Mag7 Plunge Marks Worst Week Since Liberation Day, Oil Drops ~10% Weekly, Treasury Yields Fall to 4.37%
Claire Weston
The Mag7 each fell 3% to 8% this week — their worst since Liberation Day — yet eight of eleven S&P 500 sectors finished higher, as the gap between mega-cap pain and broad-market resilience became the market's defining tension.
Big Tech dragged the index — why didn't the rest follow?
The Mag7 account for over 30% of S&P 500 market cap. When that slice drops more than 5% in a week, gains from the other 490 stocks can barely dent the index-level loss.
This means → an index decline is not the same as "everything is selling off." A handful of heavyweight names are pulling the whole ship down.
Eight of eleven GICS sectors posted gains this week. The Dow and small caps outperformed; the S&P 500 equal-weight index has now overtaken its cap-weighted counterpart year-to-date.
Every traditional tailwind showed up — so why is the VIX still near 20?
Oil fell roughly 10% for the week. Core PCE inflation came in at +0.32% month-on-month, in line with expectations. The 10-year Treasury yield dropped over 10 basis points to 4.37% — all textbook positives for equity valuations.
In plain terms = cheaper oil, on-target inflation, lower borrowing costs — the classic "should rally" setup — and the Mag7 sold off anyway.
Goldman's Chris Hussey attributes this to the flip side of a "unified mega-market": concentration at the top is so extreme that when those names fall, no amount of good macro news can hold the index up.
AI capital spending — what is the market worried about?
Goldman's Ben Snider notes that investors must balance stronger-than-expected AI capex against the risk of a spending slowdown.
No clear sign of an AI spending pullback emerged this week, but some participants worry that repeated index highs may signal an approaching near-term top.
This means → whether the Mag7's valuation pressure eases hinges on next earnings season — specifically, whether AI capex is translating into actual profits.
Oil is back near pre-war levels — is the supply glut temporary?
After the Strait of Hormuz reopened, trapped Gulf inventories began flowing into the market. Combined with subdued Chinese buying, this created a short-term physical supply surplus.
The oil futures curve — the way contract prices line up by delivery month — offers a clue: front-month contracts have slipped into contango (near-month prices below far-month), while the back end remains in backwardation (far-month prices below near-month).
In plain terms = there is too much oil right now, but the market sees this as temporary, not a structural oversupply. WTI has fallen to its 200-day moving average, near pre-war levels.
A stronger dollar is pressuring what — and where does the rate-cut bet stand?
The dollar rallied this week, weighing on precious metals and crypto. Gold's chart flashed a "death cross" — the short-term moving average crossing below the long-term one, typically read as a bearish signal.
Goldman chief economist Jan Hatzius reiterated that the Fed will not cut rates this year, putting the bank at odds with current market pricing.
This reflects a macro tug-of-war: the market is still betting on cuts, but Goldman believes the data do not support that bet.
Content is for reference only, not financial advice.