10 things that mattered on Thursday, September 17, 2026
Stocks had their best day since early August the session after the Fed's hike, and bond yields and volatility both eased. Mortgage rates climbed to their highest since January 2025, and August housing starts fell.
- 01
The S&P 500 rose 1.1%, its best day since August 4
SPY closed at $762.60, 2.0% below its record. The Nasdaq 100 gained 1.7%, while small caps and the equal-weight S&P rose about 0.5%.
SPY, last six months SPY, last six months - 02
The 10-year yield fell 6 basis points to 4.95%
It slipped back under 5% a day after its highest close since 2007. It was the largest one-day drop since August 25.
10-year Treasury yield (%), last twelve months 10-year Treasury yield (%), last twelve months - 03
The VIX fell 2.27 points to 15.44
That is its lowest close since September 4. The Fear & Greed index climbed out of Extreme Fear to 31.
VIX, last six months VIX, last six months - 04
Chip stocks rebounded 3.4%
The iShares Semiconductor ETF rose to $519.10, recovering most of Monday's 5.5% drop. Dell rose 4.5% to a record close of $588.67.
SOXX (semiconductor ETF), last six months SOXX (semiconductor ETF), last six months - 05
Jobless claims fell to 198,000
Initial claims for the week to September 12 were 9,000 lower than the week before. Continued claims fell to 1.717 million, the lowest since May 2023.
Initial jobless claims, last five years Initial jobless claims, last five years - 06
Mortgage rates rose to 6.95%
Freddie Mac's 30-year average jumped 19 basis points in a week to its highest since January 2025. Two weeks ago it was 6.71%.
30-year mortgage rate (%), last five years 30-year mortgage rate (%), last five years - 07
Housing starts fell 2.6% in August
Builders started homes at a 1.275 million annual rate, down from 1.309 million in July and the lowest since May. Single-family starts rose, while apartment starts fell by nearly a quarter.
Housing starts (thousands, annual rate), last five years Housing starts (thousands, annual rate), last five years - 08
Jackson Financial fell 5.6% after a short seller's report
QVT Financial, which disclosed short positions in Jackson's debt and stock, alleged that its captive reinsurer defers hedge losses, building a $6.8 billion receivable equal to 137% of the insurer's statutory surplus. Jackson had not responded by the close, and the stock ended at $129.38.
JXN, last six months JXN, last six months - 09
Illumina rose 7.1% ahead of joining the S&P 500
The stock closed at $245.18, a 52-week high, for its third straight gain. It moves into the S&P 500 before Monday's open, so index funds buy it at Friday's close.
ILMN, last six months ILMN, last six months - 10
Due Friday: industrial production and quarterly expiration
August industrial production comes out in the morning. Friday is also the quarterly expiration of index options and futures, and the S&P index changes take effect after the close.
Data as of the Thursday, September 17, 2026 close. The ten items are picked by fixed rules from the site's daily data (the size of each move, signals that changed state, and economic releases weighted by importance), then checked and written by hand. Charts end on the brief's date. Research and education, not financial advice.