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Weekly NewsletterOctober 10, 2026

Last Week on Wall Street - Week of October 5th

The S&P 500 and the Nasdaq both finished the week higher, and both of them earned it the hard way. Tuesday was a record close for each.

Last Week on Wall Street - Week of October 5th
Last Week on Wall Street | Waterloo Capital
Waterloo Capital RESEARCH · WEEKLY DISPATCH
WEEK OF OCTOBER 5TH, 2026 THE WATERLOO RESEARCH DESK

Last Week on Wall Street

Market Summary · Weekly Close · Year to Date
S&P 5007,812▲ +1.15% WK▲ +14.11% YTD
Dow Jones51,655▲ +0.93% WK▲ +7.47% YTD
Nasdaq27,366▲ +0.64% WK▲ +17.74% YTD
10-Yr Yield5.25%▼ -3 BPS WK▲ +109 BPS YTD

Three Moods in Five Sessions, and the Last One Won

Record closes to open the week, borrowing costs at levels this market has not seen in twenty-four years in the middle of it, an artificial intelligence scare on Thursday, and then a social media post that put the whole thing back together.

The S&P 500 and the Nasdaq both finished the week higher, and both of them earned it the hard way. Tuesday was a record close for each. Wednesday and Thursday took most of it back. Friday handed it over again in a single session. If you only looked at the tape once, on Friday afternoon, you would think it had been a quiet week.

The bond market ran the first half of it. The ten-year yield pushed to a level this market has not seen in more than two decades, and the minutes from the Fed's September meeting landed Wednesday afternoon with most of the committee still expecting another rate increase before the year is out. Stocks did not love that, though they did not really hate it either. The actual damage came Thursday, when the Financial Times reported that the revenue figure everybody had been using for OpenAI was considerably larger than the one the company has been giving investors. Semiconductors went straight down and took the index with them.

Then, Thursday night, a post. The president wrote that talks with Iran were productive and that there would be no attack before the November 3 midterms. Crude, which had spent the week climbing on the Strait of Hormuz and on a Category 3 hurricane shutting in most of the Gulf's oil production, gave a chunk of it back Friday morning. Technology rebounded, the tape went green, and the ten-year ended the week a few basis points below where it started. Tuesday brings a CPI print and the banks opening third-quarter earnings the same morning. That is a lot of weight for a market whose last two sessions moved hard in opposite directions for reasons that had nothing to do with each other.

BOTTOM LINE

Two record closes, a twenty-four-year high in long-term borrowing costs, an artificial intelligence scare and one post about Iran, and the net of all of it was a quietly positive week.

By the Numbers

Records on Tuesday: the S&P 500 and the Nasdaq both set closing records before giving ground over the next two sessions
The long end went with it: the 30-year Treasury traded near 5.61%, close to its own multidecade high
Crude's round trip: Brent traded near $104 and WTI near $90 midweek, then eased Friday on the Iran headline
Hurricane Isaias: roughly 63% of Gulf oil production shut in by Friday ahead of an expected Category 3 landfall
Initial jobless claims: 197,000 for the week ending October 3, still near the low end of the past year
Bitcoin slipped to roughly $81,000, after trading above $83,000 earlier in the week

Two Stories That Moved the Tape

The Week's Defining Headlines

Somebody Checked the Biggest Number in AI, and It Came Back Smaller

Illustration: an etched column of hatched blocks stopping well short of a dashed expectation line, with a blue bracket measuring the gap, beside three chip dies stepping downward

The key takeaway, a figure near $70 billion had been circulating among investors as OpenAI's annualized revenue. On Thursday the Financial Times reported that the company has been telling investors the real number is approaching $50 billion. The chip complex did not wait around for the explanation.

The Financial Times reported Thursday that OpenAI has told investors its annualized revenue is approaching $50 billion, roughly $20 billion below a number that had been passed around in late September. That larger figure, per the FT, came out of material shared with investors and was framed to line OpenAI up against Anthropic, which is now about a month from its own public listing. Part of the gap is arithmetic rather than demand: the two count annualized revenue differently, and Anthropic includes sales booked through its cloud partners while OpenAI does not.

The market's reaction was not proportionate to a definitional footnote. Semiconductors led the tape lower, with the Philadelphia Semiconductor Index off as much as 4% intraday before it trimmed the loss, and the names tied most directly to building AI capacity took the worst of it. That is the tell. The AI trade has been underwritten for two years by projections nobody has had to defend on a quarterly call, and a reported revision to one private company's top line was enough to open a four percent hole in the sector in an afternoon. Most of it came back Friday. The number that did the damage was not in a filing, was not audited, and did not come from the company, which is a useful thing to notice about a trade this size roughly a month before the first of these businesses has to start reporting in public.

Data That Drove the Story

OpenAI's annualized revenue: approaching $50 billion per the Financial Times, against a figure near $70 billion circulating with investors in late September
Why the gap: the two labs count differently; Anthropic includes revenue booked through its cloud partners, OpenAI does not
The reaction: the Philadelphia Semiconductor Index fell as much as 4% intraday Thursday before trimming the loss

SOURCE: CNBC: AI stocks sink on OpenAI revenue report →

 

Borrowing Costs Hit a Twenty-Four-Year High, and the Fed Said There May Be One More

Illustration: an etched ratchet wheel with a pawl arm resting against the next tooth, drawn in blue, beside a line climbing above a dashed prior-high marker

The key takeaway, the ten-year Treasury yield touched roughly 5.37% on Wednesday morning, its highest since 2002. Hours later the Fed's September minutes showed most of the committee still expecting another increase before year end. December is now priced as close to a sure thing.

The ten-year yield reached about 5.37% early Wednesday, a level last seen in 2002, then settled back toward 5.29% after a $39 billion auction of ten-year notes cleared. That afternoon the Federal Reserve released the minutes of its September meeting, which recorded that most participants viewed another rate increase as likely before the end of the year. By the close, the CME's FedWatch tool had the odds of a quarter-point move in December at roughly 83%.

Two things are running at once here and they do not usually run together. This tightening cycle started because energy costs were pushing inflation, not because the labor market was hot, and last week's payroll miss took October off the table without laying a finger on December. Meanwhile the long end has been climbing under its own power, on supply and on a term premium that has been quietly rebuilding all year. Yields have added more than a full percentage point since January while equities set records, which is a pairing the last twenty years of market history offers almost no guide to. The ten-year finished the week slightly lower than it started. That is the only part of this that looks calm.

Data That Drove the Story

Ten-year Treasury yield: touched roughly 5.37% Wednesday, its highest since 2002, before easing back toward 5.29% after a $39 billion auction
The September minutes: most participants viewed another rate increase as likely before the end of the year
December odds: roughly 83% for a quarter-point move, per CME FedWatch after the minutes landed

SOURCE: Markets News: US 10-year yield hits highest level since 2002 →

Other Things Worth Knowing

Around the Water Cooler

Six stories from this week worth your morning coffee.

Awards · Nobel

The Peace Prize went to a judge, not a politician

Oslo named Navi Pillay, the South African jurist who ran the UN human rights office, out of a field of 287 nominees Friday morning.

Science · Physics

He turned a cubic kilometer of Antarctic ice into a telescope

Francis Halzen took the physics Nobel for working out that South Pole ice could catch neutrinos, the ghost particles that pass through everything else. It worked.

Sports · Baseball

The Rays swept the Yankees, and October gets a rematch

Tampa Bay ended New York's season in three. The Brewers and Dodgers meet again in the NLCS starting Sunday in Milwaukee, one year after the last time.

 

Texas · Longhorns

Number one in the country goes to Dallas on Saturday

Texas is 4-0 and ranked first, Oklahoma is 2-2, and the Cotton Bowl has never once cared about either record.

Weather · Gulf Coast

Isaias strengthened all week and pointed itself at the coast

Evacuation orders widened along the Gulf on Friday ahead of an expected Category 3 landfall.

Tech · Wireless

Starlink bought the airwaves it needs to sell you a phone plan

SpaceX agreed Thursday to buy a nationwide 800 megahertz portfolio from Grain Management, the piece Starlink Mobile was missing. The FCC still has to sign off.

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About This Series

Last Week on Wall Street

Last Week on Wall Street is Waterloo Capital's weekly market recap, published every Monday morning to keep advisors and clients informed on the most significant developments from the prior trading week. Each edition synthesizes equity market performance, fixed income moves, macroeconomic data releases, and notable corporate earnings into a concise, actionable read — cutting through the noise so our readers can focus on what actually matters for long-term wealth management.

Our research team tracks the S&P 500, Dow Jones Industrial Average, NASDAQ Composite, and 10-year Treasury yield as primary benchmarks, while also covering sector rotations, commodity swings, and policy shifts from the Federal Reserve and Washington. When major cross-asset moves occur — such as the historic gold selloff covered in this edition — we dig into the mechanics and the likely ripple effects on diversified portfolios, helping clients contextualize volatility without reacting impulsively.

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Waterloo Capital's investment research is grounded in fundamental analysis and long-term thinking. We believe that disciplined, evidence-based investing — anchored in each client's specific goals, risk tolerance, and time horizon — consistently outperforms reactive decision-making driven by short-term headlines. Our weekly commentary is designed to inform, not alarm: we put market moves in their proper historical context so that clients can hold conviction in their financial plans through periods of uncertainty.

As an SEC-registered investment advisor headquartered in Austin, Texas, with offices across the Southwest and Southeast, Waterloo Capital serves high-net-worth individuals, families, and institutions. Our advisors use proprietary research like this weekly recap as one input among many — alongside in-depth portfolio reviews, tax planning, and estate strategy — to deliver comprehensive wealth management tailored to each client relationship. To learn more about how our investment philosophy and ongoing market research can serve your financial future, contact our team directly.

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