Up to this point, we have lent money to the country's safest borrower: the National Treasury. Today, we are changing counters — we will lend to banks and companies. And the moment we do that, a character that has been asleep since Lesson 1 wakes up for good: credit risk.Lending to someone who may not repay requires compensation. That compensation has a name (credit spread), partial insurance (FGC), a hierarchy of claims and a silent partner that many people forget to include in their calculations: Income Tax. By the end of this lesson, you will be able to answer the question in the article's title — and, more importantly, you will know WHY the answer is "it depends", and what it depends on.1. The price of trust: credit spreadsIn Lesson 1, we saw that banks charge a spread for providing intermediation. Now we are looking at the spread from the other side: what you demand in exchange for taking on someone else's risk.The benchmark is always the same: the risk-free rate (Selic/CDI for short maturities; the yield curve for longer ones). Every private issuer pays the benchmark plus something — and that excess is the credit spread, the price of the possibility of default.The intuitive hierarchy: a systemically important major bank pays slightly more than the CDI (100%–105% of the CDI); a mid-sized bank pays more (110%–130% of the CDI); a solid company issues a debenture at CDI + 1.5%–2.5%; a riskier company, CDI + 4% or more — when it can issue one. The greater the perceived risk, the greater the required spread. The professionals who assess this risk are the rating agencies (S&P, Moody's, Fitch), with ratings ranging from AAA to D.Two CDBs with the same maturity are offered: one by a large systemically important bank at 102% of the CDI and another by a mid-sized bank at 122% of the CDI. The difference in rates is mainly explained by the...Answer: Higher perceived credit risk of the mid-sized bank — the spread is the price of risk. Taxation and FGC coverage are identical for both CDBs; that is precisely why the difference in rates can only reflect the issuer's risk.2. CDBs: lending to the bankThe CDB (Bank Deposit Certificate) is the security a bank issues to raise money — the same money it will then lend out at a spread, completing the cycle discussed in Lesson 1.There are three types of returns, the same three categories you already know from Lesson 1: fixed-rate (13% p.a.), floating-rate (110% of the CDI — the dominant format) and hybrid (IPCA + 6.5%). Liquidity varies: some CDBs offer daily liquidity (you can redeem at any time, but the rate is lower), while others have a fixed maturity (your money is locked in until the maturity date, but the rate is higher — the reward for patience).2.1 The FGC: the safety netWhat makes CDBs unique among private credit instruments is the FGC (Credit Guarantee Fund): a private entity funded by the financial institutions themselves that returns your money if the issuing bank fails. The rules that may appear on the exam:Coverage of up to R$ 250 thousand per CPF/CNPJ and per financial conglomerate (including principal and interest).An overall cap of R$ 1 million per CPF, renewed every 4 years, taking all institutions into account.It covers CDBs, LCIs, LCAs, LCs and savings accounts. It DOES NOT cover debentures, government securities, investment funds or CRI/CRA.The FGC explains why investors are willing to accept CDBs from mid-sized banks paying 120% of the CDI: within the coverage limit, credit risk is effectively transferred to the fund. The lesson is to respect that limit — anyone who invests R$ 400 thousand in a single mid-sized bank has R$ 150 thousand genuinely exposed to the issuer's risk.An investor put R$ 300,000 into CDBs issued by a single bank, which subsequently failed. Considering principal and interest, the amount covered by the FGC is...Answer: R$ 250,000 — the limit per CPF and per financial conglomerate. The excess R$ 50 thousand becomes a claim to be filed in the bank's liquidation, with an uncertain outlook. Diversification across institutions is the antidote.3. Debentures: lending to a companyA debenture is a debt security issued by non-financial corporations — the company raising money directly from investors, without a bank in between (the direct intermediation discussed in Lesson 1). Everything governing the security is set out in the deed of issue: maturity, returns, collateral, amortization and covenants (the issuer's commitments, such as debt limits, whose breach may accelerate maturity).3.1 The hierarchy of collateralNot all debentures carry the same risk within the same company. The type of collateral determines where the debenture ranks in line in the event of default:Secured by collateral — backed by specific assets (real estate, machinery) that the issuer cannot sell. First in line.Floating charge — a general claim over the company's assets, but without tying up specific property.Unsecured (no preference) — ranks equally with the company's other unsecured creditors. This is the market standard.Subordinated — paid after ALL creditors, with only shareholders behind it. Naturally, it pays the highest spread.3.2 Tax-incentivized debentures: the government's pushTo finance infrastructure (roads, energy, sanitation), Law 12.431 created tax-incentivized debentures: individuals receive a full exemption from Income Tax on their returns. They are typically long-term and linked to the IPCA — cousins of NTN-Bs, with credit risk replacing sovereign risk. Remember: no FGC. A debenture holder is protected by the guarantees in the deed and the issuer's financial health, not by a guarantee fund.In the event of liquidation of the issuing company, a subordinated debenture gives its holder priority of payment over whom?Answer: Shareholders only — subordinated debt is last in line among creditors and is paid only before the owners. That is why it is the type that pays the highest spread.4. The silent partner: taxationThis is where naive comparisons turn into bad decisions. Traditional fixed-income investments are subject to withholding Income Tax at declining rates on their returns, depending on how long the investment is held:Up to 180 days: 22.5%. From 181 to 360 days: 20%. From 361 to 720 days: 17.5%. Over 720 days: 15%.(Redemptions in less than 30 days are also subject to declining IOF tax — from 96% of the return on the 1st day to zero on the 30th.)Then there are the tax-exempt investments for individuals: LCIs and LCAs (backed by real estate and agribusiness loans, with FGC coverage) and tax-incentivized debentures (without FGC coverage).4.1 Comparing apples with apples: grossing upHere is the most common mistake made by novice investors: comparing 100% of the CDI (taxable) with 90% of the CDI (tax-exempt) and assuming the former performs better. Let's run the numbers, using a CDI of 15% per year and a term of more than 2 years (15% Income Tax):CDB at 100% of the CDI: gross return of 15.0% → net return 15% × (1 − 0.15) = 12.75% per year.LCI at 90% of the CDI: 13.5% per year, net from the outset.The "lower" LCI wins comfortably. To avoid doing this calculation every time, the market uses gross-up: converting a tax-exempt rate into its gross equivalent by dividing it by (1 − tax rate):Equivalent rate = tax-exempt rate / (1 − tax rate) → 13.5% / 0.85 = 15.88% → 15.88/15 = ~106% of the CDIIn other words, an LCI at 90% of the CDI is equivalent to a CDB at 106% of the CDI over this term. Any CDB below that level loses out to it.With 15% Income Tax (a term longer than 720 days), a tax-exempt LCA paying 85% of the CDI is equivalent to a taxable CDB paying approximately...Answer: 100% of the CDI — gross-up: 85% / (1 − 0.15) = 85% / 0.85 = 100% of the CDI. Quick rule for the 15% tax rate: divide the tax-exempt rate by 0.85.A double exam trick: (1) the Income Tax rate depends on the INVESTMENT TERM, not the benchmark; (2) the exemption for LCIs/LCAs/tax-incentivized debentures applies to INDIVIDUALS — companies pay Income Tax as usual. Exam boards test both misconceptions.5. Building the decision frameworkThe choice among private securities comes down to four questions, in this order:1. How long will the money be invested? This determines the Income Tax rate, the need for liquidity and which securities are candidates.2. What is the NET return on each candidate? Gross up everything; comparing a gross return with a tax-exempt one is the cardinal mistake.3. What is the credit risk — and is there FGC coverage? Within the FGC limit, bank risk is mitigated; with debentures, analyzing the issuer and the collateral is essential.4. Does the premium compensate for the risk? A fat spread on an unsecured security without FGC coverage may be exactly what it appears to be: inadequately compensated risk dressed up as an opportunity.“Gross returns are window dressing; wealth is built with net returns and an issuer that pays.”- Fixed-income allocator's maxim6. Bringing it all togetherThe essential points from the lesson:Private credit pays the risk-free rate plus a spread, which increases with the issuer's risk — assessed, among other ways, by rating agencies.The CDB is the bank's debt, available in the three return structures, with the FGC safety net: R$ 250 thousand per CPF and conglomerate, with an R$ 1 million cap renewed every 4 years.A debenture is a company's debt, governed by the deed, with a hierarchy of collateral (secured, floating, unsecured, subordinated) and no FGC; tax-incentivized debentures exempt individuals from Income Tax.Declining Income Tax (22.5% → 15%) and tax exemptions require comparing everything on a net basis, using the gross-up: tax-exempt rate / (1 − tax rate).In the next lesson, we return to prices with fixed income's most elegant tool: duration — the number that summarizes, at a glance, how much your security swings when the curve moves.Exercise for classroom discussionThe manager's menu. Let's think it through together.Rodrigo sold a property and has R$ 400,000 to invest for around 3 years, when he plans to buy another property. The manager offered four options:I. CDB from the major bank itself, 101% of the CDI, daily liquidity.II. CDB from a mid-sized bank, 121% of the CDI, maturity in 3 years, with no liquidity before then.III. LCI from the major bank, 91% of the CDI, maturity in 2 years.IV. Tax-incentivized debenture issued by a highway concessionaire, IPCA + 7.2%, maturity in 8 years, no FGC, rating AA.Assume the CDI is 15% per year and discuss with your group:(a) Calculate the approximate annual net return of I, II and III over the 3-year horizon (15% Income Tax for the taxable investments). Which one wins the numerical comparison?(b) If Rodrigo invests the full R$ 400 thousand in option II, what risk will he be taking on that does not appear in the calculation in item (a)?(c) Option IV has the highest "window-dressing" rate when inflation is factored in. Why might it be the least suitable for THIS investor, even with an AA rating?(d) The LCI's term (2 years) does not match the objective (3 years). Is that a problem? What would Rodrigo face when it matures?(e) Put together a final allocation for Rodrigo combining the options — and defend each choice using the lesson's criteria.Guidance for the instructor: (a) I: 15.15% × 0.85 ≈ 12.88%; II: 18.15% × 0.85 ≈ 15.43%; III: 13.65% tax-exempt. II wins by a comfortable margin on the math—and that is where the discussion lies. (b) R$ 400 thousand > R$ 250 thousand: R$ 150 thousand (plus the returns on the entire amount) would remain beyond FGC coverage at a mid-sized bank—a real and poorly perceived credit risk; splitting the money between two mid-sized banks would solve it. (c) A severe maturity mismatch: an 8-year maturity for a 3-year goal means selling early at the market price of a long-term IPCA-linked security (the “private” NTN-B from Lesson 5) + uncertain secondary-market liquidity; a rating protects against default, not price fluctuations. (d) Reinvestment: in year 3, it will have to be reinvested at the rates available then—a reinvestment risk that is acceptable but still exists. (e) There is no single correct answer: a defensible allocation would be R$ 200 thousand to II (within FGC coverage), R$ 150 thousand to III (tax-exempt and nearly matched to the goal) and ~R$ 50 thousand to I (liquidity for emergencies), leaving IV for someone with an 8-year horizon—the conclusion is to show that the decision uses the four questions in section 5, not the highest rate on display.Exercises1) (Original - CESGRANRIO style) The Credit Guarantee Fund (FGC) guarantees the repayment of deposits and credit held at financial institutions in the event of liquidation, subject to the limit, per CPF or CNPJ and per financial conglomerate, of:A) R$ 250,000.00, with an overall cap of R$ 1,000,000.00 renewed every 4 years.B) R$ 250,000.00, with no overall cap.C) R$ 1,000,000.00 per institution, with no overall cap.D) R$ 100,000.00, with an overall cap of R$ 400,000.00.E) R$ 500,000.00, with an overall cap of R$ 2,000,000.00 renewed every 2 years.2) (Original - CESGRANRIO style) Which of the investments below does NOT have coverage from the Credit Guarantee Fund?A) a debenture issued by a publicly traded company.B) a Bank Deposit Certificate (CDB).C) a Real Estate Credit Bill (LCI).D) an Agribusiness Credit Bill (LCA).E) a savings account deposit.3) (Original - CESGRANRIO style) An individual investor redeemed, after two and a half years, a CDB whose accumulated gross return was R$ 10,000.00. The withholding income tax was:A) R$ 1,500.00.B) R$ 2,250.00.C) R$ 2,000.00.D) R$ 1,750.00.E) R$ 0.00, because it is a bank security.4) (Original - CESGRANRIO style) Considering the 15% income tax rate (investments held for more than 720 days), a tax-exempt LCI paying 90% of the CDI is equivalent, for an individual investor, to a taxable CDB paying approximately:A) 106% of the CDI.B) 90% of the CDI.C) 76% of the CDI.D) 100% of the CDI.E) 118% of the CDI.5) (Original - FGV style) Among the types of debentures classified by their guarantees, the one that gives its holder payment priority only over the shareholders of the issuing company is the:A) subordinated debenture.B) unsecured debenture.C) secured debenture.D) debenture with a floating charge.E) incentivized debenture.6) (Original - FGV style) Incentivized debentures, issued under Law No. 12,431/2011 to finance infrastructure projects, are characterized by offering:A) exemption from income tax on returns earned by individuals, with no FGC coverage.B) FGC coverage of up to R$ 250,000.00, with standard regressive taxation.C) income tax exemption for individuals and legal entities, with a guarantee from the National Treasury.D) returns necessarily linked to the CDI, with IOF exemption.E) a mandatory security interest over the assets of the financed project.7) (Original - CEBRASPE style, judge the item) Judge the item: "In the taxation of traditional fixed-income investments, the income tax rate is determined by the security's index, with CDI-linked instruments subject to the minimum rate of 15%."( ) Correct ( ) Incorrect8) (Original - CEBRASPE style, judge the item) Judge the item: "The credit spread required on a debenture tends to be higher the worse the perception of the issuer's risk and the weaker the type of guarantee offered, with a subordinated debenture generally yielding more than a debenture with a security interest issued by the same issuer."( ) Correct ( ) IncorrectAnswer Key1) A — R$ 250 thousand per CPF/CNPJ and per financial conglomerate, with an overall cap of R$ 1 million renewed every 4 years. Both layers of the limit are tested together.2) A — A debenture is corporate credit, outside the banking system covered by the FGC. CDBs, LCIs, LCAs and savings accounts are on the coverage list—the absence of debentures is the most common trick in questions on the topic.3) A — 2 and a half years > 720 days → 15% rate → 15% × R$ 10,000 = R$ 1,500. The other options use the rates for the shorter holding periods in the regressive table.4) A — Gross-up: (90% × CDI) / 0.85 ≈ 105.9% of the CDI. In market practice, divide the tax-exempt rate by 0.85 when the comparable tax rate is 15%.5) A — The subordinated debenture ranks behind all other creditors, taking priority only over shareholders—and therefore pays the highest spread. An unsecured debenture ranks equally with ordinary creditors, one position higher.6) A — The incentivized package is: income tax exemption for individuals + no FGC coverage (it is corporate risk). Option C is wrong because it extends the exemption to legal entities and invents a Treasury guarantee.7) Incorrect — The rate depends on the TERM of the investment (the regressive table ranges from 22.5% to 15%), not on the index. A CDI-linked CDB redeemed after 3 months is taxed at 22.5%.8) Correct — The spread increases with issuer risk and with the weakness of the guarantee. Among securities issued by the same issuer, the subordinated debenture requires (and offers) a higher rate than one with a security interest because it ranks behind it.
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