Post-close recap — 2026-08-17

How the day closed

• S&P 500: 7,745.06, −40.70 (−0.52%)
• Dow Jones: 53,459.78, −272.63 (−0.51%)
• Nasdaq Composite: 26,644.91, −84.25 (−0.32%)

Stocks slid to start the week as a fresh geopolitical scare — the expiration of a US-Iran memorandum of understanding — sent crude and long-end yields sharply higher, denting risk appetite on an otherwise light macro calendar ahead of retail earnings and the Jackson Hole symposium (Yahoo Finance).

Sectors & breadth

• Winners: Energy (XLE) +1.4% led on the crude bid; Utilities +0.6% and Industrials +0.4% caught defensive/reflation flows.
• Losers: Health Care (XLV) −0.6%, Technology (XLK) −0.4%, and Consumer Discretionary (XLY) −0.4% lagged as duration got hit and consumer names remained under pressure from last week's weak retail sales print.
• Breadth: Negative — roughly 62.8% of US issues declined, with 1,324 Russell 2000 names down on the day (TradingKey).

Rates, FX, commodities, vol

• 10Y UST: ~4.69%, drifting higher with the long end
• 2Y UST: ~4.16%, little changed; curve steeper as the back end led
• 30Y UST: 5.31%, the highest yield since June 2007 on debt-supply and reduced cut expectations (Yahoo Finance)
• DXY: 99.65, −0.31% — third straight down day as softer US data trims Fed tightening bets
• WTI crude: firm, with Brent settling near $90–91/bbl on Iran escalation risk
• Gold: ~$4,400/oz, up on a softer dollar
• VIX: 15.19, +6.6% — off the floor but still contained

Drivers & headlines

• US-Iran flare-up: expiration of a US-Iran MoU on Monday pushed Brent to ~$90/bbl and sent long-end yields higher on inflation-risk repricing (Yahoo Finance).
• Long-end yields at cycle extremes: the 30Y at 5.31% marked a fresh post-2007 high, weighing on rate-sensitive equities and dragging health care and tech lower (Yahoo Finance).
• Fed pricing shifts: markets now put ~67% odds on a Fed hold in September (up from below 50% a month ago) ahead of FOMC minutes this week and Chair Warsh at Jackson Hole (StrongBuyAnalytics).
• AI capex, still the tape's structural bid: Nvidia disclosed a $105B financing package tied to an OpenAI data center in Ohio, keeping the AI infrastructure trade alive even on a red day (Yahoo Finance).
• Single-name standouts: Western Digital +6.5% and Marvell +5.8% on memory/semis strength; Constellation Brands −4.8%, Molson Coors −4.2%, and Datadog −3.8% on soft prints/guidance (Yahoo Finance / Globe & Mail).

After-hours

• Palantir (PLTR): Q2 EPS $0.41 vs $0.34 est, revenue $1.94B vs $1.81B est; US commercial revenue +149% y/y and 2026 US commercial guide raised to ">$3.42B" from $3.22B. Shares +4.6% after hours to ~$168 (Investing.com).

Setup for tomorrow

• Home Depot earnings pre-market Tuesday — first meaningful read on the health of the US consumer this week, with Lowe's (Wed) and Walmart (Thu) to follow (CNBC).
• Data: August flash Markit manufacturing PMI (9:45 ET), July construction spending, and ISM manufacturing (10:00 ET) — watch for confirmation of the soft-data slowdown that has been cooling Fed hike odds.
• Rates/oil to lead: any further US-Iran escalation keeps the 30Y > 5.30% narrative front and center and pressures equity multiples; a de-escalation likely bounces duration and mega-cap tech.

Sources: - Yahoo Finance — Stock market today, Monday August 17 - TheStreet — Stock Market Today (Aug. 17, 2026) - CNBC — Stock market next week: Outlook for Aug. 17–21, 2026 - Globe & Mail — Stock Market News for Aug 17, 2026 - TradingKey — US Stock Market This Week 2026-08-17 - StrongBuyAnalytics — Stock Market Outlook for Monday, August 17, 2026 - Investing.com — Palantir Q2 2026 earnings call transcript