Bonds Break Down

Long-term Treasury yields hit their highest since 2007 as Brent topped $90 and Wall Street fell for a second straight session.

Author

Elie Zakhour
August 18, 2026

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Market News

Oil Rises, Bonds Break, Chips Shrug

Wall Street spent Monday trying to hold two ideas at once: growth is slowing, but inflation risk is not. The S&P 500 fell 0.52% to 7,745.06, the Dow dropped 272.63 points, or 0.51%, to 53,459.78, and the Nasdaq slid 0.32% to 26,644.91. It was the second straight losing session, although the S&P still finished less than 1% from last week’s record. Translation: bruised, not broken. 

Oil supplied the first headache. With U.S.-Iran diplomacy stalled and traffic through Hormuz thinning, Brent settled up 2.65% at $90.87 and WTI gained 2.55% to $84.50. Energy was the only S&P sector in the green, up 0.87%. For producers, lovely. For airlines, retailers, the Fed, and anyone who has met a gas pump, less lovely. Expensive crude is basically an inflation push notification that cannot be muted. 

The bond market then made things worse. The 10-year Treasury ended near 4.72%, while the 30-year rose to 5.31%, its highest since 2007. Higher oil, fiscal anxiety, a sloppy recent bond auction, and heavy AI-related corporate borrowing all piled onto the long end. Long-duration stocks do not love having future cash flows discounted with a chainsaw, so an otherwise modest risk trim spread through rate-sensitive corners of the tape. 

Yet AI refused to trade as one blob. The PHLX Semiconductor Index rose roughly 1.6%; Sandisk jumped 8.9%, Western Digital 5.4%, Applied Materials 5.5%, and Micron 4.2%. Meanwhile, all seven Magnificent Seven stocks finished lower, with Meta down about 3.5% and Microsoft 3.0%, while software names sagged. Investors are paying the suppliers whose order books already show the spend… and giving the platforms a harder quiz on when those hundreds of billions become profits. 

The demand side offered NO comfort. Friday’s ugly U.S. retail-sales report and July payroll decline were still echoing as investors waited for Home Depot and Walmart to report this week. China joined in: July retail sales grew only 0.6% year over year versus 1.5% expected, while industrial output and fixed investment also missed. A synchronized consumer wobble is not recession proof, but it IS enough to make record-high valuations look slightly overdressed. 

Under the hood, 1,888 NYSE stocks declined against only 864 advancers, and spot gold rose 1% to roughly $4,420 an ounce. That is a cautious tape, not capitulation. With Fed minutes Wednesday and retail earnings stacked through Thursday, Monday felt like investors lowering the music before checking whether the floor is actually shaking.

Peel Take: Monday’s message was not “sell everything.” It was “stop pretending every risk can be cured with more AI capex.” Oil above $90 and a 30-year yield above 5.3% are a nasty tax on both margins and multiples. Our bias: favor businesses with pricing power, near-term cash flow, and visible AI orders; be suspicious of duration dressed up as disruption. 

What's Ripe

Argenx (ARGX) 16.04% 

  • ARGX closed at $987.84, up 16.1%, after positive Phase 3 ALKIVIA data sent the stock flirting with four figures.

  • Vyvgart Hytrulo beat placebo by 15.4 points on the study’s main measure at Week 52, with benefits appearing by Week 4 and lasting through the year.

  • The IMNM subgroup hit statistical significance, targeting roughly 20,000 U.S. patients with no approved treatment; the smaller dermatomyositis subgroup improved similarly but did not reach significance.

  • Peel Take: This was not biotech confetti. Argenx may have opened an entirely new franchise for an already-blockbuster drug. The catch is that excellent science and a $60 billion-plus valuation can both be true. Great print; lousy moment for a victory-lap market order.

Sandisk (SNDK) 8.88% 

  • Sandisk closed at $1,786.85, up 8.9%, leading the S&P 500 and pushing its 2026 gain to roughly 653%.

  • The stock extended last week’s 35% run after management projected mid-to-high-teens revenue growth for fiscal 2028–2030, with roughly 80% non-GAAP gross margins and 75% operating margins.

  • Monday added fresh fuel: enthusiasm for high-bandwidth flash, broader confidence in AI infrastructure spending, and U.S. pressure on Apple to avoid Chinese memory suppliers.

  • Peel Take: The AI-storage thesis is real; the stock is simply behaving as though NAND cyclicality has been legally abolished. Sandisk may grow into the hype, but after a sixfold year-to-date move, “I like the company” and “I should chase this candle” are very different sentences.

What's Rotten

Constellation Brands (STZ) 6.18%

  • STZ fell 6.2% to $130.56 after Berkshire Hathaway disclosed that it had exited its remaining stake in the Modelo and Corona maker.

  • Berkshire had already sharply reduced the position earlier this year before selling its remaining shares during the second quarter.

  • Peel Take: When Berkshire heads for the exit, Wall Street notices. The filing does not tell investors why the position was sold, but losing one of the market’s most closely watched shareholders was enough to put Constellation firmly in Monday’s penalty box.

L3Harris (LHX) 4.61%

  • LHX closed at $278.38, down 4.6%, after its chairman and CEO was ousted following a board investigation.

  • The board said Christopher Kubasik’s conduct violated company values but was unrelated to financial reporting, controls, customers, or operations. He receives no severance or accelerated equity.

  • Insider Sam Mehta takes over immediately; he previously ran divisions representing more than 80% of company revenue, and L3Harris reaffirmed its full-year outlook.

  • Peel Take: The governance headline is ugly, but the confirmed operational impact appears limited so far. Guidance remains intact and an experienced internal successor is already in place. The bigger risk is whether additional details from the investigation emerge. With guidance intact and an operationally credible successor already inside the building, this looks more like a reputation discount than a broken-business event… provided the board has disclosed the whole story.

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A company generates $720 million in annual revenue. Its Days Sales Outstanding (DSO) falls from 60 days to 45 days, with revenue unchanged. Approximately how much cash is released from accounts receivable?

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