Week of Monday, Oct. 26 to Friday, Oct. 30, 2026. This was the week Wall Street started sending the AI bill: Alphabet (−13% for the week) and Intel (−25%) collapsed after earnings, and the Nasdaq lost 2.04%. In Colombia, the COLCAP slipped 1.48% and the central bank surprised everyone by holding rates at 12.25%.
Day by day
| Day | What moved markets |
|---|---|
| Mon., Oct. 26 | Anthropic files its S-1 to list on Nasdaq as ANT. |
| Tue., Oct. 27 | Tech lifts the Nasdaq 1.41%; Boeing sinks about 11%. |
| Wed., Oct. 28 | The Fed holds, as expected. |
| Thu., Oct. 29 | GOOGL −13%, NOW −27%; Nasdaq −1.55%. |
| Fri., Oct. 30 | INTC −30%, Nasdaq −3.13%; Colombia holds rates at 12.25% (4–3). |
Biggest weekly movers
- October: Nasdaq −5.68%, S&P 500 −1.40%, Dow +0.71%. Year to date the S&P 500 is up 10.23%.
- Oil: Brent ended at $113.43, up about 18% in October on the Iran conflict; XOM and CVX hit records.
- Small caps outperformed: the Russell 2000 rose 1.29% while megacap tech sold off.
Colombia: COLCAP, the peso and the ADRs
- COLCAP −1.48% to 2,490.92; still +20.25% in 2026. Grupo Sura (+6.15%) led; ISA (−5.29%) and Celsia (−4.68%) lagged.
- Rate hold: Banco de la República kept 12.25% in a 4–3 vote; the peso weakened toward 3,232 offshore afterward.
- ADRs: EC finished at $17.14 (−0.6% for the week) and CIB at $91.69 (−4.8%); COLO −1.9%.
What it means for your money
- 401(k) and IRA: diversified index funds dipped modestly (S&P 500 −0.7%); tech-heavy funds took the brunt.
- Concentration risk showed up: a handful of AI names moved the whole Nasdaq.
- Colombia exposure: currency swings mattered more than local stock moves this week.
Our take
Two messages. In the U.S., investors no longer reward AI spending on faith; they want returns and punish companies that cannot show them. In Colombia, a split central-bank pause raises a question for the peso, which has leaned on high rates all year: if the rate gap stops widening, the dollar has more room to rise. Not a prediction, but the variable to watch.
Next week
- Mon., Nov. 2: AAPL and PLTR after the close; Colombia closed.
- Tue., Nov. 3: U.S. midterms; AMD reports; Colombia reopens.
- Thu., Nov. 5: CIB results.
- Fri., Nov. 6: October jobs report.
More: Friday’s Wall Street close · Friday’s Colombia close · What to watch Monday.
Frequently asked questions
How did the stock market do the week of Oct. 26, 2026?
The S&P 500 fell 0.73%, the Dow 1.72% and the Nasdaq 2.04%, hit by Alphabet and Intel.
How did the S&P 500 do in October 2026?
It fell 1.40% in October and is up 10.23% year to date.
What was the worst stock of the week?
Among large names, Reddit (−38%) and Intel (−25%).
How did Colombia’s market do this week?
The MSCI COLCAP fell 1.48% to 2,490.92; Colombia’s central bank held rates at 12.25%.
Information only, not investment advice.
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