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Weekly NewsletterAugust 22, 2026

Last Week on Wall Street - Week of August 17th

The S&P 500 closed Friday at 7,674, ending a three-week run of weekly gains.

Last Week on Wall Street - Week of August 17th
Last Week on Wall Street | Waterloo Capital
Waterloo Capital RESEARCH · WEEKLY DISPATCH
WEEK OF AUGUST 17TH, 2026 THE WATERLOO RESEARCH DESK

Last Week on Wall Street

Market Summary · Weekly Close · Year to Date
S&P 5007,674▼ -1.43% WK▲ +12.11% YTD
Dow Jones53,277▼ -0.85% WK▲ +10.85% YTD
Nasdaq26,180▼ -2.05% WK▲ +12.64% YTD
10-Yr Yield4.74%▲ +6 BPS WK▲ +58 BPS YTD

The Long End Ran the Week, and Stocks Did What They Were Told

Long yields at levels the market has not had to price in more than a decade, an intervention from Washington that lasted about a day, oil back near $95, and a three-week winning streak that finally ran out of room.

The S&P 500 closed Friday at 7,674, ending a three-week run of weekly gains. The Nasdaq gave up the most ground of the three, the Dow logged its second straight weekly loss, and the whole thing happened without a single scary print out of Washington's economic calendar. Friday itself was green, with the Dow adding roughly 500 points into the close. A good Friday does not undo the Thursday that came before it.

The pressure came from the far end of the curve, and the reasons behind it are stacking rather than rotating: federal deficit spending, a corporate bond calendar running at record size, and a wave of AI-linked issuance funding data centers, power contracts, and fiber. The Treasury Department stepped in midweek to lean against the move. The relief lasted about a day. Meanwhile crude came back toward $95 a barrel after the United Arab Emirates suspended all trade with Iran on Wednesday, which makes the inflation arithmetic at the long end harder in every direction at once.

For diversified portfolios, the notable thing about this week is not the size of the equity give-back, which was modest, but where the volatility actually lived. Stocks had no session worse than 1%. The bond market moved hard twice in five days and in both directions, and the asset that ran furthest was the one with no cash flows at all. Duration is doing something it has not done in a decade: paying a real coupon and swinging like an equity, at the same time. The portfolios sitting comfortably through a week like this are the ones that bought their fixed income for the yield rather than the trade, and are being paid to hold it while the long end argues with itself.

BOTTOM LINE

Long yields, not earnings, set the tone, and a midweek intervention could not hold it. For balanced portfolios, the week was less about a modest equity give-back than about where the volatility has moved: into the part of the market that is finally paying something to own it.

By the Numbers

Streak over: the S&P 500's three-week run of weekly gains ended; the Dow posted a second consecutive weekly loss
Global equities: the MSCI All Country World Index fell about 1.5%, its worst week in more than a month
Brent crude: quoted near $95.40 Thursday, roughly $28 a barrel above where it traded a year ago
UAE and Iran: the Emirates suspended all trade and financial transactions with Iran on Wednesday, having supplied more than 30% of Iranian imports
Corporate bond issuance: $1.68 trillion raised in the U.S. through mid-August, up 27% from the same stretch of 2025
AI-linked bond supply: roughly $220 billion across currencies so far in 2026, more than the whole of last year

Two Stories That Moved the Tape

The Week's Defining Headlines

Washington Doubled Its Bond Buybacks, and the Market Handed the Rally Back in a Day

Illustration: a large etched pipeline valve wheel beside a long rising yield line that dips and then snaps back to its prior level

The key takeaway, the Treasury told the market on Wednesday it would at least double the size of its long-dated bond buybacks. Long yields fell on the news, then gave the entire move back inside twenty-four hours. By Friday the long end sat roughly where it had started the week, which is to say near the highest levels in more than a decade.

Treasury Secretary Scott Bessent said the department would lift its long-dated repurchase operations from $2 billion to at least $4 billion apiece, effective September 9. Long bonds rallied on Wednesday, the way any market rallies when a very large buyer announces itself. By Thursday afternoon the move was gone. The 10-year finished the week near 4.74% and the 30-year near 5.25%, both back at the levels that prompted the intervention in the first place, and Bessent spent Friday promising the operations could get bigger still.

Buybacks change the shape of what is outstanding, not the size of what has to be issued, and that distinction is what the market spent Thursday pricing. A few billion dollars per operation is real support for liquidity in specific off-the-run issues; it is not an answer to a deficit, a record investment-grade calendar, and an oil price that keeps drifting up. The deeper number is the real yield: the 30-year inflation-adjusted rate touched roughly 3.0% in late July, the highest since 2008, meaning investors are demanding compensation for lending long that they have not asked for since the financial crisis. That is the message a fiscal authority cannot buy its way out of, and it lands a week before the new Federal Reserve chairman gives his first Jackson Hole address.

Data That Drove the Story

The operation: long-dated buybacks at least double, from $2 billion to $4 billion or more per operation, effective September 9
Where the long end finished: the 10-year near 4.74%, the 30-year near 5.25%, both around levels last seen more than a decade ago
Real yields: the 30-year inflation-adjusted yield reached roughly 3.0% in late July, its highest since 2008

SOURCE: CNBC: Longer-dated Treasury yields rise as the buyback rally fizzles →

 

Bitcoin Had Its Best Week in Two Years, and It Was a Rulebook That Did It

Illustration: an etched stone gateway standing open with a single line running up through the opening, while a row of hatched bars steps downward alongside

The key takeaway, bitcoin rose close to 23% over five sessions that took stocks lower and long yields higher, its biggest weekly gain in more than two years. The catalyst was not a price call. It was the first crypto-specific fundraising rule the Securities and Exchange Commission has written in its ninety-year history.

On August 18 the SEC published Regulation Crypto Assets, which lays out three ways a digital-asset project can raise money inside securities law: a $5 million exemption for startups, a $75 million exemption that requires audited financials, and a conditional safe harbor letting an asset exit securities classification once the managerial promises in its original investment contract have been fulfilled or abandoned. The next day the White House convened crypto and finance executives, with the president pressing Congress to move the CLARITY Act, whose House vote has slipped to September. Bitcoin touched $79,319 on Friday and spent the afternoon near $77,600.

Part of the move was mechanical: the Treasury buyback announcement pushed long yields down for a session, risk appetite followed, and roughly $3 billion of short positions were liquidated into a thin market. The rest is a repricing of regulatory risk that has hung over the asset class since 2023, when the operative question was which token was a security and the operative answer was whichever one the agency sued next. What makes the week worth noting is not the percentage. It is that the same five sessions produced the best crypto tape since 2024 and the worst equity tape in a month, from an asset that still sits roughly 38% below the record it set last October.

Data That Drove the Story

Weekly move: close to 23%, the biggest weekly gain in more than two years, with a Friday high of $79,319
The rule: Regulation Crypto Assets, published August 18, is the SEC's first crypto-specific fundraising rule in ninety years
Still off the high: the October 2025 record of $126,198 leaves the asset roughly 38% below its peak

SOURCE: CNBC: Bitcoin on track for 23% weekly gain as optimism floods back →

Other Things Worth Knowing

Around the Water Cooler

Six stories from this week worth your morning coffee.

Awards · Music

Madonna and Taylor Swift lead the 2026 VMA nominations

Madonna pulled eleven nods on Tuesday, Swift nine, Bruno Mars five. The show airs September 27, and fan voting runs until two days before.

Sports · Tennis

Jannik Sinner is out of the U.S. Open with a knee injury

The world No. 1 has not played since Wimbledon. Alexander Zverev inherits the top seed, and a third straight major opens a man short.

Texas · Longhorns

Arch Manning and No. 5 Texas open a playoff-or-bust season

The Longhorns start at home against Texas State in an afternoon kickoff, with most of October in Austin. That is the sort of scheduling luck that shows up in January.

 

Science · Space

NASA gave up on the mission to catch a falling space telescope

The rescue craft lost two of three reaction wheels and never reached Swift, which logged some 2,000 gamma-ray bursts on a two-year design life. It should re-enter by year end.

Art · Recovery

Ten million dollars of stolen Cézanne, Renoir and Matisse turned up in a television box

Italian police found the paintings in a Parma home twelve miles from the museum they left. Five arrests, and investigators suspect a link to fourteen other regional thefts.

Geopolitics · Gulf

The UAE suspended all trade with Iran after missiles landed in the Gulf

Two ballistic missiles came down near shipping lanes Tuesday night; Tehran denies firing them. The Emirates had been Iran's largest import gateway.

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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 August 17th | Waterloo Capital