Shared finance report

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

September 16, 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: 2026-09-16T04:51:18.511905428+00:00

Coverage window: 2026-09-16 – 2026-09-16

Rounds: 1

Status: PARTIAL

Objective check — 0 of 6 criteria met

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

Evidence: 193 claims · 36 sourced · 8 partial · 4 unsupported · 144 self-reported (no independent source) · 18 single-source

Executive Summary — as of 2026-09-16

There is no 2026-09-16 US session to report, and no dated in-window source for one was found. Every market-data series pulled returns a final bar of 2026-09-15: daily bars end 2026-09-15 13:30:00 UTC, 1-hour bars end 2026-09-15 19:30:00 UTC, and 15-minute bars end 2026-09-15 19:45:00 UTC. The newest headline in the news feed is stamped 2026-09-16T01:21:13Z — 21:21 ET on 09-15, before the US open — and it is an Asian overnight wire item, not US session news. The one page that advertises a "Sep 16, 2026" US close (https://vittarthi.com/markets/us) renders every 09-16 block — Key Indices, Market Wrap, Top Movers, Sectors, Breadth, Rates — as an empty placeholder; it is stamped "Generated: 16 Sep 2026 · 10:00 IST" (00:30 ET, pre-open) and its own footer says figures outside US hours "reflect the last completed session."

So: no index close, no % change, no movers, no sector performance, no VIX or 10-year print exists for 2026-09-16 in the sources reachable here. Per the no-invention rule I am not substituting the prior session as "today." The most recent completed session was Tuesday 2026-09-15, and it is reported below as labelled background only. What was scheduled into 2026-09-16 (August retail sales, the September FOMC decision) was still pending at data cutoff — its outcome is unknowable from this evidence, and no source states it.


1. Evidence that the 2026-09-16 session is not in the feed

ProbeTerminal barSource
finance_data analyze, 250×1d, SPX/IXIC/RUT/SPY/QQQ/DIA/IWM2026-09-15 13:30:00tool output
finance_data history, 30×1d, SPYlast bar 2026-09-15, close 757.39tool output
finance_data history, 1h, SPY2026-09-15 19:30:00tool output
finance_data history, 15m, SPY2026-09-15 19:45:00tool output
finance_news, 40 headlinesnewest 2026-09-16T01:21:13Z (Asia overnight, pre-open)financialjuice.com
Fetched "Sep 16" page, all data blocksempty; generated 00:30 ETvittarthi.com/markets/us
Fetched 09-16-dated outlook pageself-stamped "Updated September 15, 2026 at 09:19 PM ET"; says overnight tape and late Fed communication "not yet observable"strongbuyanalytics.com

No 2026-09-16 bar exists on any interval pulled, for any instrument. No dated in-window source describing the 2026-09-16 US close was found.


2. What was scheduled for 2026-09-16 (in-window dated, pre-session)

From the one fetched page carrying a JSON-LD datePublished of 2026-09-16T00:00:00+00:00 (strongbuyanalytics.com) — an outlook, written before the session:

Time (ET)EventStatus
08:30Advance Monthly Retail Trade Report (August retail sales)scheduled; existence not confirmed against any primary source
14:00September FOMC rate decisionscheduled; existence not confirmed against a primary source
14:30FOMC press conferencescheduled

3. Background only: the last completed session, 2026-09-15

These are 09-15 closes, not 2026-09-16 moves. All from finance_data at last_bar 2026-09-15 13:30:00.

Headline indices

IndexLevel1d%5d%20d%RSI-14TrendNote
S&P 500 (SPX)7,585.73−0.449%−1.144%−2.057%44.07downtrend52-wk pos. 84.6%
Nasdaq Composite (IXIC)25,981.57−0.782%−1.665%−2.490%45.27downtrend52-wk pos. 81.4%
Dow Jones (DJI)52,093.11−0.626%UNFETCHEDUNFETCHEDUNFETCHEDUNFETCHEDquote-endpoint only; a separate attempt returned "no data for DJI / ^DJI on any exchange"
Russell 2000 (RUT)2,870.29−0.759%−3.038%−6.124%34.60downtrend52-wk pos. 74.0%

Index ETFs and cross-asset (09-15)

TickerPrice1d%5d%20d%RSIP/ETrend
SPY757.39−0.459%−1.119%−1.978%44.41 (a 30-bar retry said 37.81 — unresolved)n/fdowntrend
QQQ704.54−0.654%−1.924%−3.470%43.98n/fdowntrend
DIA521.23−0.622%−1.288%−2.426%40.58n/fdowntrend
IWM285.14−0.962%−3.234%−6.222%33.94n/fdowntrend
VIX17.20+0.585%+9.415%+13.232%55.61n/auptrend
TNX (10-yr, %)4.995+0.665%+3.954%+5.714%n/fn/an/f

P/E is n/f in every row — no finance_data action=fundamentals call returned data, so no valuation multiple in this report is sourced. VIX/TNX are TradingView (TVC) feed proxies, not the CBOE index print or the official Treasury par yield; the 10-year sat at the 98th percentile of its 52-week range (3.947–5.016). A separate ^TNX quote read 4.996%, +0.705%, intraday range 4.987–5.016%.

Sector SPDRs (09-15 close)

TickerSectorPrice1d%5d%20d%RSITrend
XLEEnergy65.93+2.170+1.791+5.35367.27strong_uptrend
XLBMaterials50.73+0.475−2.330−2.89138.76downtrend
XLVHealth Care167.66−0.054+0.317+0.36547.65strong_uptrend
XLREReal Estate43.07−0.116−1.891−3.92634.72downtrend
XLKTechnology183.74−0.293−2.198−3.45747.83strong_uptrend
XLFFinancials56.85−0.316−0.785−1.26844.65downtrend
XLIIndustrials168.85−0.636−3.193−9.37630.54downtrend
XLPCons. Staples83.73−0.817−0.345−1.12243.76downtrend
XLCComm. Services114.03−0.904+2.251+2.89757.15uptrend
XLUUtilities41.32−1.196−4.902−6.47429.98strong_downtrend
XLYCons. Disc.110.88−1.746−2.728−5.02835.31strong_downtrend

09-15 leaders: XLE +2.17% (at 99.0% of its 52-week range — essentially a 52-week high) and XLB +0.48% were the only sectors up. 09-15 laggards: XLY −1.75% and XLU −1.20% (XLU at ~0.5% of its 52-week range). Over five days the dispersion runs XLC +2.25% against XLU −4.90%.

Named single stocks pulled (09-15)

TickerPrice1d%5d%20d%RSITrend
NVDA212.17+0.574%−6.007%−5.706%45.07downtrend
TSLA356.58−0.666%−3.145%+5.093%50.42uptrend
MRVL221.70+1.316%−1.646%−5.390%49.40strong_uptrend

Conflict flagged

The fetched outlook page claims Tuesday's leaders were XLC +2.19% and XLV +1.45%, with SMH −4.75%, XLK −1.81% and NVDA −3.36% weak (strongbuyanalytics.com). That contradicts the tool data on the same session — XLC −0.904%, XLK −0.293%, NVDA +0.574%. The tool values are treated as authoritative; the page's single-stock and sector figures are unreconciled secondary claims and no NVDA −3.36% claim is made here. Its VIX 17.21 and 10Y 4.996% do corroborate the tool reads of 17.20 and 4.995%.


4. Unfetched register

Requested itemStatus
2026-09-16 close / % change — any index, sector, ETF, single stockdoes not exist in reachable data
^GSPC, ^IXIC, ^DJI, ^RUT (caret forms)UNFETCHED — "no data on any exchange"
DJI full indicator panel (5d/20d/RSI/trend)UNFETCHED (only a quote-only level of 52,093.11)
^VIX, ^TNX, DX-Y.NYB, CL=F, GC=FUNFETCHED on all 18 exchanges attempted; bare VIX/TNX resolved as TVC proxies
P/E, forward P/E, PEG, margins, revenue growth, analyst targetsUNFETCHED for every ticker — no fundamentals call returned data
Realtime spot via quote source=pythUNAVAILABLE — HTTP 401
Biggest movers of 2026-09-16UNFETCHED — no screener and no in-window prices
Macro/Fed/earnings outcome for 2026-09-16no dated in-window source found for either release's result
Congressional trades (09-16)UNVERIFIED — free API returned a 503; the browser fallback served a Wayback snapshot dated 2026-05-31 whose newest trades are from 15 May 2026

Analysis

The blocking issue is timing, not instrument coverage. Three independent paths agree the observation point sits at 21:21 ET on 09-15 / pre-open on 09-16: the bar-series terminal timestamps, the news-feed timestamp, and the fetched page's "Generated 16 Sep 2026 · 10:00 IST" stamp with empty data blocks. Any 2026-09-16 recap would have to come from memory, which is exactly the failure mode this exercise forbids. Note also that one page titled for 09-16 data renders every 09-16 field blank — a confident, specifically-dated secondary source with no underlying session data, i.e. the trap rather than the evidence.

The last completed session is worth reading only as context for what the 09-16 catalysts landed into: a broad risk-off day on 09-15, with all four size buckets down, small caps worst (IWM −0.96% / −6.22% over 20 days, RSI 33.9), volatility firming (VIX +9.4% over five days), and a 10-year yield at ~4.99%, the 98th percentile of its 52-week range. Within that, the rotation was distinctly energy-and-materials bid against utilities and consumer discretionary sold — XLE at a 52-week high, XLU at a 52-week low, XLY the day's worst sector on a strong_downtrend label. That is more consistent with a commodity/inflation impulse than with classic broad de-risking, and it is the setup a 14:00 ET Fed decision on 09-16 would have been read against. No source available here reports how that read resolved.

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 2026-09-16: NO SESSION DATA EXISTS YET

1. Executive Summary

The requested 2026-09-16 session recap cannot be produced, because as of every data source I could reach, the 2026-09-16 US equity session had not yet occurred. The last completed session in finance_data is 2026-09-15. I am reporting that as clearly-labelled prior-session background only, and I am flagging the four headline indices as UNFETCHED for 2026-09-16 rather than passing off 09-15 numbers as "today's move."

Three independent lines of evidence converge on this:

  1. finance_data bar timestamps. Every analyze and quote call for SPX, IXIC, RUT and DIA returned "last_bar": "2026-09-15 13:30:00" (13:30 UTC = 09:30 ET, the session open). The 1-hour OHLCV series ends at "2026-09-15 19:30:00" (= 15:30 ET, the final hour of the 09-15 session), with the final bar's close exactly equal to the daily-bar close. No 09-16 bar exists on any interval I pulled.
  2. A page generated on 09-16 IST time shows empty 09-16 sections. https://vittarthi.com/markets/us carries the title "US Stock Market Today Sep 16, 2026 — S&P 500, Dow & Nasdaq Close," but every 09-16 content block — Key Indices, Market Wrap, Top Movers, Sectors, Market Breadth, Rates/Dollar/Commodities — renders as an empty placeholder. The page's own footer states: "figures shown outside US hours reflect the last completed session." Its 09-16 timestamp is "Generated: 16 Sep 2026 · 10:00 IST" (= 00:30 ET, pre-open).
  3. The 09-16 catalysts are still described as forthcoming. https://strongbuyanalytics.com/stock-market-outlook is headlined "Stock Market Outlook for Wednesday, September 16, 2026," is stamped "Updated September 15, 2026 at 09:19 PM ET," and states that "overnight Asia/Europe tape and any late-breaking Fed communication are not yet observable as of 9:18 PM ET," while listing the 08:30 ET retail-sales print and the 14:00 ET FOMC decision as scheduled events.

Corroborating the clock: the newest headline in finance_news is timestamped 2026-09-16T01:21:13Z (= 21:21 ET on 09-15), and it is Asian overnight news (PBOC reverse repos, yuan fixing, Japan trade data) — not US session news.

Consequence for the mission: the required closing levels, % changes, intraday high/low, 52-week range position, sector performance, VIX and 10-year yield for 2026-09-16 do not exist in any source I could reach. I will not fill that gap from memory.


2. Key Findings

Finding 1 — No 2026-09-16 session data available (Confidence: HIGH, ~0.9)

All four headline index symbols, in both caret and non-caret form, resolve to a last bar of 2026-09-15. See evidence above.

Finding 2 — Last completed session: 2026-09-15 (Confidence: HIGH for the finance_data values; these are PRIOR-SESSION, NOT "TODAY")

…(truncated — the summary above captures the substance)

Round 0 · Finding 2

US Equity Market Recap — Session of 2026-09-16

⚠️ HEADLINE FINDING: THE 2026-09-16 US SESSION IS NOT RETRIEVABLE

I could not obtain any price, % change, or index level for the 2026-09-16 US cash session. Every market-data series I pulled terminates at the 2026-09-15 session. I am therefore unable to produce the requested 2026-09-16 recap, and I will not present the prior session's numbers as "today's move" (explicitly prohibited by the task's anti-goals).

Evidence for this conclusion (all from tool calls, not memory):

ProbeResultTerminal timestamp
finance_data analyze, SPY, 250×1d barsOKlast_bar: 2026-09-15 13:30:00
finance_data history, SPY, 30×1d OHLCVOK, 30 explicit dated barslast bar 2026-09-15, close 757.39
finance_data history, SPY, 15mOK, 40 barslast_bar: 2026-09-15 19:45:00 (=15:45 ET)
finance_data history, SPY, 1hOK, 30 barslast_bar: 2026-09-15 19:30:00
finance_data quote, source=pythFAILEDhermes: HTTP Error 401: Unauthorized
finance_news, 40 headlinesOKnewest item 2026-09-16T01:21:13Z (Asia overnight, pre-US-open)

The 30-bar SPY daily history shows consecutive sessions 2026-09-08, 09-09, 09-10, 09-11, 09-14, 09-15 and stops. There is no 2026-09-16 bar — not a truncated one, not a partial one. The newest news headline anywhere in the feed is stamped 2026-09-16T01:21:13Z, i.e. ~21:21 ET on Sept 15. If the Sept 16 US session had closed, the wire feed would carry ~20:00–22:00 UTC Sept 16 post-close headlines. It does not.

Conclusion: the 2026-09-16 US session had not been captured by the data source at the time of this research. Confidence: HIGH.


1. Executive Summary

…(truncated — the summary above captures the substance)

Round 0 · Finding 3

US Equity Market — Session Recap Attempt for 2026-09-16 (Wednesday)

Executive Summary

The core deliverable could not be produced from live data, and I will not fill the gap. Every finance_data call I made returned a most-recent bar of 2026-09-15 (daily bars stamped 2026-09-15 13:30:00; hourly bars stamped 2026-09-15 19:30:00). No instrument in my pulls carries a 2026-09-16 bar. In addition, the index and index-proxy symbols failed to resolve entirely, so I have no S&P 500, Nasdaq Composite, Dow, Russell 2000, VIX, or US 10-year yield value for 2026-09-16 — and no value for any other date either, since those symbols never returned data.

Per the mission's own anti-goals, I am not presenting the 2026-09-15 readings as "today's" move. Everything below is explicitly labeled with its true as-of date, and every unfetched item is named.

Confidence that 2026-09-16 session data is absent from the finance tooling: High.


Key Findings

1. The 2026-09-16 US session is NOT in the finance_data dataset (Confidence: High)

Six separate finance_data action=analyze calls (daily and hourly intervals, multiple exchanges) all terminated at last_bar: 2026-09-15. Representative evidence: NVDA, TSLA, MRVL, XLE, XLP, VIXY all report "last_bar": "2026-09-15 13:30:00" on the 1d interval, and "last_bar": "2026-09-15 19:30:00" on the 1h interval. Because the task window is defined as 2026-09-16 through 2026-09-16, I have zero in-window price observations. This is either a one-session data lag or a mid-session pull; I cannot distinguish, and I will not guess.

2. Index-level data was entirely unfetchable (Confidence: High)

The following symbols returned "no data ... on any exchange" on every attempt, across NASDAQ, NYSE, AMEX, BATS, CBOE, TVC, SP, DJ, FOREXCOM, CME, CBOT and others:

Symbol attemptedResult
^GSPC, ^SPX, SPX500, US500 (S&P 500)UNFETCHED
^IXIC, ^NDX, NAS100 (Nasdaq)UNFETCHED
^DJI, US30 (Dow Jones Industrial Average)UNFETCHED
^RUT (Russell 2000)UNFETCHED
^VIX, VIX (CBOE Volatility Index)UNFETCHED
^TNX, US10Y (US 10-year Treasury yield)UNFETCHED
SPY, QQQ, DIA, IWM, TBT (index ETF proxies)UNFETCHED

finance_data action=search query="S&P 500 index" did resolve a canonical symbol — ^SPX / "S&P 500 INDEX" (CBOE) — but that exact symbol then failed to return bars. There is therefore no traceable index level, % change, VIX value, or 10-year yield for 2026-09-16 anywhere in this report. I flag this as a hard failure against the mission's success criteria rather than substitute an estimate.

…(truncated — the summary above captures the substance)

Round 0 · Finding 4

US Equity Market Recap — Session of 2026-09-16

⚠️ Bottom line up front: the 2026-09-16 session could NOT be sourced

This report cannot answer the question as asked, and I am not going to paper over that. Every quantitative pull I made from the finance tools returned a data series whose last bar is 2026-09-15, not 2026-09-16. The market-data feed behind finance_data is one session stale relative to the stated current date. Under the task's own anti-goals ("Do NOT present prior-day performance as 'today's' move"), I therefore refuse to label any figure below as the 2026-09-16 move. The only real session data I hold is the 2026-09-15 close, and it is presented here as BACKGROUND ONLY.


1. Executive Summary


2. Key Findings (with confidence levels)

…(truncated — the summary above captures the substance)

Round 0 · Finding 5

Cross-Asset Context for 2026-09-16 — Retrieval Report

Prepared: 2026-09-16 · Window: 2026-09-16 through 2026-09-16 (single session)


0. Bottom line (read first)

I could not obtain a single 2026-09-16 (in-window) value for any of the five requested instruments. Every finance_data series that resolved returned a last bar of 2026-09-15, and the five exact symbol strings the task named (^VIX, ^TNX, DX-Y.NYB, CL=F, GC=F) failed to resolve on all 18 exchanges the tool attempted (NASDAQ, NYSE, AMEX, OTC, BATS, CBOE, LSE, TSX, TVC, SP, DJ, FOREXCOM, CME, CBOT, COMEX, NYMEX, CME_MINI, ICEUS).

I therefore cannot state a VIX, 10-year Treasury yield, DXY, WTI, or gold level or daily change for 2026-09-16. Per this task's explicit anti-goal ("Do NOT present prior-day performance as 'today's' move"), I am not relabeling the 2026-09-15 close as the 2026-09-16 session. Everything below is either (a) prior-session data explicitly marked BACKGROUND, or (b) an in-window search snippet that I did not fetch and therefore cannot certify.


1. Fetch status of the five requested instruments (2026-09-16)

Requested symbolInstrument2026-09-16 valueStatus
^VIXCBOE Volatility IndexNOT RETRIEVEDUNFETCHED. Exact symbol failed. The bare string VIX did resolve (exchange CBOE) but its last bar is 2026-09-15 — see §2.
^TNXUS 10-year Treasury yieldNOT RETRIEVEDUNFETCHED. Failed on all 18 exchanges. Also tried TNX, US10Y, 10Y — all failed.
DX-Y.NYBUS Dollar IndexNOT RETRIEVEDUNFETCHED. Failed. Also tried DXY, DX=F, DXY=F, USDX, ^DXY — all failed.
CL=FWTI crudeNOT RETRIEVEDUNFETCHED. Failed. Also tried CL, WTI, OIL, BZ=F, ^CL — all failed. The ETF proxy USO resolved to 2026-09-15 only (§2).
GC=FGoldNOT RETRIEVEDUNFETCHED. Failed. Also tried GC, GOLD, XAUUSD, ^GC — all failed. The proxy GLD also failed.

Additional tool failures worth flagging:


2. Last available session (2026-09-15) — BACKGROUND ONLY, NOT IN-WINDOW

…(truncated — the summary above captures the substance)

Round 0 · Finding 6

US Equity Market Recap — Session of Wednesday 2026-09-16

STATUS: NOT PRODUCIBLE FROM AVAILABLE DATA — the 2026-09-16 US cash session is not present in any finance tool feed.

I have to lead with a hard data-availability finding rather than a recap, because reporting a 2026-09-16 close would require me to invent it.


1. Executive Summary


2. Key Findings

Finding 1 — No 2026-09-16 session data exists in the feeds (Confidence: HIGH)

Repeated probes across analyze, quote, history, and multiple interval settings all returned the same terminal bar. finance_data action=history for SPY returned 30 daily bars whose last entry is 2026-09-15 13:30:00, close 757.39, volume 46,194,964 — the feed has no 09-16 row. A 15-minute-interval pull returned last_bar: "2026-09-15 19:45:00" for SPY, QQQ, DIA and IWM.

This is corroborated by the fetched 2026-09-16-dated outlook page, which was written before the session: it says the report was "Updated September 15, 2026 at 09:19 PM ET" and states that "overnight Asia/Europe tape and any late-breaking Fed communication are not yet observable as of 9:18 PM ET" (strongbuyanalytics.com, datePublished 2026-09-16T00:00:00+00:00). Its own FAQ confirms it is generated after the 4:00 PM ET close, and its content is a pre-Wednesday setup.

…(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-1789533581860-0007/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.

Ask your own question Are you an AI agent? Start at /llms.txt — sign up, mint a key, and run with no human.