Chile Markets: IPSA and the Peso, September 18, 2026
Key Facts
- The S&P IPSA rose 1.30% to 11,381.18 points, the strongest move of any major Latin American index on Thursday.
- The session was cut short, closing at one in the afternoon, on the eve of Chile’s Fiestas Patrias holidays.
- SQM led the index as lithium prices steadied, with its B shares quoted 3.2% higher after a long slide in the metal.
- The dollar closed at 962 pesos, up 0.69% on the reference feed, while the Santiago official print was 959.25, down 2.43 pesos in a session that ended at one.
- The currency is still 16.25 pesos weaker on the week, a sixth consecutive weekly rise for the dollar against the Chilean peso.
- The exchange is closed today and on Saturday, for Independencia Nacional and the Día de las Glorias del Ejército.
Today’s Focus
Chile closed its week early and closed it well. The S&P IPSA rose 1.30% to 11,381.18 points in a session that finished at one in the afternoon.
It was the strongest performance of any major regional index that day. Over the week the index gained 1.43%.
SQM was the engine. Its B shares were quoted 3.2% higher as lithium prices steadied, and the company carries the heaviest weight in the index.
Copper helped too, rising 1.22% on the London exchange to US$6.53 a pound. That was a third consecutive gain, worth 2.53% over the three sessions.
The currency reading depends on where you stop the clock. The reference close was 962 pesos, up 0.69%, while Santiago’s official print was 959.25, down 2.43 pesos.
What matters today. The exchange is shut today and Saturday, so Thursday’s reading stands until Monday. The weekly currency trend matters more than the daily one.
| Instrument | Level | Session |
|---|---|---|
| Ibovespa (Brazil) | 185,992.03 | +0.24% |
| S&P 500 (US) | 7,637.76 | +1.14% |
| Nasdaq Composite (US) | 26,418 | +1.69% |
| VIX (US volatility) | 15.44 | -12.82% |
| USD/BRL | 5.1289 | -0.48% |
| Gold (per ounce) | US$4,346.42 | +1.74% |
| Silver (per ounce) | US$65.43 | +3.44% |
| Oil fund (USO) | US$155.31 | -0.55% |
Thursday, 17 September 2026 close. Brent and gold in US dollars.
01 The session in one read
A half session is not a normal session and the numbers should be read that way. Volumes are thinner and conviction is harder to measure when the bell rings four hours early.
Even so, a 1.30% gain is a clear result. It came on the back of the index’s heaviest constituent rather than a broad sweep.
The dollar-denominated view removes the currency noise from Chilean equities. It shows the same September dip and the same recovery into the holiday.
The right-hand panel is the uncomfortable one. The dollar has risen against the peso for six weeks running, and Thursday’s fall barely dents that line.
02 The day’s numbers
| Measure | Level | Change | Read |
|---|---|---|---|
| S&P IPSA | 11,381.18 | +1.30% | Best regional performance of the day |
| IPSA, week to date | — | +1.43% | A fifth week in positive territory |
| USD/CLP (peso per dollar) | 962.00 | +0.69% | Santiago official print 959.25, down 2.43 pesos |
| USD/CLP, week to date | — | +1.73% | Dollar up 16.25 pesos, a sixth weekly rise |
| LME copper (per pound) | US$6.53 | +1.22% | A third consecutive gain for the metal |
| Banco Central policy rate | 4.50% | — | Held on 8 September, next meeting 26-27 October |
The two currency lines contradict each other and both are true. The daily move was a relief rally and the weekly move is the trend.
Copper is the variable that usually settles the argument. Three consecutive gains and a price 40.32% above September 2025 argue for the peso rather than against it.
The central bank line is the constraint on that argument. At 4.50% Chile pays far less than Brazil or Colombia, which leaves the peso more exposed to a firm dollar.
Live Market IntelligenceChile — Live Market Board
Rio Times · Live Market Intelligence
Chile — Live Market Board
+1.04%
167,921.80
-0.75%
69,779.20
-0.01%
10,360.64
+1.04%
2,848,945
—
2,490.92
+0.04%
| Instrument | Last | Change | YoY | Prev. | High | Low | Volume |
|---|---|---|---|---|---|---|---|
| IPSA | 10,360.64 | +1.04% | — | 10,254.15 | 10,722 | 10,633 | — |
| USD/CLP | 983.47 | -0.57% | +5.64% | 989.13 | 991.87 | 979.07 | — |
| COPPER | 6.65 | +2.24% | +29.44% | 6.51 | 6.66 | 6.54 | 37,751 |
| SQM-B | 59,350 | +5.00% | +41.63% | 56,525 | 59,500 | 56,800 | 139,333 |
| COPEC | 6,587 | +1.26% | -0.72% | 6,505 | 6,678 | 6,523 | 651,577 |
| BSANTANDER | 78.27 | +0.22% | +18.23% | 78.10 | 79.08 | 78.04 | 29,319,739 |
| FALABELLA | 6,537 | +0.57% | +12.38% | 6,500 | 6,569 | 6,451 | 521,197 |
| ENELAM | 83.60 | -0.61% | -7.37% | 84.11 | 85.95 | 83.33 | 17,436,403 |
| CENCOSUD | 1,818 | -0.12% | -37.29% | 1,820 | 1,836 | 1,810 | 1,172,754 |
| CMPC | 935.00 | -0.52% | -28.63% | 939.90 | 939.76 | 933.04 | 507,661 |
| BANCO CHILE | 192.44 | +0.90% | +20.05% | 190.73 | 192.99 | 190.73 | 16,978,917 |
| LATAM AIR | 22.04 | +2.04% | +4.75% | 21.60 | 22.20 | 21.81 | 859,178,133 |
| SOUTHERN COPPER | 192.19 | +3.32% | +50.65% | 186.01 | 193.86 | 185.75 | 649,631 |
Live Company IntelligenceSociedad Quimica y Minera de Chile SA ADR B — the full investor dossier
03 Why it moved — lithium found a floor
Lithium has fallen for most of this year and that has weighed on SQM throughout. On Thursday prices steadied, and the market treated stabilisation as good news.
SQM is the largest weight in the IPSA. A 3.2% move in its B shares does more for the index than a broad but shallow advance elsewhere.
Copper added the second leg. The London price rose 1.22% to US$6.53 a pound, with buyers in China returning and London inventories falling.
Neither driver is a Chilean policy story. Both came from outside, which is the usual pattern for an index this concentrated in resources.
04 The holiday that closes the week
Today is Independencia Nacional and tomorrow is the Día de las Glorias del Ejército. The Bolsa de Santiago is closed for both.
That is why Thursday’s session ended at one in the afternoon. It was the last full trading opportunity of the week.
Chilean names still trade through their New York listings until Monday. For local investors, Thursday’s close is the number that stands.
The practical effect for the region is thinner cross-border liquidity. Copper-linked flows lose one of their usual venues for two days.
Chile’s holidays are among the longest in the regional calendar. Trading volumes typically stay soft into the middle of the following week.
05 The regional scoreboard
| Market | Close | Session | Note |
|---|---|---|---|
| Ibovespa (Brazil) | 185,992 | +0.24% | Recovered from an intraday fall of 1.24% |
| S&P/BMV IPC (Mexico) | 63,873 | +0.58% | First session after Independence Day |
| S&P Merval (Argentina) | 3,061,512 | +1.08% | Rose while country risk climbed to 515 points |
| S&P IPSA (Chile) | 11,381 | +1.30% | Shortened session, closing at one in the afternoon |
| MSCI COLCAP (Colombia) | 2,521.85 | +0.40% | Index up while the peso fell 1.09% |
Chile led the region on the day and did it in four hours of trading. Every other major index also rose, so the direction was shared even if the size was not.
The currency picture split the region. The Brazilian and Mexican currencies firmed on the day while the Colombian peso weakened.
06 The policy backdrop
The Banco Central de Chile held its policy rate at 4.50% on 8 September. The next monetary policy meeting falls on 26 and 27 October.
Some economists have begun arguing for an increase at that meeting. The Federal Reserve’s move this week strengthens that case by widening the gap in Washington’s favour.
Politics supplied a smaller story on Thursday. The energy regional secretary for Coquimbo resigned after failing to prove his academic credentials.
That was the forty-eighth departure from the Kast government. None of it moved the index, but it is the drumbeat local investors hear behind the numbers.
Chilean assets remain a copper trade with a lithium option attached. Both metals moved the right way this week, which is why a shortened session still produced the region’s best return.
07 What to watch
- Monday’s reopening: Two days of global news will be priced into the IPSA in a single session.
- The weekly dollar trend: A seventh consecutive weekly rise would matter more than any single day’s move.
- Lithium prices: SQM’s gain rests on stabilisation holding rather than on a genuine recovery.
- Copper at US$6.53 a pound: A fourth consecutive gain would give the peso its strongest support in weeks.
- The central bank on 26 and 27 October: The first Chilean decision since the Fed moved, with hike calls now appearing.
More: Chile news in English, every day from The Rio Times.
Frequently Asked Questions
Where did Chile’s IPSA close on 17 September 2026?
The S&P IPSA closed at 11,381.18 points, up 1.30%. It was the strongest performance of any major Latin American index that day.
Is the Chilean stock exchange open today?
No. The Bolsa de Santiago is closed on Friday 18 September for Independencia Nacional and again on Saturday for the Día de las Glorias del Ejército.
What is the Chilean peso worth?
The reference close was 962 pesos, up 0.69%, while Santiago’s official print was 959.25, down 2.43 pesos. Over the week the dollar was still higher against the peso.
Why did the IPSA rise?
SQM led the index higher as lithium prices steadied after a long decline. Copper also rose 1.22% in London to US$6.53 a pound.
What is the Banco Central de Chile’s policy rate?
The rate is 4.50%, held at the meeting on 8 September 2026. The next monetary policy meeting is on 26 and 27 October.
Why did Thursday’s session end early?
The Bolsa de Santiago closed at one in the afternoon on the eve of the Fiestas Patrias holidays. It was the last trading day of the Chilean week.
Sources: La Tercera and Diario Estrategia closing reports for 17 September 2026; Diario Financiero on SQM and lithium; Bolsa de Santiago and Rankia trading calendars; Banco Central de Chile monetary policy meeting schedule; BioBioChile on the Coquimbo resignation; London Metal Exchange copper quotes via La Tercera.
This article was produced by The Rio Times’ automated newsroom system. How we use AI · Report an error · Editorial responsibility: Matthias Camenzind, Editor-in-Chief
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