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Weekly NewsletterSeptember 26, 2026

Last Week on Wall Street - Week of September 28th

Bonds had a week. The ten-year yield ran to its highest level since before the financial crisis, the long end of the curve went back further still, and by Thursday it had stopped being a purely American problem.

Last Week on Wall Street - Week of September 28th
Last Week on Wall Street | Waterloo Capital
Waterloo Capital RESEARCH · WEEKLY DISPATCH
WEEK OF SEPTEMBER 28TH, 2026 THE WATERLOO RESEARCH DESK

Last Week on Wall Street

Market Summary · Weekly Close · Year to Date
S&P 5007,745▲ +1.23% WK▲ +13.13% YTD
Dow Jones51,792▲ +0.21% WK▲ +7.76% YTD
Nasdaq27,108▲ +2.21% WK▲ +16.63% YTD
10-Yr Yield5.17%▲ +17 BPS WK▲ +101 BPS YTD

The Bond Market Had a Terrible Week and Stocks Barely Looked Up

Treasury yields climbed to levels last seen before the financial crisis, oil finally gave some ground, and stocks decided the second thing mattered more than the first.

Bonds had a week. The ten-year yield ran to its highest level since before the financial crisis, the long end of the curve went back further still, and by Thursday it had stopped being a purely American problem. Stocks went up anyway. The S&P 500 and the Nasdaq both finished higher, the Nasdaq comfortably so, and the S&P closed within about a percent of its record. That is not the reaction the bond market was going for.

The reason is not complicated. Crude came down, and it came down because Tehran put a timetable on reopening the Strait of Hormuz. That is the first thing the energy side of this inflation story has offered anybody in months, and equity investors took it. Bond investors, who have watched the same shipping lane set the ten-year yield all month, would like to see the ships move before they believe it. In between, President Xi Jinping spent three days in Washington, ate a state dinner with half of Silicon Valley, and went home leaving the existing trade truce extended and not much else changed.

So the week ends with two markets holding opposite readings of the same news. Stocks are pricing the relief. Bonds are pricing the chance it does not arrive, or arrives too late, and that a Federal Reserve already halfway through an argument about a second increase will have to keep going. One of them is wrong. The Committee meets again in late October, and between now and then the ships either move or they do not.

BOTTOM LINE

Treasury yields reached levels this market has not seen since before the financial crisis, and stocks finished the week higher anyway, on the strength of a single offer made in the Persian Gulf. The tape is betting the oil comes down before the borrowing costs bite.

By the Numbers

The S&P 500's first winning week in three, after back-to-back losses through the Fed meeting
Close to the high: the index finished roughly a percent below its record close
Earnings are doing the work: third quarter S&P 500 earnings per share are projected to rise roughly 29% from a year ago
Bond market volatility: Treasury swings were on track for their biggest weekly jump in a year
Thin breadth: the indexes climbed while small caps and parts of technology lagged, an advance carried by fewer names than the headline suggests
A state visit without a deliverable: three days of talks in Washington produced an extension of the existing trade truce and little more

Two Stories That Moved the Tape

The Week's Defining Headlines

The Bond Rout Went Global, and the Long End Went Back to 2004

Illustration: an etched wireframe globe with rising strokes leaving it in several directions, beside a ladder of hatched bars climbing past a dashed threshold

The key takeaway, the thirty-year Treasury yield reached its highest level since 2004 this week, and it did not happen alone: Japanese, British and German government bonds sold off alongside it. The thing that set it off was an American economic report that came in too good.

The 30-year yield touched 5.501% on Thursday, a level it has not seen since June 2004, and the 10-year reached 5.223% on the way there. By the close, every point on the Treasury curve except the 2-year, which held near 4.90%, was trading above 5%, a configuration this market has not carried broadly since 2007. The proximate cause arrived Wednesday morning from S&P Global, whose flash purchasing managers surveys printed 57.0 for manufacturing against a 53.6 forecast and 58.7 for services against 55.8, consistent with an economy expanding at its fastest pace in more than five years. A Treasury buyback of up to $6 billion in longer-dated bonds, announced the same day, did nothing to slow the selling.

What separates this from last week is that it stopped being a domestic story. Japanese government bonds, British gilts and German bunds all sold off in the same stretch, which is what tends to happen when the world's benchmark risk-free rate moves and every other sovereign curve has to reprice against it. Federal Reserve Governor Michael Barr added to the pressure midweek, saying more increases will likely be needed to get inflation back to the 2% goal, and futures markets moved to roughly a 66% chance of another quarter point at the October meeting. The awkward part is the feedback loop underneath it: strong growth data now reads as bad news for bonds, so the better the economy prints, the more expensive it becomes to borrow against it.

Data That Drove the Story

The long end: the 30-year yield reached 5.501% Thursday, its highest since June 2004; the 10-year touched 5.223%
The trigger: S&P Global's flash PMIs printed 57.0 for manufacturing against a 53.6 forecast and 58.7 for services against 55.8
The odds: futures moved to roughly a 66% chance of another quarter-point increase in October

SOURCE: CNBC: 30-year Treasury yield hits highest level since 2004 →

 

Tehran Put a Week on the Table, and the Price of Everything Moved

Illustration: an etched vessel in a narrow strait between two hatched landmasses, with a blue course line opening ahead of it toward the sea

The key takeaway, Iran told a Japanese news agency it could reopen the Strait of Hormuz inside a week if Washington lifts the blockade. Crude fell through the $100 line and kept going. That sentence carries more weight than most diplomatic noise, because this one shipping lane has been setting American inflation expectations all month.

A senior Iranian official told Japan's Kyodo News on Tuesday that Tehran could reopen the strait within seven days if the United States ends its naval blockade of Iranian ports and halts military operations in the waterway, one of seven conditions the country's Supreme National Security Council set out for resuming talks. Brent fell about 3% on the day and broke below $100 for the first time in a week. By Friday's close Brent sat near $99 and WTI near $92, after another decline of better than two percent. Iranian officials spent the rest of the week working intermediaries around the United Nations General Assembly in New York, and a separate report had the Iranian president willing to negotiate before the American midterms.

The distance between a barrel and a kitchen table is shorter than it looks right now. The national average for regular gasoline sat near $4.50 and diesel near $6.50, and on Friday the University of Michigan's final September sentiment reading landed at 48.1, down from 51.7 in August and the weakest since May. The expectations component fell hardest, to 46.3. Unprompted mentions of gas prices reached 31% of respondents and mentions of tariffs reached 35%, up from 24% in July, while rising borrowing costs displaced high prices as the main complaint about buying a house or a car. Joanne Hsu, who runs the survey, noted that consumers do not expect relief at the pump. The market spent this week betting they are wrong about that.

Data That Drove the Story

The offer: Iran said it could reopen the Strait of Hormuz within seven days if the U.S. ends its blockade and halts operations in the waterway
The barrel: Brent broke below $100 and finished the week near $99; WTI settled Friday near $92
The consumer: final September sentiment fell to 48.1 from 51.7, with the expectations index down to 46.3

SOURCE: OilPrice: Oil tumbles as Iran floats a Hormuz reopening within a week →

Other Things Worth Knowing

Around the Water Cooler

Six stories from this week worth your morning coffee.

Books · Booker Prize

Two former winners are back on the Booker shortlist

Six finalists were named Tuesday in London, with Elizabeth Strout alongside past laureates Marlon James and Douglas Stuart. Mary Beard chairs the judges; the £50,000 goes out November 9.

Sports · Baseball

Milwaukee won 100 games for the first time in franchise history

The Brewers took the Central, the Dodgers tied the all-time mark of 14 straight postseasons, and the American League West is still a Houston and Texas argument with a week left.

Texas · State Fair

Big Tex got new Levi's and the fair cut its prices

The State Fair of Texas opened Friday in Dallas for a 24-day run. Admission, parking and rides all came down after a soft year, and the 55-foot cowboy is wearing 132 pounds of denim.

 

Space · Starship

Starship cleared its dress rehearsal for a first run at orbit

SpaceX fueled the 407-foot rocket at Starbase in South Texas on Thursday without lighting the engines. The orbital attempt is set for Monday morning.

Science · Asteroids

There is now an asteroid named after Weird Al Yankovic

Astronomers handed over the plaque in Tucson this week. Tom Lehrer got one too, which makes this a strong fortnight for the parody songwriting community.

Global · Diplomacy

Xi's state visit ended with tea, a tour and not much else

Three days in Washington produced an extended trade truce and a state dinner heavy on technology chief executives. Taiwan and artificial intelligence went unresolved.

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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.

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Last Week on Wall Street - Week of September 28th | Waterloo Capital