CDI (Certificado de Depósito Interbancário) is a key benchmark for fixed-income investments in Brazil. It reflects the average one-day lending rate between banks and helps investors compare yields across CDBs, funds, and other products.
CDI (Certificado de Depósito Interbancário) is the index that reflects the average one-day lending rate between banks in Brazil. It acts as a thermometer for the money market and serves as a benchmark for CDBs, LCIs, LCAs, funds, and other fixed-income products.
Understanding CDI helps finance and treasury teams compare yield alternatives and make better capital allocation decisions alongside a spend management platform that provides visibility into corporate cash flow.
Main CDI-linked instruments include CDBs, Tesouro Direto, fixed-income funds, debentures, CRIs, CRAs, LCAs, LCIs, and part of savings-account yields. Each varies in term, liquidity, taxation, and issuer risk.
In a corporate context, surplus allocation and expense policy work together with corporate cards with real-time control, which help separate operating cash from capital available for investment.
Returns depend on rate type (fixed, floating, or hybrid), term, initial capital, and whether interest compounds simply or on a compound basis. The base formula is: final value = initial value × (1 + rate)^time.
Use this calculator to simulate scenarios with the current rate. To compare whether that yield justifies investing in operational automation, you can also project returns with the ROI Calculator.
Investing in CDI-linked instruments offers relative safety, liquidity in many products, yields above traditional savings, and diversification across CDBs, LCIs, LCAs, and funds. Drawbacks include returns capped by the Selic rate, credit risk on some issuers, and volatility in floating-rate products.
For companies, the decision is not only personal investment: it also affects treasury management and corporate expense control when surplus cash is allocated between fixed income, operations, and growth.
CDI is the main benchmark for fixed-income investments in Brazil, but it is not the only option. Depending on your goals, you may also consider IPCA (inflation protection), Selic (safety and predictability), Ibovespa (equity returns), or international indexes such as the S&P 500.
For finance teams comparing yields with real-time accounting data, it helps to cross-check these decisions with automated accounting fields and data synced from your ERP.
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