Why Is the Ibovespa Falling 3% Today?
It marks the third consecutive decline—each driven by a different catalyst. According to reporting by InfoMoney and MoneyTimes, the Ibovespa touched 170,333 points at 11:41 a.m. on Wednesday (28), sliding 3.06% from Tuesday's close. The downturn originated on Monday, when the confirmation of Luiz Inácio Lula da Silva's runoff victory sent the index tumbling 13.88% in its largest single-day drop in years. Over the following two days, the market failed to recover as the threat of an IOF financial transactions tax on tax-exempt fixed-income instruments and anticipation surrounding Wednesday afternoon's Federal Reserve decision compounded the selling pressure.
−14.32% across three trading sessionsInfoMoney and MoneyTimes, 10/28/2026—cumulative decline since Monday (10/26)
−3.06% relative to Tuesday; steepest intraday drop this Wednesday
Three consecutive sessions of losses following the election outcome
Down −0.58% on the day; currency pressure eased from its worst levels
The Monday That Dropped the Index by 13%
The shock was immediate. According to InfoMoney and MoneyTimes, the Ibovespa plunged 13.88% on Monday (26), hitting an intraday low of 169,516 points at 11:41 a.m., while foreign investors pulled R$ 2.8 billion from the B3 exchange the day after the election. The move reflected the unwinding of positions betting on a victory for Flávio Bolsonaro: once the final tally confirmed Lula, the market priced in the change in government all at once.
The damage extended beyond the broader Ibovespa. As tracked by MoneyTimes on Monday, the Small Caps index tumbled 26.92%—its sharpest single-day drop in history—while the real estate sector fell 28.63% and consumer stocks dropped 26.14%. These segments are the most dependent on cheap credit and income policies, making them the first to be repriced under an administration perceived as more expansionary.
On Tuesday (27), the market attempted to stabilize. The Ibovespa closed at 175,710 points (−0.51%) according to InfoMoney—a modest decline, but a decline nonetheless. On Wednesday, uncertainty returned in full force because the two critical questions left open on Monday remain unanswered: who will head the Ministry of Finance, and how the administration intends to manage public finances.
The IOF Threat That Rattled Holders of LCI, LCA, and CRI Notes
The second trigger on Wednesday stemmed from fiscal policy. According to the newspaper O Globo, the government is considering levying the IOF financial transactions tax on LCI, LCA, CRI, CRA, and tax-advantaged debentures—instruments currently exempt from income tax—via presidential decree. While the proposal remains speculative, the market did not wait for confirmation: any taxation on these securities strips away their primary advantage over Tesouro Direto government bonds, and the news alone reinforces the perception that the incoming administration will aggressively pursue tax revenues.
The impact on equities is not immediate, but it is real. More expensive tax-exempt fixed income means investors will demand higher yields to hold them—pushing up market interest rates, weighing on stock valuations, and making equities less attractive by comparison. This is the mechanism through which a tax policy shift in fixed income ultimately pulls down the stock market.
Uncertainty also persists regarding who will lead the Ministry of Finance. According to MoneyTimes, potential candidates under evaluation include Rafael Fonteles, Geraldo Alckmin, and Gabriel Galípolo. Until the market gains clarity on the fiscal anchor for the next four years, every headline hinting at revenue-raising pressure is interpreted as a sign of fiscal imbalance—and fiscal imbalance drives up long-term interest rates, compressing equity valuations.
The Stocks That Bled the Most This Wednesday
At 11:38 a.m., only three index stocks were trading higher, according to tracking data from InfoMoney. The steepest declines concentrated in retail and domestic credit—the sectors most sensitive to high interest rates and deteriorating consumer conditions. Santander Brasil (SANB11) deepened its losses after reporting weak third-quarter 2026 results: according to MoneyTimes, CEO Gilson Finkelsztain acknowledged that the bank faced a "challenging macroeconomic scenario due to elevated interest rates"—precisely the environment the market fears the new administration will perpetuate.
The Fed Steps In at 3 p.m.—And Could Turn the Tide
As Brazil digests the election shock, the afternoon brings the Federal Reserve's monetary policy decision. According to MoneyTimes and Forbes, the market priced in a 90.6% probability that interest rates would be maintained in the 3.75% to 4.00% per year range, based on the CME FedWatch tool. The Fed implemented its first rate cut—excuse me, its first rate increase since 2023 in September (25 basis points)—and markets are already pricing in another hike for December 2026.
Chair Kevin Warsh's press conference following the decision is the most anticipated event. If he confirms a pause and signals that the rate-hiking cycle will proceed gradually, external pressure on emerging markets will ease—and the Ibovespa could claw back some of its afternoon losses. If the tone is more restrictive, signaling faster rate hikes, the dollar will strengthen globally and Brazilian equities will retreat further. The fact that the dollar was already down 0.58% at 10:38 a.m. at R$ 5.32, according to MoneyTimes, indicates that external risk aversion was not at its peak this morning—leaving room for a technical rebound if the Fed delivers no surprises.
For investors tracking the long-term trajectory of the Ibovespa, it is worth noting that the index stood above 205,000 points prior to the election results and is now trading near 170,000. This repricing, concentrated in less than three trading sessions, suggests that a significant portion of the sell-off has already occurred. Yet the question the market cannot yet answer is: when will this uncertainty be given a face and a name?
A 3% drop in a single day is not a realized loss—but three consecutive sessions of declines warrant a review of your holdings. Consumer and credit stocks (MGLU3, BHIA3, and retailers broadly) remain the most vulnerable as long-term interest rates stay elevated. Tax-exempt fixed-income instruments deserve attention: if the IOF tax is enacted, their yields will need to rise to compensate, meaning previously purchased bonds will decline in value on the secondary market. Investors with a long time horizon and diversified portfolios do not need to act immediately; those concentrated in rate-sensitive assets should at least monitor the triggers outlined below.
The Fed's decision at 3 p.m. (Brasília time)—an expected pause is the baseline scenario; a hawkish press conference signaling faster rate hikes would drive the dollar higher and pressure emerging markets. Pay close attention to Warsh's tone, not just the headline rate.
Cabinet announcements, particularly the Ministry of Finance—this is the primary catalyst for the Ibovespa in the coming days. An orthodox profile would encourage investors to re-establish positions; a heterodox profile would extend foreign outflows. Until a name is announced, the risk premium remains.
Confirmation or dismissal of the IOF on tax-exempt instruments—if enacted by decree, LCI, LCA, CRI, and CRA notes lose their tax advantage; yields on these instruments would need to rise to remain competitive against Tesouro Direto, pulling long-term interest rates up with them.
The 170,000-point threshold on the Ibovespa—a close below 169,500 would confirm the continuation of outflows. Holding above 172,000 through the end of the session would open the door for a technical rebound tomorrow.
