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: 2026-08-29T04:45:35.746169140+00:00

Coverage window: 2026-08-29 – 2026-08-29

Rounds: 1

Status: COMPLETE

Evidence: 70 claims · 24 sourced · 11 partial · 8 unsupported · 26 self-reported (no independent source) · 8 single-source

Executive Summary

As of 2026-08-29 — a Saturday — the US stock market did not trade today. The NYSE and Nasdaq were closed (https://investomatica.com/is-stock-market-open), and every market-data pull returns its last daily bar on 2026-08-28 (Friday) with no 8/29 bar for any symbol. There is therefore no 8/29 session close, no mover list, and no 8/29 catalyst; the operative "how did the market do today" answer is the last completed session, Friday 2026-08-28, which closed modestly lower across the board.

Friday 8/28 in one line: risk-off but not a rout — S&P 500 −0.25% to 7,711.76, Nasdaq Composite −0.52% to 26,402.42, Dow −0.02% to 53,559.99, small caps the clear laggard (Russell 2000 proxy −1.35%) — driven by a hawkish Fed repricing after Chair Kevin Warsh's Jackson Hole speech (September rate-hike odds jumped to 57.5% from 35.4%, per CME FedWatch) and a broadening AI/semiconductor/data-center selloff (Marvell −10%+, Nvidia −4.6%, Applied Digital −7%, IREN −13%) even as Amazon rose ~4% on an AWS chip-deal rotation. All three large-cap indices still finished the week positive: S&P +0.5%, Nasdaq +0.9%, Dow +0.5% — the Dow's first winning week in three (https://www.cnbc.com/2026/08/27/stock-market-today-live-updates.html).

Last Completed Session — Friday, 2026-08-28 (the "as-of" snapshot for 2026-08-29)

Major indices

Index point levels are CNBC-reported (CNBC link above); ETF prices/moves are pulled from finance_data (last bar 2026-08-28 13:30). RSI-14 varies with lookback window — an alternate pull showed SPY 65.9 / QQQ 64.0 / DIA 63.3 / IWM 56.4; both reads show momentum cooling, with MACD histograms negative across all four. Small caps are the diverging asset: IWM closed below its SMA-20 with a "downtrend" label, while the large-cap proxies sit above their SMA-50/200 with SPY at the 93.3% position of its 52-week range.

Biggest movers of the 8/28 session (none exist for 8/29)

Analysis

What drove Friday's tape (and therefore the state of the market as of today):

1. Fed/rates — the primary driver. Warsh at Jackson Hole said "this summer's PCE and CPI readings… do not tell me that underlying trends have meaningfully improved," and CME FedWatch repriced a September rate hike to 57.5% odds, up from 35.4% a day earlier. The 10-year (TNX) closed at 4.721, +1.03%, at the 96.8% position of its 52-week range. This explains the sector rotation cleanly: rate-sensitive, long-duration groups sold off — Tech (XLK) −1.55% (worst sector), Utilities (XLU) −1.04%, Real Estate (XLRE) −0.40% — while higher-rate beneficiaries gained: Communication Services (XLC) +1.42%, Consumer Discretionary (XLY) +1.15%, Energy (XLE) +0.63%, Financials (XLF) +0.38%. This was a hawkish-Fed dispersion day, not a flight-to-defensives day.

2. AI/semiconductor rotation. Amazon +3.97% on its AWS GPU deal versus Nvidia −4.58% is a within-megacap profit rotation; IREN −13%, APLD −7%, and the optics slide show the data-center trade unwinding further. JPMorgan is still bullish on semis after the 20%+ correction, arguing "the peak in AI earnings is already priced in" (https://www.financialjuice.com/News/9741024/JPMorgans-Manoukian-on-AI-and-Semiconductors-JPM.aspx).

3. Earnings-driven single names. DKS's record −25% cratered retail sentiment; GPS, MRVL, BNTX/MRNA, and SentinelOne moved on company-specific news all dated 8/28.

Valuation anchor worth carrying into next week: NVDA at $217.55 trades at a forward P/E of 14.2, PEG 0.59, with +105.9% revenue growth and a 58-analyst Strong Buy consensus (mean target $305.79; https://finance.yahoo.com/markets/stocks/articles/jim-cramer-explained-turned-tide-033354732.html). Friday's drop reads as post-earnings profit-taking rather than a fundamental break — it was still +1.3% on the week. Small-cap divergence is the main technical red flag: IWM's downtrend label into the weekend sets up the next week's jobs report as the key test for whether the hawkish repricing sticks.

Risks & Open Questions

• RSI discrepancy: two finance_data pulls returned different RSI-14 values (30-bar vs 250-bar lookback); both agree momentum cooled but large caps stayed in uptrends.
• Russell 2000 index point level: no dated in-window source for the ^RUT close was retrievable; only the IWM ETF proxy (−1.35% to $295.75) is verified.
• Excluded bad data: two "Aug 29" aggregator pages carried implausible or contradictory figures (weeklytrader.io showed Nike at $508.65; tickerdaily.com showed the S&P at 5,847.29 vs CNBC's 7,711.76). These were excluded as unreliable; all figures above come from CNBC's dated 8/28 wrap and live finance_data pulls.
• No in-window (8/29) trading evidence exists because no session occurred; every price and catalyst is labeled to the 8/28 session, per the freshness requirement.

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] There is therefore no 8/29 session close, no mover list, and no 8/29 catalyst; the operative "how did the market do today" answer is the last completed session, Friday 2026-08-28, which closed modestly lower across the board.
• [PARTIAL] Friday 8/28 in one line:** risk-off but not a rout — S&P 500 −0.25% to 7,711.76, Nasdaq Composite −0.52% to 26,402.42, Dow −0.02% to 53,559.99, small caps the clear laggard (Russell 2000 proxy −1.35%) — driven by a hawkish Fed repricing after Chair Kevin Warsh's Jackson Hole speech (September rate-hike odds jumped to 57.5% from 35.4%, per CME FedWatch) and a broadening AI/semiconductor/data-center selloff (Marvell −10%+, Nvidia −4.6%, Applied Digital −7%, IREN −13%) even as Amazon rose ~4% on an AWS chip-deal rotation. (unmatched: 57.5, 35.4, 4.6, 13)
• [UNSUPPORTED] 1d%
• [UNSUPPORTED] 5d%
• [SELF-REPORTED] $769.35
• [SELF-REPORTED] −0.23%
• [SELF-REPORTED] +0.47%
• [SELF-REPORTED] +2.99%
• [SELF-REPORTED] 56.6
• [SELF-REPORTED] $535.06
• [SELF-REPORTED] −0.03%
• [SELF-REPORTED] +0.53%
• [SELF-REPORTED] +2.05%
• [SELF-REPORTED] 55.3
• [SELF-REPORTED] $716.43
• [SELF-REPORTED] −0.65%
• [SELF-REPORTED] +0.42%
• [SELF-REPORTED] +4.13%
• [SELF-REPORTED] 51.9
• [SELF-REPORTED] $295.75
• [SELF-REPORTED] +1.56%
• [SELF-REPORTED] 45.3
• [SELF-REPORTED] RSI-14 varies with lookback window — an alternate pull showed SPY 65.9 / QQQ 64.0 / DIA 63.3 / IWM 56.4; both reads show momentum cooling, with MACD histograms negative across all four.
• [PARTIAL] Small caps are the diverging asset: IWM closed below its SMA-20 with a "downtrend" label, while the large-cap proxies sit above their SMA-50/200 with SPY at the 93.3% position of its 52-week range. (unmatched: 93.3, 52)
• [PARTIAL] Q2 earnings miss; dragged the footwear/retail complex (https://finance.yahoo.com/m/601ba381-af35-348e-93ed-b6fcef529668/) (unmatched: 601, 381, 348, 529668)
• [UNSUPPORTED] −10%+
• [PARTIAL] AI data-center selloff broadened beyond one name (https://247wallst.com/investing/2026/08/28/applied-digital-sinks-7-iren-tumbles-13-as-data-center-selloff-broadens-past-one-name/) (unmatched: 247)
• [PARTIAL] −4.58% to $217.55 (unmatched: 4.58)
• [PARTIAL] Reversal of Thursday's +8.7% post-earnings surge (Stifel raised target to $315; https://finance.yahoo.com/markets/stocks/articles/nvidia-drops-3-3-315-222706659.html); profit rotation into AMZN on the AWS chip deal (unmatched: 222706659)
• [UNSUPPORTED] −7%
• [UNSUPPORTED] −8% / −6%
• [PARTIAL] Failed colorectal-cancer vaccine Phase 2 trial (https://247wallst.com/investing/2026/08/28/biontech-tumbles-8-as-colorectal-cancer-vaccine-trial-fails-moderna-drops-6-pfizer-holds-flat/) (unmatched: 247)
• [UNSUPPORTED] −8%
• [UNSUPPORTED] −4%
• [SELF-REPORTED] +3.97%
• [PARTIAL] Expanded AWS GPU deal (Amazon rose while NVDA fell); Zoox robotaxi launch news (https://247wallst.com/investing/2026/08/28/amazon-jumps-4-on-expanded-aws-chip-deal-why-is-nvidia-falling-4/) (unmatched: 247)
• [SELF-REPORTED] What drove Friday's tape (and therefore the state of the market as of today):**
• [SELF-REPORTED] Fed/rates — the primary driver. Warsh at Jackson Hole said "this summer's PCE and CPI readings… do not tell me that underlying trends have meaningfully improved," and CME FedWatch repriced a September rate hike to 57.5% odds, up from 35.4% a day earlier.
• [SELF-REPORTED] The 10-year (TNX) closed at 4.721, +1.03%, at the 96.8% position of its 52-week range.
• [SELF-REPORTED] This was a hawkish-Fed dispersion day, not a flight-to-defensives day.
• [PARTIAL] AI/semiconductor rotation. Amazon +3.97% on its AWS GPU deal versus Nvidia −4.58% is a within-megacap profit rotation; IREN −13%, APLD −7%, and the optics slide show the data-center trade unwinding further. (unmatched: 3.97, 4.58)
• [PARTIAL] JPMorgan is still bullish on semis after the 20%+ correction, arguing "the peak in AI earnings is already priced in" (https://www.financialjuice.com/News/9741024/JPMorgans-Manoukian-on-AI-and-Semiconductors-JPM.aspx). (unmatched: 9741024)
• [UNSUPPORTED] Small-cap divergence is the main technical red flag: IWM's downtrend label into the weekend sets up the next week's jobs report as the key test for whether the hawkish repricing sticks.
• [PARTIAL] Russell 2000 index point level: no dated in-window source for the ^RUT close was retrievable; only the IWM ETF proxy (−1.35% to $295.75) is verified. (unmatched: 295.75)
• [SELF-REPORTED] No in-window (8/29) trading evidence exists because no session occurred; every price and catalyst is labeled to the 8/28 session, per the freshness requirement.

Detailed Findings

Round 0 · Finding 1

CRITICAL FINDING — 2026-08-29 Is a Weekend (Saturday); No Trading Session Occurred

The requested date 2026-08-29 is a Saturday, so the US equity market did not trade and there are no official closing levels or daily percentage changes for that date available from any market-data source. The premise of the task (that 2026-08-29 is a US trading session) is factually incorrect, and I will not fabricate index figures for a session that never happened.

Verification that 2026-08-29 is a Saturday and the market was closed:

• Investomatica's live market-status page, fetched on 2026-08-29 (New York time 12:30 AM), states verbatim: "No, today, Saturday, August 29, 2026, the US stock market will be closed. Tomorrow, Sunday, August 30, 2026, the US stock market will also be closed." — https://investomatica.com/is-stock-market-open (published/live 2026-08-29)
• Independent calendar references confirm the weekday: "August 29, 2026 is a Saturday" (https://howlongagogo.com/day-of-the-week/august-29-2026; https://www.dayoftheweek.org/?m=August&d=29; https://www.timeanddate.com/date/weekday.html?year=2026&month=8&day=29) — all dated 2026-08-29.
• The market-data feed's last completed daily bar for every major index proxy is timestamped 2026-08-28 13:30 (the Friday, August 28 session), i.e., the most recent close predates the requested date. If 8/29 had been a trading day, the feed would carry an 8/29 bar.

What this means for the requested output: There is no 2026-08-29 session. S&P 500, Dow, Nasdaq Composite, and Russell 2000 have no official 2026-08-29 close, and no "biggest movers" or "catalysts" tied to that date's trading exist. I report below the last completed US session — Friday, 2026-08-28 — clearly labeled as such, because it is all the live, pulled data that exists as of 2026-08-29.

Findings — For the Most Recent Completed Session (Friday, 2026-08-28 close)

All figures below are pulled live from the finance_data tool (daily OHLCV bars; final bar timestamped 2026-08-28 13:30). Index levels are represented by their primary exchange-traded proxies (SPY→S&P 500, DIA→Dow, QQQ→Nasdaq-100; for the Russell 2000, IWM).

…(truncated — the summary above captures the substance)

Round 0 · Finding 2

US Stock Market Performance — 2026-08-29

Critical caveat up front

I was unable to retrieve any 2026-08-29 session trading data from the finance data sources available to me. Every pull of the four major index ETFs returned the same most-recent trading bar: 2026-08-28 13:30:00 (U.S. Eastern = market close on Friday, August 28, 2026). No 2026-08-29 intraday or closing bar exists in the feed (finance_data analyze and quote for SPY, QQQ, DIA, IWM all reported last_bar: 2026-08-28). The Yahoo Finance earnings-calendar page for day=2026-08-29 returned a browser-rendered page with an empty readable body, and the dated market-recap/news pages I located (vittarthi.com, premarketprice.com, arcanemonitor.com) returned empty bodies when fetched.

This is the pattern you get when the requested date is a non-trading day. 2026-08-29 is consistent with a Saturday (the prior CNBC "Stock market news" day in the search results was dated Aug. 21, 2026, i.e., a Friday; counting forward, 2026-08-29 falls on a weekend). I could not confirm the weekday from an in-window dated primary source — this is inference from streak-of-data, not a verified claim — and I urge you to treat the "Saturday/closed" conclusion as verified only in the sense that no 8/29 bar exists in the data feed, not as a confirmed dated fact. There is no evidence in any retrievable source of a 2026-08-29 U.S. equity session.

Per the task's freshness rule, I will not manufacture "what happened on the 2026-08-29 session" from memory or stale training data. Below are the only quantitative figures I could actually pull, all of which describe the 2026-08-28 (Friday) session — the most recent bar available.

This session's data (as pulled — most recent bar = 2026-08-28 close)

Major index ETFs (price / 1-day % / 5-day % / 20-day % / RSI-14 / trend):

Source: finance_data analyze (bars=30) & quote (bars=250), both ending last_bar: 2026-08-28 13:30:00.

…(truncated — the summary above captures the substance)

Round 0 · Finding 3

US Stock Market — What Happened on Friday, August 28, 2026 (the request date, 08-29, was CLOSED)

1. Executive summary — date verification

The request date 2026-08-29 is a Saturday. The US stock market did NOT trade on that day, so there is no "today" close, no index move, and no mover list for 08-29. This is confirmed three independent ways:

1. Primary market-hours tracker (investomatica.com): "No, today, Saturday, August 29, 2026, the US stock market will be closed. Tomorrow, Sunday, August 30, 2026 ... will also be closed." (https://investomatica.com/is-stock-market-open) — fetched live, showing 08-29 closed.
2. Sync the search hit: "Tomorrow, Saturday, August 29, 2026, the US stock market will be closed." (https://investomatica.com/is-stock-market-open)
3. Finance-tool daily bars end at 08-28: Every one of my pulled OHLC series (SPY, QQQ, IWM, DIA) has its last bar at 2026-08-28 13:30 UTC with no bar for 08-29, consistent with a non-trading day.

Therefore, per the freshness/anti-goal rules, I cannot and will not produce index OHLC, percent changes, or mover rankings "as of 2026-08-29" — none exist. Any page claiming "closing data for Aug 29, 2026" (e.g., the auto-generated vittarthi.com/markets/us page, which pegs "29 Aug" as "Today" but generates its market wrap only through the last completed session) is a generator page, not a record of trades on that date.

What I CAN report, grounded in pulled data: the most recent completed US session was Friday, August 28, 2026, and the news/catalyst flow of that week. The sections below report that session, explicitly labeled as the last completed session — not as "08-29."

2. Last completed session — Friday, August 28, 2026 (pulled from finance_data action=history/analyze)

Index-level data pulled directly (per-ticker, last bar 2026-08-28 13:30 UTC):

Key pulled facts for the 08-28 session:

• S&P 500 (SPY): opened 771.76, high 775.30, low 768.31, closed 769.35 (−0.23%). It gave back intraday gains and closed near session lows.
• Nasdaq 100 (QQQ): opened 719.74, high 724.13, low 715.09, closed 716.43 (−0.65%) — the weakest of the three large-cap proxies.
• Russell 2000 (IWM): opened 299.70, high 300.39, low 295.67, closed 295.75 (−1.35%) — small caps lagged sharply, breaking below their SMA-20 — a clear small-cap-lag / tech-led-day-in-progress-to-red profile.
• Dow (DIA): flattest, closed 535.06 (−0.03%).

…(truncated — the summary above captures the substance)

Round 0 · Finding 4

US Equity Sector Rotation — Data as of Friday, August 28, 2026 (most recent completed session before "today," Sat Aug 29, 2026)

Critical data-availability caveat (please read)

2026-08-29 is a Saturday and a market-closed day. Per an auto-refreshed exchange calendar, "today, Friday, August 28, 2026, the US stock market was open. Tomorrow, Saturday, August 29, 2026, the US stock market will be closed" (https://investomatica.com/is-stock-market-open). Every data feed I pulled (finance tools and dated web sources) also places the latest completed session at Friday, August 28, 2026:

• My finance-tool time series returns its final daily bar stamped 2026-08-28 for all equities, sector ETFs, and yields (e.g., XLK ranges contain "last_bar": "2026-08-28 13:30:00").
• Stockbase's sector heat map is labeled "Data as of Aug 29, 2026 (prior close)" (https://www.stockbase.com/market-data/sectors), i.e., its "Aug 29" figures are the prior (Fri 8/28) close.
• CNBC's in-window front-page market story is "Updated Fri, Aug 28 2026, 4:50 PM EDT" — the Friday session close (https://www.cnbc.com/2026/08/27/stock-market-today-live-updates.html).

Therefore all figures below are the Friday, 2026-08-28 close — the correct "as of 2026-08-29" snapshot. No same-day Saturday close exists; I have flagged this rather than inventing one.

1. Index-level result (Friday 8/28/2026 close)

From CNBC (updated Fri Aug 28 2026, 4:50 PM EDT): "The S&P 500 fell 0.25% and closed at 7,711.76, while the Nasdaq Composite slid 0.52% to 26,402.42… The Dow Jones Industrial Average was down 9.45 points, or 0.02%, and ended at 53,559.99." The S&P advanced 0.5% on the week, Nasdaq +0.9%, Dow +0.5% (first winning week in three). (https://www.cnbc.com/2026/08/27/stock-market-today-live-updates.html)

Cross-checked against my finance pull (ticker moves for the same session): SPY −0.23%, QQQ −0.65%, DIA −0.03%, IWM −1.35%. Consistent with the CNBC account (spread due to ETF vs index composition).

2. Sector rotation — who gained vs lost (Friday 8/28/2026)

S&P 500 Select Sector SPDR ETFs, one-day % change, from my finance data (final bar = 2026-08-28 close):

…(truncated — the summary above captures the substance)

Round 0 · Finding 5

US Equity Market — 2026-08-29 Performance & Mega-Cap Catalyst Review

Data window note: This report is built on market data pulled live from the finance tools (last completed daily bar) cross-referenced against articles with explicitly visible dates inside the 2026-08-29 window. Index-specific tickers (^GSPC, ^IXIC, ^DJI, ^RUT) did not resolve in the data feed, so index direction is proxied via the tradeable ETFs SPY, QQQ, DIA, IWM — flagged clearly below.

Executive Summary

Friday 2026-08-29 was a risk-off, tech-led pullback day. Small caps (IWM) led declines, the Nasdaq-heavy QQQ fell more than the S&P proxy, and the single biggest index-level driver was NVIDIA (NVDA), which reversed a day-after-earnings surge and closed ~4.6% lower on the Friday session. The day's tone was set by Nvidia's post-earnings digestion, a hawkish Fed signal (Chair Warsh on inflation raising September rate-hike odds), weak retail/footwear after Dick's Sporting Goods cratered, and geopolitical flashpoints (Iran/Strait of Hormuz, Venezuela oil pact). Within mega-cap tech the tape was split: NVDA and TSLA dragged; AAPL, MSFT, AMZN, GOOGL and META were mixed-to-higher on individual catalysts.

Key Findings (each quantitative claim citeable below)

1. Indices were down, led by Nasdaq & small caps — 2026-08-28 bar (latest available), proxied via ETFs.

• SPY (S&P 500 proxy): down -0.23% to $769.35 (52-wk position 93.3%, near highs)
• QQQ (Nasdaq-100 proxy): down -0.65% to $716.43
• DIA (Dow-30 proxy): down -0.03% to $535.06
• IWM (Russell 2000 proxy): down -1.35% to $295.75 — worst of the four

(Source: finance_data quote for SPY/QQQ/DIA/IWM. Caveat: direct ^GSPC/^IXIC/^DJI index data could not be retrieved; the ETF proxies above are the concrete pulled numbers. Date label on the bar: 2026-08-28 13:30.)

2. NVIDIA was the day's defining mega-cap mover, closing ~4.6% lower on Friday.

• NVDA: $217.55, -4.58% (weekly still +1.3%; 20-day +8.4%; RSI-14 ~52; 52-wk position 73.8%).
• The Cramer piece — published 2026-08-29T03:33Z — states explicitly: "the shares surged in premarket the day after [earnings], on Friday they closed 4.6% lower." This corroborates the pulled -4.58% move as the Fridays-session close.
• This was a reversal: Thursday 08-28 NVDA had surged +8.7% to $220.41 after earnings (per "Nvidia Drops 3.3%" article dated 2026-08-28T22:27Z, which reports that Thursday spike and Stifel's target raise to $315 from $282).

3. NVDA fundamentals make the pullback notable but the valuation is not stretched.

• Trailing P/E 27.5, forward P/E 14.2, PEG 0.59, gross margin 74.7%, revenue growth +105.9%, analyst mean target $305.79 (high $500) vs. price $217.55, rating Strong Buy / 58 analysts.

(Source: finance_data fundamentals NVDA; finance_news NVDA items dated 2026-08-29 and 2026-08-28.)

…(truncated — the summary above captures the substance)

Round 0 · Finding 6

US Stock Market Performance — 2026-08-29

Executive Summary / Critical Finding

There was no US stock market trading session on 2026-08-29. That date is a Saturday, and the NYSE/Nasdaq are closed on weekends.

• Source (primary, dated): Investomatica's market-open calendar page states, "No, today, Saturday, August 29, 2026, the US stock market will be closed. Tomorrow, Sunday, August 30, 2026, the US stock market will also be closed." (https://investomatica.com/is-stock-market-open)

Consequently, there are no closing prices, index moves, or same-day gainers/losers for the 2026-08-29 session because no such session existed. The request's premise (a "2026-08-29 trading session") does not correspond to a traded day.

Two of the search results that carried an "August 29, 2026" label (vittarthi.com and weeklytrader.io) are not valid representations of a session that day:

• weeklytrader.io's "Top Gainers — August 29, 2026" (https://weeklytrader.io/gainers.php) lists what it labels as the last closed session's gainers, but I am flagging this table as unreliable: several prices are implausible for the actual tickers (e.g., Nike at $508.65, General Motors at $272.78, Amazon at $195.61, Coinbase at $149.55, Broadcom +$56.49 / +11.82%). These do not match the real trading levels in the same window and appear to be scraped/corrupted feed data. Do not use these as closing facts.
• vittarthi.com's "US Stock Market Today Aug 29, 2026" (https://vittarthi.com/markets/us) page's wrapped content shows daily tabs but the pages themselves are JavaScript-rendered; no concrete index/professional figures could be extracted from the fetched HTML, and the "29 Aug" tab reflects a non-trading day. It is not usable for a session that did not trade.

Because there is no 2026-08-29 session, the correct in-window data to report is the last completed session: Friday, 2026-08-28. Below I report the request's requested data (indices, biggest movers, catalysts) anchored to that last trading day, with the explicit caveat that the requested date itself was a market holiday (weekend).

Key Findings

1. The requested date (2026-08-29) was a non-trading Saturday (HIGH confidence)

Investomatica's dated calendar page explicitly identifies Aug 29, 2026 as a Saturday on which the market is closed. (https://investomatica.com/is-stock-market-open) This is the primary, on-window fact that governs the whole request.

2. Last trading session — Friday, 2026-08-28 — index closes (MEDIUM-HIGH confidence)

From CNBC's live market blog dated "Updated Fri, Aug 28 2026 4:50 PM EDT," headline "S&P 500 falls Friday after Fed's Warsh highlights inflation worries, but index posts positive week" (https://www.cnbc.com/2026/08/27/stock-market-today-live-updates.html):

…(truncated — the summary above captures the substance)

Investigation Trail

Round 0

• What were the official closing levels and daily percentage changes on 2026-08-29 for the major US indices: S&P 500, Dow Jones Industrial Average, Nasdaq Composite, and Russell 2000? Use market-data sources reporting the 2026-08-29 session close.
• Which individual stocks were the biggest percentage gainers and losers in the S&P 500 and Nasdaq-100 during the 2026-08-29 trading session, and what were their closing prices and % changes? Look for market-data lists published on 2026-08-29.
• What news, events, or data releases dated 2026-08-29 drove the US market's move that day: e.g., Federal Reserve commentary, PCE inflation data, jobless claims, earnings from mega-cap or index-heavy stocks, or geopolitical headlines? Use only articles/announcements dated 2026-08-29.
• How did US equity sectors rotate on 2026-08-29: which S&P 500 sectors gained vs lost the most (e.g., XLK, XLF, XLE, XLV, XLY), and did any Treasury yield or rate move (10-year yield on 2026-08-29) correlate with that rotation? Use 2026-08-29 market data for sector ETFs and yields.
• Which heavily-traded mega-cap stocks moved the most on 2026-08-29 (e.g., NVDA, AAPL, MSFT, AMZN, GOOGL, META, TSLA, or any stock reporting earnings on 2026-08-29), and what were the company-specific headlines or analyst actions dated 2026-08-29 behind their moves?
• Did any US stock report earnings or issue materially market-moving guidance on 2026-08-29 (companies with earnings dates on 2026-08-29 such as retailers or tech names), and what were the post-earnings price reactions (%) during the 2026-08-29 session? Use earnings-calendar and quote data dated 2026-08-29.

Sources

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• https://www.dayoftheweek.org/?m=August&d=29
• https://www.timeanddate.com/date/weekday.html?year=2026&month=8&day=29
• https://vittarthi.com/markets/us
• https://stockmarkethours.org/stock-market-holidays-2026
• https://thestreetbrief.com/resources/stock-market-holidays
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• https://the-calendar.net/finance/stock-market-holidays-2026/
• https://wealthvieu.com/investing/stocks/stock-market-holidays/
• https://www.nyse.com/publicdocs/nyse/ICE_NYSE_2026_Yearly_Trading_Calendar.pdf
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• https://www.calendar-365.com/calendar/2026/August.html
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• https://247wallst.com/investing/2026/08/28/amazon-jumps-4-on-expanded-aws-chip-deal-why-is-nvidia-falling-4/
• https://www.financialjuice.com/News/9741024/
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• https://247wallst.com/investing/2026/08/28/optics-stocks-slide-as-ai-hardware-trade-cools
• https://247wallst.com/investing/2026/08/28/optics-stocks-slide-as-ai-hardware-trade-cools-
• https://247wallst.com/investing/2026/08/28/biontech-tumbles-8-as-colorectal-cancer-vaccine-trial-fails-moderna-drops-6-pfizer-holds-flat/
• https://www.latestly.com/business/stock-market-holidays-in-august-2026-full-list-of-nse-and-bse-closures-7536763.html
• https://www.cnbc.com/2026/08/26/stock-market-today-live-updates.html
• https://www.regardsofwallstreet.com/tools/market-hours
• https://www.stockbase.com/market-data/sectors
• https://www.cnbc.com/2026/08/27/stock-market-today-live-updates.html
• https://stockmarketwatch.com/indices/sp500/today
• https://countryeconomy.com/stock-exchange/usa?dr=2026-08
• https://finance.yahoo.com/quote/^GSPC/history/
• https://www.thestreet.com/stock-market-today/stock-market-today-dow-jones-sp-500-nasdaq-updates-aug-26-2026
• https://www.reuters.com/business/sp-500-end-2026-slightly-above-current-levels-profit-optimism-2026-08-26/
• https://www.investopedia.com/stock-market-today-dow-jones-s-and-p-500-nasdaq-08072026-12036199
• https://www.thestreet.com/stock-market-today/stock-market-today-dow-jones-sp-500-nasdaq-updates-aug-24-2026
• https://www.onedayadvisor.com/2026/06/market-sector-rotation.html
• https://wallstreeteconomicists.com/articles/stock-market-sector-rotation-2026
• https://algolabhk.com/en/blogs/august-sector-focus
• https://finance.yahoo.com/markets/article/wall-street-is-rotating-out-of-2026s-biggest-winners-chart-of-the-day-180639239.html
• https://soundmindinvesting.com/articles/sector-rotation-august-2026-update
• https://blog.carnegieinvest.com/monthly-market-commentary-august-2026
• https://www.morningstar.com/markets/markets-brief-big-2026-sector-rotation-ai-disrupts-disruptors
• https://equityclock.com/2026/08/27/stock-market-outlook-for-august-28-2026/
• https://westmountfundamentals.com/sector-rotation-analysis-2026
• https://publicholidayshub.com/stock-market-holidays/
• https://howmanytradingdays.com/stock-market-holidays
• https://www.aistockselection.com/en/us-stock-market-holidays/
• https://chartrow.com/sp500/sector-performance
• https://westmountfundamentals.com/sp500-sector-performance-study-2026
• https://dtf.horizonpublishing.com/sector-overview-august-28-2026/
• https://chartrow.com/sp500/sector-weights
• https://us500.com/sp500-companies-by-sector
• https://streetstats.finance/markets/sectors-industries
• https://finance.yahoo.com/markets/stocks/articles/jim-cramer-explained-turned-tide-033354732.html
• https://finance.yahoo.com/markets/stocks/articles/nvidia-drops-3-3-315-222706659.html
• https://finance.yahoo.com/m/6081bfc8-098f-3e6b-90be-d6e767fee376/
• https://finance.yahoo.com/m/601ba381-af35-348e-93ed-b6fcef529668/
• https://finance.yahoo.com/technology/ai/articles/microsoft-made-24-1-billion-031442842.html
• https://www.foxbusiness.com/technology/apple-implements-price-hikes-tv-streaming-service-one-subscription-bundle
• https://qz.com/apple-tv-streaming-price-hike-1499-082826
• https://finance.yahoo.com/markets/stocks/articles/apple-stock-rises-1-apple-171503282.html
• https://www.barchart.com/story/news/4324112/
• https://finance.yahoo.com/technology/ai/articles/353m-settlement-barely-dents-alphabet-181004583.html
• https://finance.yahoo.com/technology/ai/articles/meta-down-27-one-analyst-030438553.html
• https://finance.yahoo.com/markets/stocks/articles/meta-platforms-meta-just-called-165359951.html
• https://finance.yahoo.com/markets/stocks/articles/tesla-tsla-recalls-3-million-162300534.html
• https://weeklytrader.io/gainers.php
• https://www.tipranks.com/news/sp-500-top-stock-gainers-today-8-28-26
• https://tickerdaily.com/article/
• https://premarketprice.com/gainers
• https://www.siriusinvestors.com/stock/market-movers
• https://www.stocktitan.net/rankings/stock-gains-monthly/2026/august
• https://www.bloomberg.com/podcasts/series/stock-movers
• https://www.thestreet.com/stock-market-today/stock-market-today-dow-jones-sp-500-nasdaq-updates-aug-25-2026
• https://www.marketwatch.com/livecoverage/stock-market-today-dow-s-p-500-nasdaq-nvidia-earnings-results-inflation-data
• https://finance.yahoo.com/markets/live/stock-market-today-tuesday-august-4-dow-sp-500-nasdaq-100140227.html
• https://www.barrons.com/livecoverage/stock-market-news-today-082526
• https://tickerdaily.com/article/stock-market-today-august-28-2026-sandp-500-closes-at-record-high-on-jobless-claims-drop
• https://www.stocktitan.net/rankings/stock-movers-today
• https://thedesperatetrader.com/biggest-gainers-today
• https://stockanalysis.com/markets/gainers/week/
• https://www.morningstar.com/markets/movers

Trace Index

Tool-call traces are persisted under /srv/swarm_web_runs/run-1787977828233-0001/finance_output/traces.