The real story behind today's headline numbers isn't the index moves themselves — it's who did the moving. The S&P 500 and Nasdaq both hit fresh record highs, but the gains were narrow, driven by a handful of AI-infrastructure names like CoreWeave, Super Micro, Oracle, and Micron, while large-cap software names such as Microsoft, Salesforce, and ServiceNow actually fell. Cisco's after-hours plunge of 4.66% — despite beating consensus and touting $9 billion in AI orders — is telling: the bar for 'good enough' has climbed higher than even strong beats can clear. Goldman's Ben Snider flagging near-term risk if rate-hike talk returns (even at a modest 25% probability he assigns), alongside Ed Yardeni lifting his year-end S&P 500 target to 8,400, point to the same underlying truth from opposite directions: this rally has little slack, and needs earnings to keep delivering to justify current levels. Today's cool CPI print offered real relief, but that relief is ultimately a bet that AI-driven earnings keep beating expectations — a bet the market is making with less and less room for error.
📊 Top Movers
🧭 Sector Performance
🇰🇷 Korean Investor Perspective
Korean retail investors ('seohak-ants') are shifting capital abroad in size: $4.3 billion in net US stock purchases in July alone, plus another $278 million (about 390 billion won) in early August. The driver is a 33% plunge in the KOSPI from its June high, as Samsung Electronics and SK Hynix wobbled on semiconductor-slowdown fears and profit-taking. Notably, Micron (MU) ranked as Korean investors' second-largest net buy (about $161 million) after Amazon — meaning SK Hynix's own DRAM/HBM rival is being bought as a hedge-cum-alternative bet, which makes today's 4.92% Micron gain on AI memory demand doubly relevant. The won held steady at 1,416.61 per dollar (down just 0.70 won), so currency wasn't a major swing factor for unhedged investors today. Still, Bank of America's Michael Hartnett recently warned that investor optimism has 'overheated to its highest level since 2021' and recommended trimming risk-asset exposure — worth keeping in mind before chasing this rally further.
📊 Market Overview
The S&P 500 rose 20.30 points (+0.26%) to a fresh record close of 7,748.50, while the Nasdaq Composite gained 143.04 points (+0.54%) to close at 26,588.49. The Dow Jones Industrial Average edged down 21.58 points (-0.04%) to 53,770.27, essentially flat on the day.
Two forces drove the session. First, the July Consumer Price Index landed exactly in line with expectations, rising 3.4% year over year (down from 3.5% in June), confirming that inflation continues to cool. Core CPI also eased to 2.5% year over year (from 2.6%), weakening the case for further Fed tightening. Second, AI-infrastructure earnings blew past expectations, led by CoreWeave and Super Micro Computer, both of which surged roughly 20%. But the rally was narrow — large-cap software names including Microsoft (-2.26%), Salesforce (-2.10%), and ServiceNow (-2.04%) fell, weighing on the Dow.
🔑 Key Issues
1. July CPI lands exactly on consensus, confirms cooling inflation
July CPI rose 0.1% month over month and 3.4% year over year, matching the Dow Jones consensus exactly (down from 3.5% in June). Core CPI rose 0.2% month over month and 2.5% year over year, down from 2.6% in June. Shelter costs accounted for roughly two-thirds of the monthly increase, rising 0.1%, while energy fell 1.5% for the month (though still up 14.7% year over year). The report is being read as a sign that the earlier energy-driven inflation burst is fading; Goldman Sachs pegs the odds of renewed tightening at just 25%.
2. CoreWeave and Super Micro both surge roughly 20% on AI infrastructure demand
CoreWeave posted Q2 revenue of $2.58 billion (up 112% year over year), beating the $2.56 billion consensus, with a 5% adjusted operating margin that also topped estimates. The company raised full-year revenue guidance to $12.4–$13.2 billion and guided Q3 revenue to $3.4–$3.6 billion. Shares closed up 19.28% at $107.73. Super Micro Computer's Q4 revenue of $11.2 billion narrowly missed the $11.73 billion consensus, but gross margin nearly doubled to 17.5% from 9.5% a year earlier, driving an EPS beat of $1.70 versus the $0.62 estimate. The company booked more than $60 billion in new orders in the quarter and guided fiscal 2027 revenue to $65–$72 billion, well above the $52.5 billion consensus. Shares surged 19.02%.
3. Semiconductor and memory rally — Micron, Intel, Nvidia all gain
Micron rose 4.92% to $911.29 on strong revenue outlooks and expanding order backlogs from AI server infrastructure partners, reaffirming that next-generation AI server platforms require substantial high-bandwidth memory (HBM) and advanced DRAM volumes. Oracle climbed 5.36% to $153.28 as the cloud-AI rally widened (rebounding from a 3.7% drop the prior day tied to layoff reports), while Intel (+3.32%), Nvidia (+3.03%), and AMD (+1.82%) also gained, lifting semiconductors broadly.
4. Cisco sinks 4.66% after hours despite beating on every metric — "sell the news"
Cisco reported fiscal Q4 revenue of $17.3 billion (up 18%), exceeding the high end of its own guidance, with non-GAAP EPS of $1.22 versus the $1.17 estimate. Networking revenue grew 28%, and full-year fiscal 2026 AI infrastructure orders reached $9 billion. The company guided fiscal 2027 revenue to $72.2–$73.4 billion. Yet after rising 2.86% in the regular session, shares fell 4.66% after hours to $118.11 — a classic sell-the-news reaction to already-elevated expectations heading into the print.
5. SpaceX (SPCX) jumps on Musk's claim that AI revenue will eclipse the rest of the business
Elon Musk told employees in an all-hands meeting that AI revenue would "definitely" exceed all other SpaceX revenue combined as early as September and dominate by Q4. SPCX shares surged 9.65% to close at $146.15, helped further by news of a fresh Starlink launch. Morgan Stanley maintained its Overweight rating and $300 price target.
📊 Sector Performance
| Sector | Change | Key Driver |
|---|---|---|
| Technology | +1.49% | Micron, Oracle, Intel, Nvidia lead semiconductor/AI infrastructure strength |
| Real Estate | +0.93% | REITs gain on rate-stability hopes |
| Utilities | +0.48% | Defensive positioning plus low-rate benefit |
| Consumer Staples | +0.46% | Walmart strength ahead of earnings |
| Healthcare | +0.26% | Merck and select names gain |
| Financials | +0.21% | Modest bank-stock gains led by Wells Fargo |
| Energy | +0.16% | Individual names gain despite softer oil |
| Industrials | +0.10% | Honeywell strength offset by Boeing weakness |
| Communication Services | -0.90% | Meta's 3.38% drop weighs on the sector |
| Consumer Discretionary | -1.13% | Home Depot, Amazon, Tesla all decline |
| Materials | -1.24% | Commodity-linked names lag |
🌍 Global Markets
- Europe STOXX 600: 659.48 (-0.16%)
- Dollar Index (DXY): 99.98 (+0.16%)
- 10-Year Treasury Yield: 4.68% (essentially flat)
- WTI Crude: $82.58 (-0.75%)
- Gold: $4,469.00 (+1.96%) — rising alongside safe-haven demand
🚀 SPCX (SpaceX) Update
SPCX closed as the day's top gainer, up 9.65% at $146.15. The catalyst was Elon Musk's all-hands comment that AI revenue would "definitely" surpass all other SpaceX revenue combined by September and dominate by Q4 — he also mentioned plans to train xAI's Grok on SpaceX's internal data. A fresh Starlink launch added to the momentum.
The move comes even as the stock's first lockup expiration (roughly 20%, or 911.5 million insider shares) on August 6 already passed without a supply-driven selloff — shares actually rose 6% that day. That suggests today's surge reflects genuine business momentum rather than lockup-related dynamics. Still, Fundstrat's Tom Lee has flagged SpaceX's staggered lockup unwind (running through December 8) as a potential headwind for equities between August and October, making future unlock dates worth monitoring. Morgan Stanley maintains an Overweight rating and $300 price target.
⚠️ Investor Caution
Today's rally was narrow. While both major indices hit fresh record highs, the gains were concentrated in a handful of AI-infrastructure names, while large-cap software stocks including Microsoft, Salesforce, and ServiceNow actually declined. Cisco's 4.66% after-hours drop despite beating consensus signals just how high the bar has climbed for what counts as a good enough print. Bank of America's Michael Hartnett recently warned that investor optimism has overheated to its highest level since 2021 and recommended trimming risk-asset exposure, while Goldman Sachs flagged (albeit at a modest 25% probability) the risk of renewed rate-hike talk triggering a near-term pullback. With earnings season entering its later innings, single-stock volatility may increase — position sizing discipline is worth extra attention here.
👁 Tomorrow's Watch Points
- PPI and Initial Jobless Claims (8/13, 8:30 AM ET): The Producer Price Index is forecast at +0.2% month over month (versus -0.3% prior); a hotter-than-expected print could unsettle the rate-stability optimism today's CPI provided. Initial jobless claims are forecast at 202K (versus 199K prior) — a clearer sign of labor-market cooling would cut the other way, reinforcing rate-cut hopes, so watch both scenarios.
- Whether the S&P 500 holds above 7,750: Following the record close, the key question is whether this level firms up as support or gives way to profit-taking.
- Cisco's regular-session reaction: Whether the 4.66% after-hours drop carries into Thursday's regular session will be a useful gauge of market confidence in the broader networking/AI capex cycle.
- Applied Materials earnings (after close, 8/13): A read on whether Micron-driven memory strength is translating into capital equipment spending.
- Further SPCX developments: Watch for follow-through on Musk's AI-revenue comments and the impact of ongoing staggered insider-lockup unlocks on the stock.
💡 Next Events to Watch
- 2026-08-13: PPI, Initial Jobless Claims, Applied Materials earnings
- 2026-08-20: Walmart (WMT) Q2 earnings
📚 Sources
- Stock market today: S&P 500, Nasdaq edge higher on cooler inflation data, strong earnings — Yahoo Finance
- Stock Market Today (Aug. 12, 2026): S&P 500 climbs following key inflation report — TheStreet
- CPI inflation report July 2026: Prices rose 0.1%, annual rate 3.4% — CNBC
- Oracle Stock Surges 6.6% as Cloud-AI Rally Widens — Yahoo Finance
- Why Is Micron Technology Stock Gaining Wednesday? — Benzinga
- CoreWeave & Super Micro earnings are quieting AI concerns — Yahoo Finance
- S&P 500 hits record high after July CPI data; CoreWeave stock jumps 21% — Quartz
- Cisco Systems, Inc. (CSCO) Stock: Sink After Hours Despite Record Q4 Earnings — Blockonomi
- CISCO REPORTS FOURTH QUARTER AND FISCAL YEAR 2026 EARNINGS — PR Newswire
- Why SpaceX Stock Just Gained 11% — The Motley Fool
- Tom Lee Warns Of Bear Market-Like Moves In Nasdaq, S&P 500 — Yahoo Finance
- SpaceX rises 6% after more than 900 million shares are unlocked — CNN Business
- Yardeni Raises S&P 500 View to 8,400 on 'Fabulous Earnings' — Bloomberg
- Truist raises CoreWeave stock price target on capacity growth — Investing.com
- PPI and jobless claims highlight economic data due Thursday — Investing.com
- Walmart (NASDAQ:WMT) Trading Up 2.4% - Here's Why — MarketBeat
- Korean Retail Investors Pour $4.3 Billion Into US Stocks Amid Samsung, SK Hynix Plunge — BigGo Finance
- Korean Retail Investors Flee to U.S. Stocks Amid KOSPI Slump — Seoul Economic Daily