Why Did Tesouro Direto Rates Drop After the First Round?
The interest-rate futures market reacted with immediate relief to the outcome of the first round, triggering a sharp unwinding of risk that sent government bond yields tumbling. According to a report by InfoMoney, fixed-rate bonds dropped between 110 and 128 basis points compared to the previous Friday's close, while inflation-linked bonds (Tesouro IPCA+) fell between 65 and 76 basis points in the first trading session after the vote.
This widespread drop is technically known as a yield curve flattening. Before the election, institutional investors demanded an excessive premium to finance public debt across medium and long-term maturities, pricing in uncertainty over fiscal balance and the political makeup of Congress and state governments. With the election results tallied, the partial removal of that uncertainty cloud unleashed massive buying orders in DI futures contracts on the B3, transmitting the drop instantly to Tesouro Direto screens.
Fixed-rate bonds fell up to 1.28 percentage points in the first post-election trading sessionData compiled by InfoMoney at market open
For anyone reviewing fixed-income returns in the rearview mirror, the speed of this adjustment is striking. Movements of this magnitude in a single session are rare and typically occur only during drastic shifts in the macroeconomic scenario or decisive political events. The flattening was not isolated to a single maturity: it affected the entire term structure of Brazilian interest rates, hitting hardest where pre-election uncertainty was most concentrated.
How Large Was the Drop Between Fixed-Rate and IPCA+ Bonds?
The intensity of the decline depended directly on the bond's indexer, hitting the nominal yields of fixed-rate bonds harder than the real interest paid by inflation-linked securities. As InfoMoney data shows, the drop reached up to 1.28 percentage points across the various types traded on the public platform, ranging from 65 to 128 basis points.
The visual disparity between the two groups illustrates the classic dynamics of domestic fixed income. Fixed-rate bonds carry both inflation expectations, the real interest premium, and fiscal risk, meaning any relief in overall risk perception strips away all these layers at once. In Tesouro IPCA+ bonds, future inflation continues to be passed on to the holder; the rate displayed on the screen represents exclusively the additional real interest, which fluctuates within proportionally smaller, though still substantial, ranges.
This simultaneous contraction signals that the market corrected the exaggerated pessimism priced in during the weeks leading up to the election. When the yield curve flattens by this margin, financial players quickly adjust their projections for the terminal Selic rate trajectory, influencing not only federal government bonds but also the borrowing costs of corporate debentures, real estate receivables certificates (CRIs), agribusiness receivables certificates (CRAs), and bank credit notes (LCS/LCA).
What Does This Change for Investors Who Already Hold Bonds?
Investors who bought government bonds before the first round saw their financial balances jump immediately due to mark-to-market accounting. In sovereign fixed-income mechanics, the relationship between interest rates and a bond's Unit Price (PU) is strictly inverse: when the rate demanded by the market falls, the updated face value of the bond rises to balance the return promised through maturity.
If you purchased a fixed-rate or IPCA+ bond the previous week, your security is now worth considerably more in your custodial account. Investors who check their brokerage statement will find a short-term cumulative return well above the annualized contracted rate, creating an opportunity for early capital gains if they decide to sell back to the Treasury.
Unit prices surged; investors can redeem at a premium or hold until maturity, locking in the higher old rate.
New purchases enter with lower yields than Friday's, requiring discipline regarding maturities.
However, this early gain only materializes if the investor executes an early redemption. For those focused on holding the bond until its maturity date (the buy-and-hold strategy), short-term screen fluctuations do not alter the original contract in any way: the National Treasury will strictly honor the nominal rate or the IPCA plus coupon agreed upon at the initial purchase.
On the other hand, investors who were waiting for the electoral dust to settle before allocating their cash reserves or monthly contributions found a much less generous lineup. Fixed-rate yields that hovered near elevated levels lost up to 1.28 percentage points of gross annualized return, permanently reducing the financial flow for those entering the same thesis late.
What Scenarios Does the Fixed-Income Investor Face Now?
The trajectory of rates going forward depends on the consolidation of the political landscape in the second run-off and the fiscal scenario. The drop observed immediately after the first round eliminated the most glaring uncertainty premium, but the public debt market remains sensitive to the new government's commitments and the behavior of interest rates in the United States.
If the second round confirms an austere fiscal stance and the external environment helps, rates could fall even further, extending the profits of those already positioned in long-term maturities.
Populist rhetoric, institutional friction, or inflation surprises could steepen the yield curve again, giving back recent mark-to-market gains.
This bifurcation demands absolute clarity regarding time horizons. Trying to time the exact bottom or peak of the yield curve is speculative behavior, rarely recommended for ordinary retail investors. Those who bought long-term bonds solely to capture quick capital gains risk seeing rates rebound if second-round election news sours, turning virtual screen profits into temporary negative balances.
Meanwhile, investors building structural positions focused on specific retirement goals or asset purchases should not panic over missing the peak yield. Even after the relief reported by InfoMoney, the real interest rates offered by Tesouro Direto remain historically high for long-term purchasing power preservation.
If you already hold long-term fixed-rate or IPCA+ bonds purchased before the first round, do not sell on impulse just because your balance went up: selling early triggers income tax brackets and interrupts the compounding effect. If you have new money to invest, continue allocating steadily month by month, without trying to guess whether rates will drop further in the second round or rise again.
What to Monitor Next on the Yield Curve?
The government bond market will remain volatile until the presidential inauguration and the definition of budgetary plans. Three concrete variables will dictate whether Tesouro Direto rates settle at these new levels or seek new lows:
Second-Round Campaign and Economic Signals — Statements regarding spending caps, fiscal targets, and cabinet appointments typically move the long end of the yield curve instantly.
Copom Interest Rate Decisions — The drop in future rates opens room for cuts or pauses in the Selic rate; watch the Central Bank's minutes and official communiques on inflation convergence.
U.S. Treasuries and American Interest Rates — Yields on U.S. government bonds exert direct pressure on emerging economies. If rates rise abroad, domestic yields face a floor that is hard to break.
The drop of up to 1.28 percentage points reported by InfoMoney perfectly illustrates why fixed income is not entirely fixed along the way. Volatility exists and can generate both expressive gains and momentary losses for those operating outside the daily liquidity of Tesouro Selic. Understanding this mechanism protects portfolios against rash decisions during moments of electoral euphoria.
The plunge of up to 128 basis points in fixed-rate bonds and 76 basis points in Tesouro IPCA+ after the first round rewarded those who locked in positions during peak pessimism and raised entry prices for new contributions. If you are already invested, your contracted yield remains protected until maturity. If you have liquid funds to allocate, the safest path is to maintain steady, diversified contributions, avoiding placing all your bets on the short-term direction of the ballot box.
