Markets opened September on the back foot. Oil led the decline in risk appetite: Brent crude closed Monday at $92.34, a 2.04% daily gain and 10.23% monthly rise, after U.S. strikes on Iranian rocket launchers left the Strait of Hormuz effectively closed. Only five tankers transited Sunday, down from 130 pre-conflict, while war-risk insurance premiums hit roughly 57 times normal levels. The stalled oil flows are keeping gasoline and diesel prices bid, reinforcing the inflation narrative the Fed continues to combat.

Stocks retreated from August’s AI-fueled rally. The S&P 500 fell 0.58% in Monday's session, the Nasdaq 0.62%, and the Russell 2000 dropped 1.9%. The VIX rose 6.6% to 15.91, not panic territory, but a clear break from July’s complacency. The twist: the same tech giants that drove the summer advance now weigh on the market. Amazon, Microsoft, Meta, and Alphabet have collectively raised 2026 capex guidance to $725-$740 billion, primarily for AI data centers and chips. Investors are questioning when the payoff will materialize.

Bonds offered the subtlest signal. The 2-year Treasury yield edged up to 4.34% Monday, with the 10-year at 4.73% (FRED DGS2, DGS10), maintaining a gently upward-sloping curve. The move was modest, but the message was clear: the market now sees the Fed’s next step as more likely to be a hike than a cut. The dollar, at 99.55 on the DXY, held steady. Tonight’s RBNZ decision could test that resilience. If New Zealand raises rates to 2.75% as expected, the kiwi will likely rally, forcing the Fed to confront questions about its own policy stance.

The bond market is the quietest room in the house right now, and it’s saying the most. The 2-year Treasury yield rose to 4.34% in Monday's session, while the 10-year held at 4.73% (FRED DGS2, DGS10). The positive slope normally signals confidence in growth, but the move was small, and the message was nuanced: the bond market isn’t panicking about a recession, but it’s not betting on a soft landing either. It’s pricing in a Fed that remains on guard, with a bias toward tightening if inflation proves stubborn.

The dollar held steady at 99.55 on the DXY, up 0.12% in Monday's session. That reflects confidence in the U.S. economy relative to the rest of the world, but it also presents a headwind for American exporters and a tailwind for importers. Tonight’s RBNZ decision could test that strength. If New Zealand raises its cash rate to 2.75% as expected, the kiwi will likely rally. The market is already pricing in a 57.6% chance of a Fed hike at the September 16 meeting, up from last week.

Oil remains the loudest signal. Brent crude closed Monday at $92.34, up 2.04% on the day and 10.23% on the month, as the Strait of Hormuz stayed effectively closed. Only five tankers transited Sunday, and war-risk insurance premiums are now roughly 57 times normal. This isn’t just a shipping problem, it’s an inflation problem. Gasoline and diesel prices are already reflecting tighter supply, and if the Strait remains closed, those prices will stay elevated, feeding directly into the Fed’s inflation calculus.

Crypto was the outlier. Bitcoin fell 0.87% in Monday's session to $77,901, and Ethereum dropped 0.61% to $2,452.54. Both remain sharply higher on the month, Bitcoin up 22.54%, Ethereum up 30.08%, but the pullback suggests the market is pausing after August’s rally. The bigger story may lie in stablecoins: Circle minted $5 billion in USDC last week, lifting total supply to $303.71 billion, a sign institutions are preparing for liquidity needs.

The Middle East remains the epicenter of today’s risk. The Strait of Hormuz stayed closed after U.S. strikes on Iranian rocket launchers over the weekend. Only five tankers passed through Sunday, down from 130 pre-conflict, while war-risk insurance premiums hit roughly 57 times normal rates. Iran has laid naval mines in key shipping lanes, and normal traffic will not resume until those are cleared. The U.S. is sending a guided missile submarine to the region, but the timeline for reopening the Strait remains uncertain. The longer it stays closed, the more the market will treat the Hormuz premium as a structural cost.

China is the other side of the equation. The country continues to buy Iranian oil despite U.S. sanctions, and its demand remains a key variable in the global oil balance. If China’s imports slow, the market will tighten further. For now, however, the focus remains on the Strait.

New Zealand is the wildcard tonight. The RBNZ is expected to raise its cash rate to 2.75% at 10 p.m. ET. If it does, the kiwi will likely rally, and the Fed will face renewed questions about whether it is falling behind.

SLB surges on data-center cooling deal.. Schlumberger jumped 9.2% in Monday's session to $60.1, after announcing a $4.1 billion acquisition of Kelvion, a thermal management company. The deal bets on soaring demand for data-center cooling, driven by AI and cloud computing. SLB is already up 21.88% on the month.

Tesla extends its rebound.. Tesla rose 5.5% in Monday's session to $367.95, extending its recent rally. The stock is now up 14.24% on the month, despite the broader market’s pullback.

ARM gives back some gains.. ARM fell 5.2% in Monday's session to $241.91, trimming some of its recent advance. The stock remains up 1.19% on the month.

Coinbase rides the crypto wave.. Coinbase climbed 5.3% in Monday's session to $188.12, extending its monthly gain to 28.41%.

Deere gains on industrial strength.. Deere rose 5.2% in Monday's session to $654.91, extending its monthly advance to 8.24%.

Shopify slips on valuation concerns.. Shopify fell 4.5% in Monday's session to $147.37, paring some of its recent gains. The stock is still up 25.95% on the month.

Honeywell and Target drag on industrials.. Honeywell fell 3.1% in Monday's session to $213.53, and Target dropped 3.0% to $160.88. Both stocks are now down sharply on the month.

XOM and CVX benefit from oil’s rise.. Exxon Mobil gained 2.9% in Monday's session to $160.95, and Chevron rose 2.1% to $206.14, both lifted by the surge in oil prices tied to Strait of Hormuz disruptions.

The Fed remains the center of gravity. Chair Kevin Warsh’s speech at Jackson Hole last Friday was the clearest signal yet that the Fed is not done fighting inflation. Warsh said the central bank has “work to do” to bring inflation down to its 2% target. The market now prices a 57.6% chance of a hike at the September 16 meeting. The 2-year Treasury yield rose to 4.34% in Monday's session (FRED DGS2), reflecting that shift in expectations.

The dollar held at 99.55 on the DXY, but the Fed’s next move could alter that. If the Fed hikes in September, the dollar will likely strengthen further, pressuring emerging markets and U.S. exporters. If it doesn’t, the dollar could weaken, and the Fed will face questions about its credibility.

The bigger picture is that the Fed is still walking a tightrope. Inflation remains sticky, but growth is slowing. The bond market’s gentle upward slope suggests it is not panicking about a recession, but it is not betting on a soft landing either. The Fed’s next move will depend on the data, and the Strait of Hormuz is now a key variable in that equation.

The Strait of Hormuz closure is the causal chain driving today’s market. Fewer tankers through the Strait → reduced oil supply → higher crude prices → higher gasoline and diesel prices → higher inflation → Fed holds rates higher for longer → higher borrowing costs for mortgages, car loans, and credit cards. The bond market is already reflecting this: the 2-year Treasury yield sits at 4.34% (FRED DGS2), and the market prices a 57.6% chance of a Fed hike in September.

But the Strait isn’t just an oil story. It’s also a shipping story. War-risk insurance premiums are now roughly 57 times normal, and some insurers have withdrawn coverage entirely. That means even if oil finds alternate routes, the cost of moving it will be higher. If the Strait stays closed, those costs will remain elevated, embedding a persistent bid under energy prices that doesn’t fade with the headlines.

The other side of the equation is demand. China continues to buy Iranian oil despite U.S. sanctions, and its demand remains a key variable in the global oil balance. If China’s imports slow, the market will tighten further. For now, however, the focus remains on the Strait. The longer it stays closed, the more the market will treat the Hormuz premium as a structural cost. Watch the bond market: if the 2-year yield keeps rising, it signals the Fed is getting serious about hiking again.