Ibovespa Ends Four-Week Winning Run as CSN Leads Steel Sell-Off
Key Facts
- The Ibovespa closed at 185,229.17, down 0.41%, and lost 1.06% on the week, its first weekly decline after four straight gains.
- The dollar ended at 5.1445 reais per dollar, up 0.30%, leaving the real weaker on the day and 0.46% softer across the week.
- Minerva led the index with a 4.46% gain, ahead of Multiplan at 4.39% and Construtora Tenda at 3.25%.
- CSN was the worst performer, down 6.72%, followed by CSN Mineração at 5.05% and MRV at 3.31%.
- The week’s losses came with the index still up 10.37% over one month, and its 14-day relative strength index at 71.6.
- Mexico’s IPC closed at 63,375.93, down 0.78%, while Colombia’s COLCAP rose 1.03% to 2,548.22, according to La República.
Today’s Focus
The Ibovespa fell 0.41% to 185,229.17 on Friday and 1.06% over the week. That ended a run of four consecutive weekly gains.
The dollar rose 0.30% to 5.1445 reais per dollar, leaving the real 0.46% weaker across the same five sessions. The commercial dollar closed at 5.144 reais, up 0.11%, according to Valor Econômico.
Friday’s session carried an options expiry on B3. Investors were also watching the presidential race and interest rates abroad.
The index remains 10.37% higher than a month ago. Its 50-day average sits at 176,694.28 and its 200-day average at 176,702.81.
Mexico and Brazil fell, while Colombia rose. Chile’s market was shut for Fiestas Patrias.
What matters today. Whether the index’s first weekly loss in five becomes a pause or the start of a deeper pullback. The 14-day RSI stands at 71.6.
| Instrument | Level | Session |
|---|---|---|
| Ibovespa (Brazil) | 185,229.17 | -0.41% |
| S&P 500 (US) | 7,650.50 | +0.17% |
| Nasdaq Composite (US) | 26,523 | +0.39% |
| VIX (US volatility) | 14.81 | -4.08% |
| USD/BRL | 5.1445 | +0.30% |
| Gold (per ounce) | US$4,380.01 | +0.77% |
| Silver (per ounce) | US$66.35 | +1.41% |
| Oil fund (USO) | US$153.82 | -0.96% |
Friday, 18 September 2026 close. Gold, silver and the oil fund in US dollars.
01 The session in one read
Friday’s decline was small in points and unremarkable in tone. The index moved between 184,460.91 and 185,991.47 before settling at 185,229.17.
Four straight weekly gains ended with a 1.06% loss. The dollar strengthened over the same stretch.
Mexico fell harder on the day, down 0.78%. Colombia rose 1.03% on the same session.
The American depositary receipts of Brazil’s largest companies mostly fell. Petrobras lost 0.67%, Itaú Unibanco 1.09% and Bradesco 1.44%.
Nu Holdings slipped 1.37% and Vale 1.80%. CSN (CSNA3) lost 12.16% over five sessions, according to Money Times.
02 The day’s numbers
| Measure | Level | Day | Week |
|---|---|---|---|
| Ibovespa | 185,229.17 | -0.41% | -1.06% |
| USD/BRL (real per dollar) | 5.1445 | +0.30% | +0.46% |
| S&P 500 | 7,650.50 | +0.17% | -0.08% |
| Nasdaq Composite | 26,522.54 | +0.39% | +0.72% |
| Dow Jones | 51,682.64 | -0.18% | -1.69% |
| VIX | 14.81 | -4.08% | -6.50% |
| Gold (per ounce) | US$4,380.01 | +0.77% | +0.73% |
| Bitcoin | US$80,901.46 | +5.89% | +4.83% |
The S&P 500 added 0.17% and the Nasdaq 0.39%. The Dow slipped 0.18% on the day.
Volatility kept falling, with the VIX down 4.08% to 14.81. It lost 6.50% over the week.
The dollar index was almost flat at 100.215, down 0.03% on the day. It still gained 1.10% on the week.
Gold rose 0.77% to US$4,380.01 an ounce and silver 1.41% to US$66.35. Gold gained 0.73% on the week and silver 3.05%.
Live Market IntelligenceBrazil — Live Market Board
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Brazil — Live Market Board
-1.73%
165,019.89
-1.73%
69,779.20
-0.01%
10,345.87
-0.28%
2,848,945
—
2,490.84
+0.00%
| Instrument | Last | Change | YoY | Prev. | High | Low | Volume |
|---|---|---|---|---|---|---|---|
| IBOV | 165,019.89 | -1.73% | +19.56% | 167,921.80 | 178,526 | 175,157 | — |
| USD/BRL | 5.34 | -1.32% | -0.84% | 5.42 | 5.42 | 5.30 | — |
| SELIC | 13.75% | — | — | — | — | — | |
| PETR4 | 53.31 | -1.06% | +77.70% | 53.88 | 53.70 | 52.83 | 43,239,500 |
| VALE3 | 62.88 | -2.33% | +1.98% | 64.38 | 64.43 | 62.80 | 24,652,300 |
| ITUB4 | 41.42 | -0.67% | +11.30% | 41.70 | 42.60 | 41.15 | 28,160,700 |
| BBDC4 | 15.69 | -1.63% | -13.88% | 15.95 | 16.30 | 15.67 | 65,766,400 |
| BBAS3 | 17.59 | +0.69% | -15.59% | 17.47 | 18.31 | 17.51 | 67,844,600 |
| B3SA3 | 15.27 | +1.33% | +21.71% | 15.07 | 15.78 | 15.20 | 75,282,000 |
| ABEV3 | 15.40 | +0.20% | +26.75% | 15.37 | 15.68 | 15.31 | 27,307,400 |
| WEGE3 | 45.78 | +2.81% | +10.06% | 44.53 | 47.08 | 45.06 | 9,823,200 |
| PRIO3 | 69.21 | -2.71% | +87.14% | 71.14 | 70.98 | 69.15 | 6,663,200 |
| SUZB3 | 47.14 | -0.55% | -3.79% | 47.40 | 47.84 | 46.10 | 7,151,800 |
| RENT3 | 31.14 | -1.67% | -20.73% | 31.67 | 32.68 | 31.02 | 19,092,400 |
| AZZA3 | 16.72 | +1.15% | -42.24% | 16.53 | 17.42 | 16.72 | 4,875,400 |
| CSNA3 | 4.76 | -4.99% | -47.09% | 5.01 | 5.14 | 4.76 | 14,327,900 |
| GGBR4 | 24.87 | -2.28% | +36.28% | 25.45 | 26.20 | 24.79 | 7,507,900 |
| ENEV3 | 26.79 | +0.45% | +49.78% | 26.67 | 27.35 | 26.30 | 12,263,000 |
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03 Why it moved — options expiry and election caution
Friday brought the expiry of equity options on B3. InfoMoney tied the session’s decline partly to that calendar effect.
Exame framed the week as a break in a four-week run. The presidential race and interest-rate decisions at home and abroad sat in the background.
Valor Econômico noted the index fell without support from the largest names. It cited weak blue chips, high domestic rates and election uncertainty.
Trading Economics tied Friday’s drop to inflation concerns after the September IGP-M release. Higher inflation readings limit room for faster monetary easing.
None of that is a single event. It is a market that had risen for a month pausing while it waits for the next clear signal.
04 The day’s movers
| Stock | Move | Note |
|---|---|---|
| Minerva (BEEF3) | +4.46% | Best performer in the index |
| Multiplan (MULT3) | +4.39% | Second-best gain of the session |
| Construtora Tenda (TEND3) | +3.25% | Homebuilder among the leaders |
| Auren (AURE3) | +3.18% | Energy name higher |
| CSN (CSNA3) | -6.72% | Worst performer in the index |
| CSN Mineração (CMIN3) | -5.05% | Second-worst loss of the session |
| MRV (MRVE3) | -3.31% | Homebuilder sold |
| Hapvida (HAPV3) | -2.97% | Health insurer among the laggards |
CSN’s fall was the session’s defining move. Reuters reported the steelmaker led the Ibovespa’s losses with no concrete news on its asset-sale process.
Money Times cited weaker iron ore, higher freight and softer steel consumption data. It also flagged doubts about possible delays in the sale of CSN Cimentos and CSN Infra.
The shares fell 12.16% over five sessions. Gerdau also declined, down 2.96% to 25.21 reais, about US$4.90, according to Estadão.
The steel complex moved together rather than stock by stock. That pattern left little room for single-name selection in the sector.
05 The regional scoreboard
| Market | Close | Day | Week |
|---|---|---|---|
| Ibovespa (Brazil) | 185,229.17 | -0.41% | -1.06% |
| S&P/BMV IPC (Mexico) | 63,375.93 | -0.78% | -0.86% |
| MSCI COLCAP (Colombia) | 2,548.22 | +1.03% | — |
| S&P IPSA (Chile) | 11,381.18 | — | — |
| Brazil fund (EWZ) | US$37.52 | -0.58% | -1.75% |
| Mexico fund (EWW) | US$73.34 | -1.28% | -2.71% |
| Latin America fund (ILF) | US$35.04 | -1.16% | -2.59% |
Mexico’s IPC closed at 63,375.93, down 0.78% on the day and 0.86% on the week. RT’s end-of-day feed shows 63,706.89, a snapshot taken before the close.
Colombia was the region’s outlier, with the COLCAP up 1.03% to 2,548.22, according to La República. The peso weakened 1.11% to 3,166.69 per dollar on the same day.
Chile’s market was closed on Friday for Fiestas Patrias. Its last IPSA close was 11,381.18 on Thursday, and the Chilean peso ended the week 1.75% weaker.
Argentina’s currency was at 1,514 pesos per dollar, and its ADRs fell. Central Puerto dropped 7.04% and Supervielle 4.06%.
EWZ lost 1.75% on the week, EWW 2.71% and ILF 2.59%. All three funds also fell on Friday.
06 The technical picture
The index sits above both its 50-day average of 176,694.28 and its 200-day average of 176,702.81. It remains 10.37% higher over one month.
The 14-day relative strength index reads 71.6. That places the index in overbought territory after the September run.
The 52-week range runs from 140,231.24 to 199,354.81. The index is closer to the top of that band than the bottom.
The 20-day range is 167,928.33 to 189,487.70. Friday’s close sits inside it, below the upper bound.
The dollar’s own 50-day average sits at 5.1294 and its 200-day at 5.1427. Friday’s close of 5.1445 is just above both.
07 What to watch
- BCB Focus survey, Monday: The central bank publishes its weekly economist survey at 08:30 Brasília time.
- Copom minutes, Tuesday: The central bank releases the minutes of its latest meeting at 08:00 Brasília time.
- IPCA-15, Friday: The IPCA mid-month CPI year-on-year is due at 09:00 Brasília time, with consensus at 4.5% against 4.24% prior.
- Mexico’s rate decision, Thursday: Banxico announces at 16:00 Brasília time, with the prior policy rate at 6.5%.
- Steel and mining shares: CSN’s 12.16% five-session slide leaves the sector’s asset-sale story in focus.
- The dollar above 5.14 reais: The 50-day average sits at 5.1294 and the 200-day at 5.1427.
Background: Brazil Markets: Ibovespa & the Real — September 1, 2026.
More: Brazil news in English, every day from The Rio Times.
Frequently Asked Questions
Where did the Ibovespa close on 18 September 2026?
The index ended at 185,229.17, down 0.41% on the day. It traded between 184,460.91 and 185,991.47 during the session.
How did the week go for Brazilian equities?
The Ibovespa fell 1.06% over the five sessions, its first weekly loss after four consecutive gains. The dollar rose 0.46% over the same stretch.
What is the dollar worth in Brazil?
The dollar closed at 5.1445 reais on Friday, up 0.30% on the day. That left the real 0.46% weaker across the week.
Which shares led and lagged the index?
Minerva rose 4.46%, Multiplan 4.39% and Construtora Tenda 3.25%. CSN fell 6.72%, CSN Mineração 5.05% and MRV 3.31%.
Why did CSN fall so sharply?
Reuters reported the steelmaker led the index’s losses with no concrete news on its asset-sale process. Money Times cited weaker iron ore, higher freight, softer steel demand and doubts about possible delays in the sale of CSN Cimentos and CSN Infra.
How did the rest of Latin America trade?
Mexico’s IPC fell 0.78% to 63,375.93, according to BMV, and Colombia’s COLCAP rose 1.03% to 2,548.22, according to La República. Chile’s market was closed for Fiestas Patrias.
Sources: B3 session data; RT end-of-day prices for 18 September 2026; InfoMoney, Exame, Valor Econômico, Finance News and NC News closing reports for 18 September 2026; Investidor10 for Brazilian single-stock moves; Reuters and Money Times on CSN; Estadão on Gerdau; La República for the COLCAP close; BMV for the Mexican IPC close; exchange data from Banxico, the Bolsa de Santiago and the Bolsa de Valores de Colombia.
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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