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:

• finance_data action=analyze — LIVE price, % returns, 52-week range position, and the indicator panel (RSI-14, MACD, SMA 50/200, VWMA-20/67, trend). Batch multiple tickers in one call.
• finance_data action=fundamentals — market cap, P/E & forward P/E, PEG, margins, revenue growth, analyst target & rating (use for valuation).
• finance_data action=quote source=pyth — fastest realtime spot price (esp. crypto) with a confidence band, when you need the very latest tick.
• finance_data action=liquidation — the VWMA-67 'true price' and leverage liquidation levels (great for crypto/timing context).
• finance_news — recent catalysts/sentiment (macro + per-ticker headlines).
• finance_insider — corporate insider (SEC Form 4) and, with scope=congress, political trades, to see informed-money flow. If scope=congress returns a browser_fallback (the free API was gated), follow it: use the browser tool on the given capitoltrades.com URL(s) and read the rendered trades table.

3. 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: 2026-08-31T04:37:50.436471275+00:00

Coverage window: 2026-08-31 – 2026-08-31

Rounds: 1

Status: COMPLETE

Evidence: 64 claims · 40 sourced · 1 partial · 2 unsupported · 20 self-reported (no independent source) · 16 single-source

Executive Summary

As of 2026-08-31, there is no verified closing tape for today's session in any pulled data — but the in-window evidence documents a clearly risk-off, tech-led down-open driven by two catalysts: (1) the U.S. struck Iran publicly for the first time in a month, popping oil prices, and (2) hawkish Fed Chair Kevin Warsh comments kept a September rate hike "firmly on the table," hitting tech/AI/semis hardest. The quantitative feed's most recent bar for every index ETF queried is Friday 2026-08-28, not Monday 08-31, so today's actual closing levels, 1-day percentage moves, biggest gainers/losers, and VIX/10-yr yield response could not be verified from any dated in-window source — and none are invented in this report. What follows is (a) the dated in-window picture of what was driving today's session, and (b) the last verified market data (Friday's close), clearly labeled as background.

In-Window Picture — What Was Driving the 2026-08-31 Session

All signals below are dated 2026-08-30/31 and describe the pre-open / overnight tape, not the verified close:

Bottom-line directional read: on the available in-window evidence, today opened as a defensive, oil-driven, tech-led down session — energy supported, rate-sensitive/semis pressured — with the Iran strike and Warsh's rate-hike repricing as the two named drivers. Whether that bias held into the close is unverified: no dated in-window source was found for today's closing levels.

Last Verified Market Data (Friday 2026-08-28 close — background, NOT 08-31)

The feed's most recent ingested bar for every ticker is 2026-08-28 13:30. Treat all of these as the baseline today's session traded against:

Index-level corroboration for the prior session: S&P 500 closed 7,711.76 on 08-28 (30rates.com, matching SPY-implied ~7,711); Dow closed 53,559.99 on 08-28 (CNBC). Prior-close baselines into today: 10-yr yield 4.72%, VIX 14.42 (StrongBuyAnalytics briefing). P/E multiples for the index ETFs were not retrievable in-window (marked "n/f").

Biggest movers: no dated in-window source was found for 08-31 gainers/losers. The only large-move figures in the pulled data are prior-session (08-28) and background only: Marvell (MRVL) −10.28% on Google custom-silicon revenue pushed to FY2029, NVIDIA (NVDA) −4.57% on a free-cash-flow/margin test, PG&E (PCG) −7.52% after California lawmakers blocked the wildfire-liability proposal (ts2.tech). The Marvell/NVIDIA semis weakness is directly relevant context — the 08-31 futures decline was extending exactly that tape.

Analysis

The gap is real, not a research failure. The feed's last bar is Friday 08-28 for every instrument queried (indices, sectors, VIX, TLT), the one in-window recap page claiming 08-31 data renders its figures client-side with no extractable numbers, and the in-window market commentary located is a Sunday-evening pre-market briefing, not a post-close report. Per the freshness rule, a closing claim requires a source dated inside the window — none exists in the pulled material, so the honest answer to "how did the market perform today" is unverified at the close level, with a well-documented down-open.

What the in-window evidence does establish. Two named drivers, both dated to the window: the U.S.–Iran strike (oil up, energy supported, broad risk-off) and Warsh's hawkish Jackson Hole stance (rate-hike repricing, tech/semis hit hardest). The cross-checks are consistent: Nasdaq-100 futures (−0.5%) led the futures complex lower, Asia's chip-heavy Kospi fell twice as much as the regional gauge, and the prior session already had NVDA down 4.57% and SMH −3.47% (StrongBuyAnalytics). The persistence signal from the last verified bar is that small caps (IWM) were already the lone downtrend of the four index proxies (RSI 45.3) — consistent with a risk-off extension going into today.

Ranking of the four proxies by the strength of the available picture: SPY (best-corroborated baseline, index-level confirmed) > QQQ (clearest in-window directional signal: semis/futures) > DIA (defensive relative performer per pre-market futures) > IWM (weakest setup; already in downtrend pre-session). All four are flagged: no 08-31 close fetched.

Risks & Open Questions

• The close may diverge from the pre-open bias. A gap-open lower that faded (late rally) or widened (risk-off acceleration) are both possible; neither is verified. Re-run finance_data once the feed ingests the 08-31 bar for SPY/QQQ/DIA/IWM to obtain the true closes and 1d% moves.
• Today's mover list and sector leaders/laggards are unverified for 08-31 — the MRVL/NVDA/PCG moves cited above are 08-28-dated, not today's.
• Next-session catalysts to watch: the jobs data and AVGO/Dell/HPE earnings flagged in the 08-31-window headline; also, 08-31 is the stated legislative deadline for a revised PG&E wildfire-liability compromise (ts2.tech).

Net: the 2026-08-31 session opened decisively risk-off on the Iran oil shock and Warsh's rate-hike repricing, with tech and small caps under the most pressure — but the day's verified closing record does not yet exist in any pullable source, and nothing above should be read as today's close.

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.

• [SELF-REPORTED] As of 2026-08-31, there is no verified closing tape for today's session in any pulled data — but the in-window evidence documents a clearly risk-off, tech-led down-open driven by two catalysts: (1) the U.S. struck Iran publicly for the first time in a month, popping oil prices, and (2) hawkish Fed Chair Kevin Warsh comments kept a September rate hike "firmly on the table," hitting tech/AI/semis hardest.** The quantitative feed's most recent bar for every index ETF queried is Friday 2026-08-28, not Monday 08-31, so today's actual closing levels, 1-day percentage moves, biggest gainers/losers, and VIX/10-yr yield response could not be verified from any dated in-window source — and none are invented in this report. What follows is (a) the dated in-window picture of what was driving today's session, and (b) the last verified market data (Friday's close), clearly labeled as background.
• [UNSUPPORTED] 1d%
• [UNSUPPORTED] 5d%
• [SELF-REPORTED] +0.47
• [SELF-REPORTED] +2.99
• [SELF-REPORTED] 716.43
• [SELF-REPORTED] −0.65
• [SELF-REPORTED] +0.42
• [SELF-REPORTED] +4.13
• [SELF-REPORTED] 51.9
• [SELF-REPORTED] 535.06
• [SELF-REPORTED] −0.03
• [SELF-REPORTED] +2.05
• [SELF-REPORTED] 55.3
• [SELF-REPORTED] 295.75
• [SELF-REPORTED] +1.56
• [SELF-REPORTED] 45.3
• [PARTIAL] Index-level corroboration for the prior session: S&P 500 closed 7,711.76 on 08-28 (30rates.com, matching SPY-implied ~7,711); Dow closed 53,559.99 on 08-28 (CNBC). (unmatched: 7711)
• [SELF-REPORTED] The gap is real, not a research failure.** The feed's last bar is Friday 08-28 for every instrument queried (indices, sectors, VIX, TLT), the one in-window recap page claiming 08-31 data renders its figures client-side with no extractable numbers, and the in-window market commentary located is a Sunday-evening pre-market briefing, not a post-close report.
• [SELF-REPORTED] Per the freshness rule, a closing claim requires a source dated inside the window — none exists in the pulled material, so the honest answer to "how did the market perform today" is unverified at the close level, with a well-documented down-open.
• [SELF-REPORTED] The persistence signal from the last verified bar is that small caps (IWM) were already the lone downtrend of the four index proxies (RSI 45.3) — consistent with a risk-off extension going into today.
• [SELF-REPORTED] All four are flagged: no 08-31 close fetched.
• [SELF-REPORTED] Re-run finance_data once the feed ingests the 08-31 bar for SPY/QQQ/DIA/IWM to obtain the true closes and 1d% moves.

Detailed Findings

Round 0 · Finding 1

FINAL ANSWER:

US Stock Market Performance — Monday, 2026-08-31

Executive Summary

I was unable to obtain verified Monday 2026-08-31 closing levels for the major US equity indices from data I actually pulled. This is a genuine data-availability gap, not a research omission, and it is important to surface it plainly rather than fill it from memory:

• The finance_data tool lags one trading day: for SPY, QQQ, DIA and IWM, the most recent daily bar across both action=analyze and action=history is 2026-08-28 (Friday), not 2026-08-31 (Monday). The prices and 1d% changes the tool returns are therefore Friday's session, not Monday's.
• The single in-window page found via web search dated for 2026-08-31 (vittarthi.com "US Stock Market Today Aug 31, 2026") loads its index/level, top-mover, and sector tables via JavaScript, and the HTTP-fetched HTML I pulled contains those sections empty (only the page chrome, FAQ, and a "Generated: 31 Aug 2026" stamp rendered). I could not extract the Monday numbers from it.

Because of this, I will present (a) what the pullable data actually shows, clearly labeled with its true date, and (b) an explicit statement of what is missing. No Monday-08-31 closing level, daily %, intraday range, or mover figure below should be treated as verified.

Key Findings

1. Data-tool lag confirmed — the "latest" bars are Friday 2026-08-28. Every finance_data call I made returned a final bar timestamped 2026-08-28 13:30:00. The tool has not ingested the 08-31 session. Flagging this is the central caveat for the entire report.

2. Friday's session (2026-08-28) values, from finance_data — BACKGROUND ONLY, not 08-31. The following are the Friday closing prices and metrics returned by the tool and reflect the session of 2026-08-28:

*These are the stored close for the last ingested bar (2026-08-28), retrieved via finance_data action=analyze (SPY/QQQ/DIA/IWM). They are NOT Monday's closes.

3. Partial prior-session corroboration (CNBC recaps from Aug 26 and Aug 28). In-window web results surfaced CNBC market recaps published Aug 26, 2026 and Aug 28, 2026 (both before the 08-31 window, so background only): S&P 500 ≈ 7,675.70 and Nasdaq Composite ≈ 26,130.20 on Aug 26, and the Dow ending at 53,559.99 on Aug 28. These help calibrate the level regime (S&P ~7,600–7,680; Dow ~53,500) but are not Monday's results.

Data Gaps (explicit)

…(truncated — the summary above captures the substance)

Round 0 · Finding 2

US Stock Market — Session of Monday, 2026-08-31

Executive Summary

This was a time-sensitive, in-window research task, and my tools had partial availability for the 2026-08-31 session. I must be explicit up front: the finance_data tool's equity feed does not yet contain the 2026-08-31 trading session. Every analyze/history call I made for SPY, QQQ, DIA, IWM returned last_bar: "2026-08-28" (Friday's close) — no Monday 2026-08-31 bar exists in the feed. The realtime quote source=pyth endpoint returned HTTP 401 / Unauthorized, so no live spot ticks were retrievable. Accordingly, I cannot report actual 2026-08-31 close levels, 1-day index % changes, big-mover tickers with verifiable percentages, or VIX/10-yr-yield/breadth figures for the session from my data tools — doing so would require inventing numbers, which is prohibited.

What the tools DID provide is a clear, dated pre-market picture of the 2026-08-31 session: a geopolitical oil-shock open dominated by a U.S. strike on Iran. The catalysts below are all in-window (published 2026-08-30 22:13Z through 2026-08-31 03:10Z UTC), and they define how the session was expected to open.

Key Findings (with confidence levels)

1. Catalyst — U.S. strikes Iran, first public strike in a month (2026-08-31 premarket). The most direct in-window driver: "Dow Jones Futures Fall, Oil Prices Pop As U.S. Strikes Iran" (Yahoo Finance, published 2026-08-31T03:10:53Z). Summary: "Dow Jones futures fell slightly while oil prices bounced as the U.S. struck Iran publicly for the first time in a month." Confidence: High (dated headline in window, corroborated by additional sources).

2. Catalyst — Oil/energy shock narrative (2026-08-31 window). Bloomberg ("Latest Oil Market News and Analysis for Aug. 31"): "Oil gained as fresh fighting flared up in the Middle East, and the US signaled increased economic pressure against Iran's trading partners." Multiple background sources corroborate that the 2026 U.S.–Iran conflict's oil shock is the recurring macro undercurrent (Morgan Stanley: "Iran War Oil Shock: Stock Market Impacts"). Confidence: High for the in-window Bloomberg item; the framing pieces are background.

3. Catalyst — Jobs data + tech-earnings week ahead (2026-08-30/31). "Stock Futures Drift Lower, Oil Rises Ahead of Jobs Data, Tech Earnings," published 2026-08-30T22:13:00Z. This week features earnings from Broadcom (AVGO, Nvidia rival), Dell, and Hewlett Packard Enterprise — so futures drifted into a data/earnings-heavy week. Confidence: High (dated in window).

Detailed Analysis

…(truncated — the summary above captures the substance)

Round 0 · Finding 3

US Stock Market Performance — Monday, 2026-08-31

⚠️ Critical data-availability caveat (must-read)

My quantitative market-data tool (finance_data) returns daily bars only through Friday, 2026-08-28 13:30 ET. There is no bar for the requested session date 2026-08-31 (Monday) in the data I pulled for any index or ticker. Pulling action=analyze, action=quote, and action=history for SPY, QQQ, DIA, and IWM all produced a last_bar of 2026-08-28. Consequently, I cannot verify actual 2026-08-31 closing levels, 1d% changes, or per-ticker percentage moves for any asset from the finance tools.

What I can report with confidence:

• SPY (last available bar 08-28): 769.35, −0.23% (1d), +0.47% (5d), +2.99% (20d), RSI-14 ≈ 56.6, range position 93.3%, strong uptrend. This is the 08-28 close, NOT 08-31.
• QQQ (last available bar 08-28): 716.43, −0.65% (1d), RSI ≈ 51.9, strong uptrend.
• DIA (last available bar 08-28): 535.06, −0.03% (1d), RSI ≈ 55.3, strong uptrend.
• IWM (last available bar 08-28): 295.75, −1.35% (1d), RSI ≈ 45.3, downtrend (small caps underperforming).
• SPY daily OHLC history confirms the most recent complete session in my data is 2026-08-28 (open 771.76, high 775.30, low 768.31, close 769.35), consistent with the CNBC Aug 28 wrap that the S&P finished lower on Friday while still posting a winning week.

I will not invent any 2026-08-31 index close or percentage. None of the numeric claims below for the session date are sourced from actual 08-31 market data — they are flagged accordingly.

1. What actually happened on 2026-08-31 (in-window source)

The only in-window news source I could fetch that describes the Aug 31 session is Bloomberg's Markets Wrap titled "Stock Market Today: Dow, S&P Live Updates for August 31" by Anand Krishnamoorthy, published 2026-08-30 22:13 UTC, updated 2026-08-31 04:01 UTC (https://www.bloomberg.com/news/articles/2026-08-30/stock-market-today-dow-s-p-live-updates).

Key points confirmed by that article (dated 2026-08-31):

• Overnight into the Aug 31 session: MSCI Asia Pacific equities gauge dropped 0.8%, snapping a four-day advance, with technology shares leading losses. The Kospi slid 1.6%, dragged by chipmakers Samsung Electronics and SK Hynix — "the biggest drags." Nasdaq 100 futures fell 0.5%.
• Primary driver of the down-open bias: "hawkish comments from Chair Kevin Warsh boosted bets on a Federal Reserve interest-rate hike next month" — i.e., renewed September rate-hike fears from the Fed Chair's Jackson Hole address, which hit tech/AI-sensitive names hardest (Nasdaq 100 futures −0.5% was the worst of the futures complex).
• Secondary driver: "Oil rose as Middle East tensions flared" (Iran tensions) — supporting energy but adding to risk-off.

…(truncated — the summary above captures the substance)

Round 0 · Finding 4

US Stock Market Performance — Session of Monday, 2026-08-31

Critical data-availability caveat (read first)

I was unable to obtain verified closing data, top-loser lists, or same-day catalysts for the 2026-08-31 session. This is not a matter of interpretation — it is a hard technical constraint:

• The finance_data tool's daily series for every index/ticker I pulled terminates at its final bar of 2026-08-28 13:30 (the prior Friday). All four major proxies (SPY, QQQ, DIA, IWM), VIX, and TLT return last_bar: 2026-08-28 13:30 — the tool simply does not contain the 2026-08-31 bar. So no per-ticker 1d% change, close, RSI, or P/E for 2026-08-31 could be pulled.
• The finance_news tool returned HTTP 429 "Too Many Requests" on every attempt (both unscoped and scoped to "stocks"/"earnings"), so I have **no published 2026-08-31 headlines from the finance tools to cite as catalysts.
• The one in-window source that purports to carry the 8/31 closing tape, vittarthi.com ("US Stock Market Today Aug 31, 2026"), returned only a browser-rendered empty body — I could not extract its content.
• I must therefore explicitly flag: no index closing level, no gainer/loser list, and no same-day catalyst claim below is asserted as the verified 2026-08-31 record. Where I cite a closing value, it is the previous session (Friday 2026-08-28) or the ETF data through 8/28, labeled as such.

Per the mission's anti-goal — never fill gaps from memory or invent metrics — I will not fabricate the 8/31 closing tape.

1. What the finance tools do show: Friday 2026-08-28 (through latest available bar)

These are the last available daily bars in the tools (dated 2026-08-28 13:30) — background context for where the 8/31 session started, NOT the requested session.

Notable divergences as of 8/28 (background only): small caps (IWM) were, at the last available bar, the laggard — the only "downtrend" of the batch (RSI 45.3, down 1.35% 1d and 1.40% 5d) — while VIX sat at an extreme low range position (4.8% of its 52-week range, RSI 42.97, close 14.43). This is the pre-session backdrop; it is not a statement about 8/31.

2. In-window (2026-08-31) source located but unextractable

…(truncated — the summary above captures the substance)

Round 0 · Finding 5

US Stock Market Performance — Session of 2026-08-31

⚠️ Critical data caveat (read first)

The finance_data feed available to me has a last_bar of 2026-08-28 13:30 UTC for every symbol I queried (SPY, QQQ, DIA, IWM, XLK, XLF, XLE, XLV, XLY, XLP, XLU, XLB, XLI, XLRE, XLC, VXX, BIL, TLT, GLD). That means the tool's 1d% change figures describe the Friday 2026-08-28 close, not the requested Monday 2026-08-31 session. I verified this by cross-matching SPY's OHLCV rows: 8/27 close 771.10 → 8/28 close 769.35 = −0.23%, which exactly matches the feed's change_pct_1 of −0.227%.

The 2026-08-31 session's price levels, 1d% changes, and close-for-close figures were NOT available from my quantitative feed at the time of this report. The sector indicators below (20d%, RSI, trend) characterize the market's posture into the 08-31 session (as of the 08-28 close) and are presented as pre-session context, not 08-31 results. Two independent web sources I fetched (Vittarthi "US Stock Market Today Aug 31, 2026" and PreMarketPrice "August 31, 2026") carry the 08-31 date but returned no populated numeric data for the session (PreMarketPrice shows "No data available yet" for 08-31; its populated history stops at 08-28; Vittarthi's figure boxes did not render concrete numbers). I did not observe a source publishing actual 08-31 closing figures for the indices or sector ETFs, so I cannot report verified closing levels/1d% for that date. Everything below that is labeled in-window is based on sources published/updated on 2026-08-30/31; everything quantitative is 08-28 last-close context.

1. Sector ETF snapshot — S&P 500 sectors (last completed bar = 2026-08-28 close; pre-session context for 08-31)

Data via finance_data action=analyze, interval 1d, all with last_bar = 2026-08-28 13:30. "1d%" here is the 08-28 session change; it is not the 08-31 change (feed had not ticked to 08-31).

…(truncated — the summary above captures the substance)

Round 0 · Finding 6

US Stock Market — Monday, 2026-08-31

Critical data-integrity caveat (read first)

This is a Monday session immediately following a weekend (market closed Sunday, Aug 30). Every figure I could pull from the finance tools (finance_data action=analyze) carries a last_bar of 2026-08-28 — i.e., the snapshot reflects the prior trading session (Friday, Aug 28) close, not the Monday, Aug 31 close. I was unable to retrieve a verifiable post-session 2026-08-31 closing tape from an in-window source: the one page that claims to carry it, https://vittarthi.com/markets/us, is a template whose embedded numeric tags did not render the actual closing figures in my fetch; and the closest market commentary source I could fetch in-window, https://strongbuyanalytics.com/stock-market-outlook, is explicitly dated "Updated August 30, 2026 at 06:05 PM ET" — a Sunday-evening pre-market briefing for Monday, so its levels are also the prior close, not the session.

I therefore cannot cite, from a fetched in-window source, the actual 2026-08-31 closing levels or percentage moves of the S&P 500, Nasdaq, Dow, or Russell 2000. What follows is: (a) the verified prior-session (Aug 28) baseline from the finance tools, (b) the confirmed Monday calendar of catalysts from the strongbuyanalytics briefing (which is the pre-market description of that day), and (c) explicit flags where the event-day tape itself is unverified. Do not read any "close" figure below as the Aug 31 close — none of them is.

1. Executive summary

On Monday, 2026-08-31, the US equity market was due to open after a closed weekend (Saturday Aug 29 + Sunday Aug 30; market closed Sunday per https://investomatica.com/is-stock-market-open, which also confirmed "Tomorrow, Monday, August 31, 2026, the US stock market will be open"). The only confirmed US macro catalyst on the Monday calendar was the Dallas Fed Manufacturing Index at 2:30 PM ET, joined by 3-month and 6-month Treasury bill auctions at 3:30 PM ET (1. https://strongbuyanalytics.com/stock-market-outlook).

Because I verified no in-window post-session tape, I cannot state that the market actually closed up or down on Aug 31 from a fetched source. I verified only that the market was open and that the pre-market setup described the day as a "selective risk-off / rotation" posture with futures softer (S&P futures −0.26%, Nasdaq −0.69%, Dow −0.07%, Russell −1.37% as of the Aug 30 briefing), with semis and small caps under the most pressure (ibid.). All of that description predates the session and is a pre-market outlook, not a result.

2. Verified prior-session baseline for what drove the Aug 31 setup

The following are the Aug 28 close values from finance_data (last_bar 2026-08-28). I present them only as the baseline the Monday session was trading against, not as Monday's result:

…(truncated — the summary above captures the substance)

Investigation Trail

Round 0

• What were the closing values, daily percentage changes, and intraday ranges of the S&P 500 (SPX), Nasdaq Composite (IXIC), Dow Jones Industrial Average, and Russell 2000 on Monday 2026-08-31 (session of 2026-08-31..2026-08-31)? Pull finance_data action=analyze for the index ETFs SPY, QQQ, DIA, and IWM to capture live price, 1d%, 5d%, 20d%, RSI-14, and trend, and cross-check with finance_news headlines dated 2026-08-31 for official closing recaps.
• Which US stocks were the biggest top-percentage gainers on 2026-08-31 (session date 2026-08-31..2026-08-31), and what company-specific catalysts announced on 2026-08-31 — earnings, guidance raises, mergers, FDA/regulatory wins, analyst upgrades, or index inclusions — drove each move? Identify candidate tickers via web/finance search, then pull finance_data action=analyze and action=fundamentals for each, and confirm catalysts via finance_news articles dated 2026-08-31.
• Which US stocks were the biggest top-percentage losers on 2026-08-31 (session date 2026-08-31..2026-08-31), and what catalysts reported on 2026-08-31 — earnings misses, guidance cuts, downgrades, regulatory/legal news, or sector-wide selloffs — drove the declines? Identify candidate tickers via search/finance_news, then pull finance_data action=analyze and action=fundamentals for each ticker and cite the specific 2026-08-31 headlines.
• Which US macroeconomic data releases, Federal Reserve speeches/events, Treasury auctions, or geopolitical news occurring on 2026-08-31..2026-08-31 were cited by market commentary as the main drivers of the session's equity moves, and how did the 10-year Treasury yield and the VIX (^VIX) behave on 2026-08-31 in response? Use finance_news for the day's calendar and headlines; use finance_data action=quote or action=analyze for yield/volatility proxies (e.g., TLT, VIXY or ^VIX) and note the direction of the reaction.
• How did the 11 S&P 500 sectors perform on 2026-08-31 (session date 2026-08-31..2026-08-31), measured via finance_data action=analyze on sector ETFs XLK, XLF, XLE, XLV, XLY, XLP, XLU, XLB, XLI, XLRE, and XLC — and did the session show a growth-vs-value or cyclical-vs-defensive rotation? Report each ETF's 1d%, 20d%, RSI, and trend, and note which sectors led and lagged.
• What did pre-market and intraday US equity futures, the VIX, the 10-year Treasury yield, and market breadth (advancers/decliners, new highs/lows) show during the 2026-08-31..2026-08-31 session, and did early signals hold or reverse at the close? Pull futures/context data via finance_news and finance_data (e.g., quote source=pyth for fast real-time context on SPY/QQQ, and analyze on ^VIX proxies), citing only 2026-08-31 timestamps.

Sources

• https://vittarthi.com/markets/us
• https://www.cnbc.com/2026/08/25/stock-market-today-live-updates.html
• https://www.cnbc.com/2026/08/27/stock-market-today-live-updates.html
• https://www.investopedia.com/stock-market-today-dow-jones-s-and-p-500-08252026-12067123
• https://finance.yahoo.com/markets/live/stock-market-today-wednesday-august-26-dow-sp-500-nasdaq-081834782.html
• https://stockmarkethours.org/stock-market-holidays-2026
• https://strongbuyanalytics.com/stock-market-outlook
• https://www.nyse.com/publicdocs/nyse/ICE_NYSE_2026_Yearly_Trading_Calendar.pdf
• https://the-calendar.net/finance/stock-market-holidays-2026/
• https://holidayclosures.com/stock-market/
• https://arcanemonitor.com/market-calendar/2026-08
• https://thestreetbrief.com/resources/stock-market-holidays
• https://publicholidayshub.com/stock-market-holidays/
• https://fred.stlouisfed.org/series/SP500
• https://countryeconomy.com/stock-exchange/usa?dr=2026-08
• https://wealthvieu.com/investing/stocks/stock-market-holidays/
• https://finance.yahoo.com/m/5851be5e-4456-36df-acc2-e391c82c51f8/dow-jones-futures-fall%2C-oil.html
• https://finance.yahoo.com/m/f2abac1b-c525-31ba-9e2e-f1bf9ebaa4ae/stock-futures-drift-lower%2C.html
• https://www.bloomberg.com/news/articles/2026-08-30/latest-oil-market-news-and-analysis-for-aug-31
• https://www.morganstanley.com/insights/articles/iran-war-oil-shock-stock-market-impacts
• https://www.wsj.com/livecoverage/stock-market-today-dow-sp-500-nasdaq-08-24-2026
• https://www.intellectia.ai/blog/rising-oil-prices-stock-market-impact-august-2026
• https://www.thewallstreetschool.com/blog/iran-war-affect-stock-market-in-2026/
• https://tradingstrategyguides.com/stock-market-preview-august-18-2026-iran-tensions-hit-futures/
• https://www.iea.org/reports/oil-market-report-august-2026
• https://intellectia.ai/blog/us-iran-ceasefire-oil-prices-stock-market-impact-2026
• https://www.stockcram.com/blog/us-iran-tensions-stock-market-2026
• https://www.bloomberg.com/news/articles/2026-08-30/stock-market-today-dow-s-p-live-updates
• https://finance.yahoo.com/economy/policy/articles/warsh-jackson-hole-8-key-210412150.html
• https://finance.yahoo.com/markets/article/wall-streets-summer-calm-is-colliding-with-the-years-most-volatile-stretch-chart-of-the-day-114901053.html
• https://equityclock.com/2026/08/28/stock-market-outlook-for-august-31-2026/
• https://stockmarketwatch.com/indices/dowjones/reports/july-2026
• https://stockmarketwatch.com/indices/sp500/today
• https://30rates.com/sp500
• https://www.tradingkey.com/tools/market-update/us-stock-market-this-week-20260831
• https://ts2.tech/en/category/stock-market/
• https://financhle.com/earnings-calendar
• https://www.cnbc.com/2026/08/23/stock-market-today-live-updates.html
• https://www.investopedia.com/stock-market-today-dow-jones-s-and-p-500-08242026-12066087
• https://dowjonestoday.net/
• https://vestedfinance.com/us-market-holidays/
• https://premarketprice.com/premarket-movers
• https://fred.stlouisfed.org/series/DJIA/
• https://www.stockbase.com/market-data/sectors
• https://algolabhk.com/en/blogs/august-sector-focus
• https://investomatica.com/is-stock-market-open
• https://www.aistockselection.com/en/us-stock-market-holidays-2026/
• https://finance.yahoo.com/quote/^SPX/history/
• https://www.statmuse.com/money/ask/s-and-p-500-close-by-day-in-august-2026
• https://www.probly.com/en/event/spx-up-or-down-on-august-31-2026
• https://web3.bitget.com/predictions/event/spx-up-or-down-on-august-31-2026
• https://finance.yahoo.com/markets/stocks/articles/dow-outperforming-p-500-nasdaq-095000218.html
• https://eskisignal.com/stock-market-holidays-2026/
• https://stockmarketwatch.com/indices/dowjones/today
• https://theclosereport.com/

Trace Index

Tool-call traces are persisted under /srv/swarm_web_runs/run-1788150701401-0010/finance_output/traces.