US markets overnight: Bonds bite, barrels boom, and Tesla’s got a Monday to forget

The vibe check

Monday, May 18 was a session held hostage by the bond market, as US markets overnight served up a muted, tension-riddled result that left bulls and bears roughly where they started, but considerably less comfortable than on Friday. The 10-year Treasury yield climbed to around 4.63%, its highest reading in twelve months, after President Trump’s pointed comments about Iran and the Strait of Hormuz sent oil traders scrambling. Brent crude crossed $110 a barrel and WTI hit $106.65, the kind of numbers that make the Fed’s job harder and growth stocks feel expensive all at once. The VIX jumped 6.8% to 18.43, which is not red-alert territory, but is the sort of number that makes you sit up in your chair.

Numbers on the board — the Dow and the rest disagree

The S&P 500 slid 0.1% to 7,403 while the Nasdaq fared worse, dropping 0.5% to 26,091 as rate-sensitive tech names bore the brunt of the yield spike. The Dow, heavy in value stocks and industrials, bucked the trend and rose 0.3% to 49,686, which tells you everything about the rotation underway: if it has dividends and a smokestack, it was fine on Monday. The Russell 2000 fell 0.7% to 2,775, the weakest of the major indices and a reminder that US markets remain a challenging environment for smaller companies, which carry proportionally more floating rate debt and feel the pinch from rising borrowing costs faster than large caps.

On commodities, WTI at $106.65 and Brent at $110.12 added an inflationary layer that reinforced the higher-for-longer thesis. Gold retreated to test support around $4,546, Bitcoin slipped 1.5% to around $76,960 as risk appetite softened at the margin, and the US 10-year yield at 4.63% is the number that matters most: it is the discount rate against which everything else is valued.

The Magnificent 7 wrap — Tesla’s driving record gets another dent

The headline mover among the Mag 7 on Monday was Tesla, which fell 2.9% to close at $410. The bad news has been arriving in convoy: the US National Highway Traffic Safety Administration escalated its probe into 3.2 million Tesla vehicles using the Full Self-Driving system over concerns about performance in poor visibility conditions, an Australian court reportedly criticised Tesla’s cooperation in a collective lawsuit over alleged vehicle defects, and real-world robotaxi trials in Dallas and Houston have produced navigational hiccups that are hard to square with a stock still trading north of $400. Layer on Tesla’s own guidance pointing to negative free cash flow through the rest of 2026 as capital expenditure surges for Cybercab and Optimus development, and you have a company asking investors to fund a long-term vision while delivering short-term headaches. For now, many are choosing to pocket the proceeds.

Nvidia was the second notable mover, slipping 1.3% to close at $222 in what reads like pre-earnings caution more than a structural sell signal: the company reports Q1 FY2027 results on Wednesday after market close, with analysts expecting $79.2 billion in revenue and $1.78 in adjusted EPS, representing roughly 120% growth year on year. Nvidia has beaten EPS estimates in 21 of its last 23 quarters, so getting cold feet on the eve of the result is a time-honoured Wall Street tradition. Apple fell 0.8% to $298, modestly underperforming the broad market, while Alphabet finished essentially flat at $393, down just 0.1%. Meta closed unchanged at $614 and Amazon edged up 0.3% to $265, with Microsoft the best Mag 7 performer on the day, gaining 0.4% to $424.

Chip check — Seagate drops the factory bombshell

If there was a single set piece that defined the semiconductor narrative on Monday, it was Seagate. CEO Dave Mosley, speaking at a JPMorgan conference, was asked what it would take to add production capacity to meet surging AI demand, and responded that building new factories would ‘just take too long’. The market interpreted this as a structural supply bottleneck and sold Seagate down more than 8%, dragging Micron along for a near 6% decline, with SanDisk and Western Digital also falling.

The irony is that Mosley’s point was largely about preferring technology-driven capacity improvements over bricks and mortar, but when you’re priced on the assumption that AI infrastructure demand is limitless, nuance gets lost in translation. Nvidia, already under pre-earnings pressure, and Broadcom also dipped in sympathy, extending a rough day for the broader SOX index. AMD closed at $421 and held up better than most, with AI data centre tailwinds still providing a floor, though it was not immune to the general malaise.

One thing worth watching — Nvidia’s curtain call

Wednesday evening US time, Nvidia steps up to the earnings confessional and the result will set the tone for the entire tech sector into the back half of May. Analysts are forecasting $79.2 billion in Q1 revenue, up 79.5% year on year, alongside $1.78 in adjusted EPS representing 120% growth. The headline numbers are almost secondary: what the market will be parsing is Jensen Huang’s commentary on Blackwell demand, supply chain status, hyperscaler AI capex commitments, and whether Q2 guidance is enough to justify the valuation. A strong beat plus a bullish guide could reignite US markets in a meaningful way heading into the back half of the month. A guidance miss or even a muted outlook would sting, given the run the stock has had.

Australian investors with any exposure to Nvidia directly or via a global tech or AI infrastructure theme should have Wednesday evening firmly locked in the diary.