Thursday, July 30th, 2026

A photograph of a terraced street at night in the first seconds after a long power cut has ended, the road still wet and holding the light. Along the left-hand terrace every window is suddenly lit warm yellow, one of them with a television flickering back on behind the curtains, and a street lamp part-way down the row is glowing a dull deep orange as it warms up. Front doors stand open and people are out on their steps in dressing gowns, one holding a candle, another holding a lit torch, looking up and along the street. Further down the row on the right the houses are still dark. Standing in the middle of the wet road, seen from directly behind and small against the length of the terrace, is a man in an off-the-rack mid-grey suit with tidy lavender side-parted hair, his hands clasped behind his back holding a small brown paper bag. He is facing the dark end of the street while everyone else faces the light. Nobody is looking at him.

The lights come back on

S&P 500 7,437.63 · +121.48 · +1.66%

Microsoft rose 15.51 percent, the largest single-day gain in the company's history, on a hundred and ten million shares against a normal thirty to forty-five. Sandisk rose 25.99 percent. Micron rose 18.36 the morning after falling 9.94. Western Digital 15.37, Applied Materials 14.97, AMD 13.00, Marvell 12.18, Intel 11.30; the semiconductor ETF rose 8.50 percent after five consecutive losing sessions, and the technology sector rose 5.50. The index gained 121.48 points, its largest rise of the summer, and gave back the entire Federal Reserve day in a single morning. And on the same afternoon Meta fell 7.95 percent, consumer staples fell 2.16, health care 1.64 and communication services 2.68. Second-quarter growth printed at 1.5 percent against a 2 percent forecast, with inflation at 3.7 year over year. This was not a market feeling better. It was a market moving very hard in two directions at once — the second of July again, running the other way and four times louder.

The photograph Retail on the Lit Street

The day's protagonist

Microsoft MSFT

Move: +15.51% to 451.10 — the largest single-day gain in the company's history

Microsoft closed on Wednesday at 390.54 and opened on Thursday at 437.90, a gap of forty-seven dollars and thirty-six cents, made a high of 458.69, and finished at 451.10 — up 15.51 percent on 110.2 million shares against a recent normal of thirty to forty-five million. It is the largest one-day gain in the history of a company that has been public since 1986. The cause was quarterly results and a forecast that told the market the money being spent on artificial intelligence was going to be paid for by revenue rather than by faith, which was the exact question the whole month had been arguing about — and which Alphabet had answered a week earlier, with a two-hundred-billion-dollar capital-expenditure number, to a seven percent penalty. Same industry, same week, opposite verdicts. The reason this page is not simply a relief rally is that Meta fell 7.95 percent on the same afternoon, gapping down from 585.61 to open at 526.00. One of the five largest companies in the world had the best day it has ever had, and another lost eight percent, in the same six and a half hours. Microsoft finished July up 24.58 percent, the best performer in this batch's universe. Meta finished it down 1.17. The index finished it down 0.13.

The deeper account

The index's own path has no drama in it whatsoever, which is worth noticing on the biggest up day of the summer. It opened seventy-four points above Wednesday's close, drifted down through the late morning to 7,373.08 at twenty past eleven, and then climbed all afternoon in small steady increments — 7,406, 7,413, 7,421, 7,425, 7,428, 7,431, 7,441 — to a high of 7,448.75 at ten past three, closing eleven points below it. That is the profile of a market being bought methodically for six hours. All of the violence in this session is in the names, and there is a great deal of it.

The scale of the recoil in the semiconductor complex is the part that ought to be uncomfortable. Sandisk had closed the previous session at 1,015.89, down 7.32 percent, having fallen 46 percent from where it began the month. On Thursday it rose 25.99 percent. Micron fell 9.94 percent on Wednesday and rose 18.36 on Thursday. The semiconductor ETF fell 5.38 and then rose 8.50. Between Wednesday's close and Thursday's close nothing whatsoever changed about the demand for memory, the cost of a fab, or the number of data centres under construction on earth. One company reported one quarter and said one encouraging thing about the future, and a hundred billion dollars of opinion reversed itself overnight.

And it was not general. This is the detail that keeps the page honest, and it is the reason for the photograph. On the afternoon that Microsoft had the best day in its forty-year public history, Meta fell 7.95 percent, having gapped down fifty-nine dollars at the open. Communication services fell 2.68 percent as a sector. Consumer staples fell 2.16 and health care 1.64. Seven of eleven sectors were higher, which is another way of saying four were not, on the best day of the summer. The street lit up and one house stayed dark.

Underneath all of it, the actual economy was reported that morning to have grown at 1.5 percent in the second quarter against a forecast of 2, with inflation at 3.7 percent year over year and the savings rate down to 2.7. Slower growth, sticky prices, and the largest one-day rise of the summer. If a month can do this on Wednesday and this on Thursday, then the flatness of the number it eventually printed is not peace. It is arithmetic, and the following afternoon it finished the sum.

The artifact

THE SUBSTATION SUPPLY LOG CIRCUIT OFF AT BACK AT the mill2:5011 past the yard2:5011 past the north terrace2:5011 past the shops2:5011 past the school2:5011 past the lamps2:5011 past the halls2:5011 past the station2:5011 past the west terrace 2:50 LOAD ON RESTORATION heavier than before it went ENGINEER'S NOTE whole board came up together at eleven minutes past. stood outside and watched the street light itself from one end to the other. one row still out. it is not the fuse.
The log for the night of the thirtieth. Nine circuits, eight of them back at the same minute in filament orange, and one — the west terrace — with its off-at time filled in and a rule drawn through the column where the other figure should be. Load on restoration, heavier than before it went. Four lines from an engineer who went outside to watch, and one sentence about the row that stayed dark.

The ledger — what actually happened

Measure Close Change Marginalia
S&P 500 7,437.63 +121.48 · +1.66% its largest one-day rise of the summer · opened 7,390.45, low 7,370.98 at 11:20, high 7,448.75 at 3:10 · a staircase with no serious setback after half past eleven. The whole of the Federal Reserve day, returned in one session
Microsoft 451.10 +15.51% the largest single-day gain in the company's history; opened 437.90, high 458.69, on 110.2 million shares against a recent normal of thirty to forty-five million
Meta 539.03 −7.95% on the same afternoon; it opened at 526.00, a gap of 59.61 below Wednesday's close. Communication services fell 2.68% as a sector, staples 2.16%, health care 1.64%
Sandisk 1,279.96 +25.99% Micron +18.36% the morning after falling 9.94%; Western Digital +15.37%, Applied Materials +14.97%, AMD +13.00%, Marvell +12.18%, Intel +11.30%
Semiconductors +8.50% the SOXX ETF, after five consecutive losing sessions. Technology rose 5.50% as a sector — more than five times the next one, industrials at +0.98%
Second-quarter GDP +1.5% below a 2 percent forecast, with PCE inflation at 3.7 percent year over year and down a tenth sequentially. Jobless claims 197,000; the personal savings rate 2.7 percent
VIX 17.09 −17.28% the largest single-day fall of the batch, from 20.66. Advancers led 2.2 to one on volume of 18 billion shares against a twenty-session average of 17.2 billion
Dow Jones Industrial Average 52,208.06 +613.92 up 1.2 percent; the Nasdaq Composite rose 2.8 percent to 25,122.18. Seven of the eleven sectors finished higher — which means four did not, on the best day of the summer

Sources

  1. Robinhood market-data feed — SPX 10-minute bars and day bar; VIX day bar; day bars with adjustment none for MSFT, META, SNDK, MU, WDC, AMAT, AMD, MRVL, INTC, SOXX, ETN, AMZN, TSLA, CAT, NVDA, AAPL, GOOGL and the ten sector SPDRs. All percentages on this page are computed from those closes. Pulled 2026-08-28
  2. Zacks via Yahoo Finance — "Stock Market News for July 31, 2026" (covers the 30 July session: index closes, sector ETFs, Microsoft's record single-day gain, Applied Materials, Micron, the PHLX Semiconductor rebound, the VIX, breadth, volume, and the second-quarter GDP, PCE, claims and savings-rate readings) — https://finance.yahoo.com/markets/stocks/articles/stock-market-news-july-31-134200801.html