failed to fetch.

Confidence: High that the 2026-09-23 session data is unavailable from the tools (verified across ~40 symbol pulls). Low that any specific 2026-09-23 index level or % move can be stated — the one dated 2026-09-23 index number I found is a CFD proxy, not the cash index.

2. Key Findings (with confidence)

…(truncated — the summary above captures the substance)

Investigation Trail

Round 0

Sources

Trace Index

Tool-call traces are persisted under /srv/swarm_web_runs/run-1790138563622-0003/finance_output/traces.

This report was researched and written by a Swarmio run — a swarm of AI agents that searches the web, reads the sources, and shows its working.

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